# 笹倉 直樹

Last Update: 2018/06/12 10:41:31

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Name(Kanji/Kana/Abecedarium Latinum)

Primary department(Org1/Job title)
Yukawa Institute for eoretical Physics (YITP)/Associate Professor
Affiliated programs (koza)
Org1 Job title
Office 〒606-8502　京都府京都市左京区北白川追分町 Kitashirakawa Oiwakecho, Sakyo-ku, kyoto, 606-8502, Japan
sasakura ＠ yukawa.kyoto-u.ac.jp
Organization name(Japanese) Organization name(English)

Field(Japanese) Field(English) University(Japanese) University(English) Method

University(Japanese) University(English) Faculty(Japanese) Faculty(English) Major(Japanese) Major(English) Degree

University
University(Japanese) University(English) Faculty(Japanese) Faculty(English) Major(s)(Japanese) Major(s)(English) Degree

Work Experience
Period Organization(Japanese) Organization(English) Job title(Japanese) Job title(English)
2000/10/- 京都大学基礎物理学研究所 Yukawa Institute for Theoretical Physics, Kyoto Univ. 助教授、准教授 Associate Professor
1997/11/-2000/09/ 京都大学大学院理学研究科 Dep.of Physics, Kyoto Univ. 助手 Assistant Professor
1996/12/-1997/10/ ニールスボーア研究所（デンマーク） Niels Bohr Institute, Denmark PD PD
1994/04/-1996/11/ KEK KEK 日本学術振興会特別研究員(PD) JSPS fellow (PD)
1993/04/-1994/03/ 東京大学理学部 Department of Physics, Univ. of Tokyo 日本学術振興会特別研究員(PD) JSPS fellow (PD)
1992/04/-1993/03/ 京都大学理学部物理学科 Department of Physics, Faculty of Science, Kyoto Univ. 日本学術振興会特別研究員(DC2) JSPS fellow (DC2)
Personal Profile
(Japanese)

(English)
I am investigating quantum gravity from theoretical view points. I am especially interested in a tensor model in the canonical formalism, which is supposed to generate macroscopic spacetimes and general relativistic systems on them. Recently I am working on applying the mathematical techniques in recent numerical data analysis such as tensor-rank decompositions and persistent homology to interpret the time-dependent dynamics of the canonical tensor model as the dynamics of the generation of macroscopic spacetimes and general relativistic systems on them. In this research understanding the properties of the exact wave functions of the quantum canonical tensor model is indispensable, and this is being approached by theoretical and numerical methods.
ORCID ID
orcid.org/0000-0003-3668-1074
Research Topics
(Japanese)

(English)
Quantum gravity, Tensor models, Fuzzy spaces, Tensor-rank decomposition, Persistent homology, Discrete mathematics, Randomly connected tensor networks
(Japanese)

(English)
To describe phenomena in strong gravitational space-time regions such as at the birth of our universe or near black holes, to explain why and how our universe began, and to answer some fundamental questions such as what is a black hole and what is the spacetime, quantum theory of gravity is considered to be necessary. However, presently, such a fundamental theory has not yet been constructed. The main reason for this is that general relativity and quantum mechanics, which are believed to be the correct descriptions in large and small scales, respectively, are mutually incompatible. So, if the two theories have been consistently merged, all the aspects of the present fundamental theory will be replaced and the human kind will achieve a new stage of wisdom. But, irrespective of long-time efforts, presently, there is not even a single good research direction which most researchers agree on. In such circumstances, one of the current popular directions is to suppose that space-time is not a fundamental entity but is a phenomenon emergent from more fundamental degrees of freedom. I am doing researches on quantum gravity based on this idea of emergent space-time in terms of a tensor model in the canonical formalism and the notion of fuzzy spaces. One of our recent achievements is the development of a mathematical procedure to extract spacetime pictures from the time-dependent dynamics of the canonical tensor model. This procedure is based on the new mathematical and numerical data analysis techniques such as tensor-rank decompositions and persistent homology. These techniques extract quantitative concrete spacetime pictures from rather abstract time-dependent tensors in the dynamics of the canonical tensor model. As another achievement, we have found that the exact wave functions of the canonical tensor model have strong peaks at the configurations invariant under Lie-group symmetries. This result is quite encouraging for quantum gravity because, as well known, Lie-group symmetries such as Lorentz, de-Sitter, and gauge, are accompanied with our spacetimes. These successful achievements encourage us to carry out the next research direction of extracting spacetime interpretations from the configurations corresponding to the wave function peaks by using the mathematical procedure mentioned above.
Fields of research (key words)
Key words(Japanese) Key words(English)

テンソル模型 Tensor model

テンソルランク分解 Tensor-rank decomposition
パーシステントホモロジー Persistent homology

Fields of research (kaken code)
Kaken code
Elementary particle/atomic nucleus/cosmic ray/space physics
Published Papers
Author Author(Japanese) Author(English) Title Title(Japanese) Title(English) Bibliography Bibliography(Japanese) Bibliography(English) Publication date Refereed paper Language Publishing type
Taigen Kawano, Dennis Obster, Naoki Sasakura Taigen Kawano, Dennis Obster, Naoki Sasakura Taigen Kawano, Dennis Obster, Naoki Sasakura Canonical tensor model through data analysis -- Dimensions, topologies, and geometries -- Canonical tensor model through data analysis -- Dimensions, topologies, and geometries -- Canonical tensor model through data analysis -- Dimensions, topologies, and geometries -- 2018/05/13 Research paper(scientific journal)
Dennis Obster, Naoki Sasakura Dennis Obster, Naoki Sasakura Dennis Obster, Naoki Sasakura Emergent symmetries in the canonical tensor model Emergent symmetries in the canonical tensor model Emergent symmetries in the canonical tensor model PTEP, 2018, 4, 043A01 PTEP, 2018, 4, 043A01 PTEP, 2018, 4, 043A01 2018/04 Refereed English Research paper(scientific journal)
Dennis Obster, Naoki Sasakura Dennis Obster, Naoki Sasakura Dennis Obster, Naoki Sasakura Symmetric configurations highlighted by collective quantum coherence Symmetric configurations highlighted by collective quantum coherence Symmetric configurations highlighted by collective quantum coherence Eur.Phys.J., C77 (2017), 11, 783 Eur.Phys.J., C77 (2017), 11, 783 Eur.Phys.J., C77 (2017), 11, 783 2017/11 Refereed English Research paper(scientific journal)
Hua Chen, Naoki Sasakura, Yuki Sato Hua Chen, Naoki Sasakura, Yuki Sato Hua Chen, Naoki Sasakura, Yuki Sato Emergent classical geometries on boundaries of randomly connected tensor networks Emergent classical geometries on boundaries of randomly connected tensor networks Emergent classical geometries on boundaries of randomly connected tensor networks Phys. Rev. D 93, 064071 (2016), 93, 6,Pt.B, 15 Phys. Rev. D 93, 064071 (2016), 93, 6,Pt.B, 15 Phys. Rev. D 93, 064071 (2016), 93, 6,Pt.B, 15 2016/01 Refereed English Research paper(scientific journal)
Gaurav Narain, Naoki Sasakura Gaurav Narain, Naoki Sasakura Gaurav Narain, Naoki Sasakura An $OSp$ extension of Canonical Tensor Model An $OSp$ extension of Canonical Tensor Model An $OSp$ extension of Canonical Tensor Model Progress of Theoretical and Experimental Physics, 2015, 12, 5 Progress of Theoretical and Experimental Physics, 2015, 12, 5 Progress of Theoretical and Experimental Physics, 2015, 12, 5 2015/09 Refereed English Research paper(scientific journal)
Naoki Sasakura, Yuki Sato Naoki Sasakura, Yuki Sato Naoki Sasakura, Yuki Sato Constraint algebra of general relativity from a formal continuum limit of canonical tensor model Constraint algebra of general relativity from a formal continuum limit of canonical tensor model Constraint algebra of general relativity from a formal continuum limit of canonical tensor model Journal of High Energy Physics, 2015, 10 Journal of High Energy Physics, 2015, 10 Journal of High Energy Physics, 2015, 10 2015/06 Refereed English Research paper(scientific journal)
Naoki Sasakura, Yuki Sato Naoki Sasakura, Yuki Sato Naoki Sasakura, Yuki Sato Renormalization procedure for random tensor networks and the canonical tensor model Renormalization procedure for random tensor networks and the canonical tensor model Renormalization procedure for random tensor networks and the canonical tensor model Progress of Theoretical and Experimental Physicsress, 2015, 4, 9 Progress of Theoretical and Experimental Physicsress, 2015, 4, 9 Progress of Theoretical and Experimental Physicsress, 2015, 4, 9 2015/01 Refereed English Research paper(scientific journal)
Gaurav Narain, Naoki Sasakura, Yuki Sato Gaurav Narain, Naoki Sasakura, Yuki Sato Gaurav Narain, Naoki Sasakura, Yuki Sato Physical states in the canonical tensor model from the perspective of random tensor networks Physical states in the canonical tensor model from the perspective of random tensor networks Physical states in the canonical tensor model from the perspective of random tensor networks Journal of High Energy Physics, 2015, 1 Journal of High Energy Physics, 2015, 1 Journal of High Energy Physics, 2015, 1 2015/01 Refereed English Research paper(scientific journal)
Naoki Sasakura, Yuki Sato Naoki Sasakura, Yuki Sato Naoki Sasakura, Yuki Sato Exact free energies of statistical systems on random networks Exact free energies of statistical systems on random networks Exact free energies of statistical systems on random networks Symmetry, Integrability and Geometry: Methods and Applications (SIGMA), 10 Symmetry, Integrability and Geometry: Methods and Applications (SIGMA), 10 Symmetry, Integrability and Geometry: Methods and Applications (SIGMA), 10 2014/08 Refereed English Research paper(scientific journal)
Naoki Sasakura, Yuki Sato Naoki Sasakura, Yuki Sato Naoki Sasakura, Yuki Sato Ising model on random networks and the canonical tensor model Ising model on random networks and the canonical tensor model Ising model on random networks and the canonical tensor model Progress of Theoretical and Experimental Physics, 2014, 5, 3 Progress of Theoretical and Experimental Physics, 2014, 5, 3 Progress of Theoretical and Experimental Physics, 2014, 5, 3 2014/01 Refereed English Research paper(scientific journal)
Naoki Sasakura Naoki Sasakura Naoki Sasakura Canonical Tensor Model with Local Time and its Uniqueness Canonical Tensor Model with Local Time and its Uniqueness Canonical Tensor Model with Local Time and its Uniqueness Proceedings of The XXIX International Colloquium on Group-Theoretical Methods in Physics, August 20-26, 2012, Chern Institute of Mathematics, Tianjin, China Proceedings of The XXIX International Colloquium on Group-Theoretical Methods in Physics, August 20-26, 2012, Chern Institute of Mathematics, Tianjin, China Proceedings of The XXIX International Colloquium on Group-Theoretical Methods in Physics, August 20-26, 2012, Chern Institute of Mathematics, Tianjin, China 2013/02 Refereed Research paper(international conference proceedings)
Naoki Sasakura Naoki Sasakura Naoki Sasakura An invariant approach to dynamical fuzzy spaces with a three-index variable -- Euclidean models An invariant approach to dynamical fuzzy spaces with a three-index variable -- Euclidean models An invariant approach to dynamical fuzzy spaces with a three-index variable -- Euclidean models Proceedings of the 4th International Symposium "Quantum Theory and Symmetries" (QTS-4), 15-21 August 2005, Varna, Bulgaria, Proceedings of the 4th International Symposium "Quantum Theory and Symmetries" (QTS-4), 15-21 August 2005, Varna, Bulgaria, Proceedings of the 4th International Symposium "Quantum Theory and Symmetries" (QTS-4), 15-21 August 2005, Varna, Bulgaria, 2005/11 Refereed Research paper(international conference proceedings)
Gaurav Narain, Naoki Sasakura Gaurav Narain, Naoki Sasakura Mother canonical tensor model Mother canonical tensor model Classical and Quantum Gravity, 34, 14, 145009 , 34, 14, 145009 Classical and Quantum Gravity, 34, 14, 145009 2017/06 Refereed English Research paper(scientific journal)
Hua Chen, Naoki Sasakura, Yuki Sato Hua Chen, Naoki Sasakura, Yuki Sato Equation of motion of canonical tensor model and Hamilton-Jacobi equation of general relativity Equation of motion of canonical tensor model and Hamilton-Jacobi equation of general relativity Physical Review, D95, 6, 066008 , D95, 6, 066008 Physical Review, D95, 6, 066008 2017/03 Refereed English Research paper(scientific journal)
N. Sasakura; Y. Sato N. Sasakura; Y. Sato Interpreting canonical tensor model in minisuperspace Interpreting canonical tensor model in minisuperspace Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 732, 32-35 , 732, 32-35 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 732, 32-35 2014 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Quantization of the canonical tensor model and an exact wave function Quantization of the canonical tensor model and an exact wave function Journal of Physics: Conference Series, 490, 1 , 490, 1 Journal of Physics: Conference Series, 490, 1 2014 Refereed English Research paper(international conference proceedings)
N. Sasakura N. Sasakura A canonical rank-three tensor model with a scaling constraint A canonical rank-three tensor model with a scaling constraint International Journal of Modern Physics A, 28, 10 , 28, 10 International Journal of Modern Physics A, 28, 10 2013/04 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Quantum canonical tensor model and an exact wave function Quantum canonical tensor model and an exact wave function International Journal of Modern Physics A, 28, 21 , 28, 21 International Journal of Modern Physics A, 28, 21 2013 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Uniqueness of canonical tensor model with local time Uniqueness of canonical tensor model with local time International Journal of Modern Physics A, 27, 18 , 27, 18 International Journal of Modern Physics A, 27, 18 2012/07 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Canonical tensor models with local time Canonical tensor models with local time International Journal of Modern Physics A, 27, 5 , 27, 5 International Journal of Modern Physics A, 27, 5 2012/02 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Tensor models and 3-ary algebras Tensor models and 3-ary algebras Journal of Mathematical Physics, 52, 10, 103510 , 52, 10, 103510 Journal of Mathematical Physics, 52, 10, 103510 2011/10 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Super tensor models, super fuzzy spaces and super n-ary transformations Super tensor models, super fuzzy spaces and super n-ary transformations International Journal of Modern Physics A, 26, 24, 4203-4216 , 26, 24, 4203-4216 International Journal of Modern Physics A, 26, 24, 4203-4216 2011/09 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Tensor models and hierarchy of n-ary algebras Tensor models and hierarchy of n-ary algebras International Journal of Modern Physics A, 26, 19, 3249-3258 , 26, 19, 3249-3258 International Journal of Modern Physics A, 26, 19, 3249-3258 2011/07 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura A renormalization procedure for tensor models and scalar-tensor theories of gravity A renormalization procedure for tensor models and scalar-tensor theories of gravity International Journal of Modern Physics A, 25, 23, 4475-4492 , 25, 23, 4475-4492 International Journal of Modern Physics A, 25, 23, 4475-4492 2010/09 Refereed English Research paper(scientific journal)
Naoki Sasakura Naoki Sasakura Hopf algebra description of quantum circuits Hopf algebra description of quantum circuits arXiv:1002.3661v2[quant-ph] arXiv:1002.3661v2[quant-ph] 2010 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Gauge fixing in the tensor model and emergence of local gauge symmetries Gauge fixing in the tensor model and emergence of local gauge symmetries Progress of Theoretical Physics, 122, 2, 309-322 , 122, 2, 309-322 Progress of Theoretical Physics, 122, 2, 309-322 2009/08 Refereed English Research paper(scientific journal)
Y. Sasai; N. Sasakura Y. Sasai; N. Sasakura The cutkosky rule of three dimensional noncommutative field theory in Lie algebraic noncommutative spacetime The cutkosky rule of three dimensional noncommutative field theory in Lie algebraic noncommutative spacetime Journal of High Energy Physics, 2009, 6 , 2009, 6 Journal of High Energy Physics, 2009, 6 2009/06 Refereed English Research paper(scientific journal)
SASAI Yuya;SASAKURA Naoki SASAI Yuya;SASAKURA Naoki Massive particles coupled with 2+1 dimensional gravity and noncommutative field theory Massive particles coupled with 2+1 dimensional gravity and noncommutative field theory YITP, 09-10, 20P , 09-10, 20P YITP, 09-10, 20P 2009/02 English Research paper(international conference proceedings)
Y. Sasai; N. Sasakura Y. Sasai; N. Sasakura The Cutkosky rule of three dimensional noncommutative field theory in lie algebraic noncommutative spacetime The Cutkosky rule of three dimensional noncommutative field theory in lie algebraic noncommutative spacetime AIP Conference Proceedings, 1196, 240-247 , 1196, 240-247 AIP Conference Proceedings, 1196, 240-247 2009 Refereed English Research paper(international conference proceedings)
N. Sasakura N. Sasakura Emergent general relativity and local translation symmetry in tensor model Emergent general relativity and local translation symmetry in tensor model AIP Conference Proceedings, 1196, 248-257 , 1196, 248-257 AIP Conference Proceedings, 1196, 248-257 2009 English Research paper(international conference proceedings)
N. Sasakura N. Sasakura Emergent general relativity in fuzzy spaces from tensor models Emergent general relativity in fuzzy spaces from tensor models Progress of Theoretical Physics, 119, 6, 1029-1040 , 119, 6, 1029-1040 Progress of Theoretical Physics, 119, 6, 1029-1040 2008/06 Refereed English Research paper(scientific journal)
Y. Sasai; N. Sasakura Y. Sasai; N. Sasakura Domain wall solitons and Hopf algebraic translational symmetries in noncommutative field theories Domain wall solitons and Hopf algebraic translational symmetries in noncommutative field theories International Journal of Modern Physics A, 23, 14-15, 2277-2278 , 23, 14-15, 2277-2278 International Journal of Modern Physics A, 23, 14-15, 2277-2278 2008/06 Refereed English Research paper(international conference proceedings)
Naoki Sasakura Naoki Sasakura Preface(NONCOMMUTATIVE GEOMETRY AND QUANTUM SPACETIME IN PHYSICS) Preface(NONCOMMUTATIVE GEOMETRY AND QUANTUM SPACETIME IN PHYSICS) Progress of theoretical physics. Supplement, 171 , 171 Progress of theoretical physics. Supplement, 171 2008/03/07 English
N. Sasakura N. Sasakura The fluctuation spectra around a Gaussian classical solution of a tensor model and the general relativity The fluctuation spectra around a Gaussian classical solution of a tensor model and the general relativity International Journal of Modern Physics A, 23, 5, 693-718 , 23, 5, 693-718 International Journal of Modern Physics A, 23, 5, 693-718 2008/02 Refereed English Research paper(scientific journal)
SASAI Yuya;SASAKURA Naoki SASAI Yuya;SASAKURA Naoki Domain wall solitons and Hopf algebraic translational symmetries in noncommutative field theories Domain wall solitons and Hopf algebraic translational symmetries in noncommutative field theories Phys Rev D Part Fields Gravit Cosmol, 77, 4, 1-45033 , 77, 4, 1-45033 Phys Rev D Part Fields Gravit Cosmol, 77, 4, 1-45033 2008/02 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura The lowest modes around Gaussian solutions of tensor models and the general relativity The lowest modes around Gaussian solutions of tensor models and the general relativity International Journal of Modern Physics A, 23, 24, 3863-3890 , 23, 24, 3863-3890 International Journal of Modern Physics A, 23, 24, 3863-3890 2008 Refereed English Research paper(scientific journal)
Y. Sasai; N. Sasakura Y. Sasai; N. Sasakura Braided quantum field theories and their symmetries Braided quantum field theories and their symmetries Progress of Theoretical Physics, 118, 4, 785-814 , 118, 4, 785-814 Progress of Theoretical Physics, 118, 4, 785-814 2007/10 Refereed English Research paper(scientific journal)
N. Sasakura; S. Watamura N. Sasakura; S. Watamura Progress of Theoretical Physics Supplement: Preface Progress of Theoretical Physics Supplement: Preface Progress of Theoretical Physics Supplement, 171, i , 171, i Progress of Theoretical Physics Supplement, 171, i 2007 Refereed English Research paper(international conference proceedings)
N. Sasakura, S. Watamura N. Sasakura, S. Watamura Noncommutative geometry and quantum spacetime in physics. Noncommutative geometry and quantum spacetime in physics. Prog. Theor. Phys. Suppl. 171 (2007) 1. Prog. Theor. Phys. Suppl. 171 (2007) 1. 2007 Refereed English Research paper(international conference proceedings)
N. Sasakura N. Sasakura Tensor model and dynamical generation of commutative non-associative fuzzy spaces Tensor model and dynamical generation of commutative non-associative fuzzy spaces Classical and Quantum Gravity, 23, 17, 5397-5416 , 23, 17, 5397-5416 Classical and Quantum Gravity, 23, 17, 5397-5416 2006/09 Refereed English Research paper(scientific journal)
Naoki Sasakura Naoki Sasakura One-loop unitarity of scalar field theories on Poincare invariant commutative nonassociative spacetimes "jointly worked" One-loop unitarity of scalar field theories on Poincare invariant commutative nonassociative spacetimes "jointly worked" JHEP,0609:046 JHEP,0609:046 2006 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura An invariant approach to dynamical fuzzy spaces with a three-index variable An invariant approach to dynamical fuzzy spaces with a three-index variable Modern Physics Letters A, 21, 13, 1017-1028 , 21, 13, 1017-1028 Modern Physics Letters A, 21, 13, 1017-1028 2006 Refereed English Research paper(scientific journal)
Y. Sasai; N. Sasakura Y. Sasai; N. Sasakura One-loop unitarity of scalar field theories on Poincaré invariant commutative nonassociative spacetimes One-loop unitarity of scalar field theories on Poincaré invariant commutative nonassociative spacetimes Journal of High Energy Physics, 9 , 9 Journal of High Energy Physics, 9 2006 Refereed English Research paper(scientific journal)
Naoki Sasakura Naoki Sasakura EFFECTIVE LOCAL GEOMETRIC QUANTITIES IN FUZZY SPACES FROM HEAT KERNEL EXPANSIONS EFFECTIVE LOCAL GEOMETRIC QUANTITIES IN FUZZY SPACES FROM HEAT KERNEL EXPANSIONS JHEP,0503:015 JHEP,0503:015 2005 Refereed English Research paper(scientific journal)
Naoki Sasakura Naoki Sasakura Geometry in fuzzy spaces and heat kernel expansions Geometry in fuzzy spaces and heat kernel expansions An InternationalMeeting ‘Noncommutative Geometry, K-theory and Physics 2005’, March 4 - March 7, 2005, Hayama. An InternationalMeeting ‘Noncommutative Geometry, K-theory and Physics 2005’, March 4 - March 7, 2005, Hayama. 2005 Refereed English Research paper(international conference proceedings)
Sasakura, N Sasakura, N Heat kernel coefficients for compact fuzzy spaces Heat kernel coefficients for compact fuzzy spaces JOURNAL OF HIGH ENERGY PHYSICS, 12 , 12 JOURNAL OF HIGH ENERGY PHYSICS, 12 2004/12 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Evolving fuzzy C P <sup>n</sup> and lattice n-simplex Evolving fuzzy C P <sup>n</sup> and lattice n-simplex Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 599, 3/4, 319-325 , 599, 3/4, 319-325 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 599, 3/4, 319-325 2004/10 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Field theory on an evolving fuzzy 2-sphere Field theory on an evolving fuzzy 2-sphere Classical and Quantum Gravity, 21, 14, 3593-3609 , 21, 14, 3593-3609 Classical and Quantum Gravity, 21, 14, 3593-3609 2004/07 Refereed English Research paper(scientific journal)
Naoki Sasakura Naoki Sasakura NONUNITARY EVOLUTIONS OF NONCOMMUTATIVE WORLDS WITH SYMMETRY NONUNITARY EVOLUTIONS OF NONCOMMUTATIVE WORLDS WITH SYMMETRY JHEP,0401:016 JHEP,0401:016 2004 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Dualities of the entropy bound Dualities of the entropy bound Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 550, 3/4, 197-200 , 550, 3/4, 197-200 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 550, 3/4, 197-200 2002/12 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura A de-Sitter thick domain wall solution by elliptic functions A de-Sitter thick domain wall solution by elliptic functions Journal of High Energy Physics, 2 , 2 Journal of High Energy Physics, 2 2002/02 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Analytic continuations of de Sitter thick domain wall solutions Analytic continuations of de Sitter thick domain wall solutions Physical Review D, 66, 6, 1-65006 , 66, 6, 1-65006 Physical Review D, 66, 6, 1-65006 2002 Refereed English Research paper(scientific journal)
Sasakura, N Sasakura, N Geometry on string lattice Geometry on string lattice JOURNAL OF HIGH ENERGY PHYSICS, 3 , 3 JOURNAL OF HIGH ENERGY PHYSICS, 3 2001/03 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Low-energy propagation modes on string network Low-energy propagation modes on string network Journal of High Energy Physics, 5, 2, XXXXIII-8 , 5, 2, XXXXIII-8 Journal of High Energy Physics, 5, 2, XXXXIII-8 2001 Refereed English Research paper(scientific journal)
Imai, S; Sasakura, N Imai, S; Sasakura, N Scalar field theories in a Lorentz-invariant three-dimensional non-commutative space-time Scalar field theories in a Lorentz-invariant three-dimensional non-commutative space-time JOURNAL OF HIGH ENERGY PHYSICS, 9 , 9 JOURNAL OF HIGH ENERGY PHYSICS, 9 2000/09 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Space-time uncertainty relation and Lorentz invariance Space-time uncertainty relation and Lorentz invariance Journal of High Energy Physics, 4, 5 PART A, XXIV-13 , 4, 5 PART A, XXIV-13 Journal of High Energy Physics, 4, 5 PART A, XXIV-13 2000 Refereed English Research paper(scientific journal)
S. Kawamoto; N. Sasakura S. Kawamoto; N. Sasakura Open membranes in a constant C-field background and non-commutative boundary strings Open membranes in a constant C-field background and non-commutative boundary strings Journal of High Energy Physics, 4, 7 PART A, XXIII-21 , 4, 7 PART A, XXIII-21 Journal of High Energy Physics, 4, 7 PART A, XXIII-21 2000 Refereed English Research paper(scientific journal)
Bak, D; Hashimoto, K; Lee, BH; Min, H; Sasakura, N Bak, D; Hashimoto, K; Lee, BH; Min, H; Sasakura, N Moduli space dimensions of multipronged strings Moduli space dimensions of multipronged strings PHYSICAL REVIEW D, 60, 4 , 60, 4 PHYSICAL REVIEW D, 60, 4 1999/08 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura An uncertainty relation of space-time An uncertainty relation of space-time Progress of Theoretical Physics, 102, 1, 169-179 , 102, 1, 169-179 Progress of Theoretical Physics, 102, 1, 169-179 1999/07 Refereed English Research paper(scientific journal)
N. Sasakura; S. Sugimoto N. Sasakura; S. Sugimoto M-theory description of 1/4 BPS states in N = 4 supersymmetric Yang-Mills theory M-theory description of 1/4 BPS states in N = 4 supersymmetric Yang-Mills theory Progress of Theoretical Physics, 101, 3, 749-761 , 101, 3, 749-761 Progress of Theoretical Physics, 101, 3, 749-761 1999/03 Refereed English Research paper(scientific journal)
J. Ambjørn; D. Espriu; N. Sasakura J. Ambjørn; D. Espriu; N. Sasakura U(1) lattice gauge theory and N = 2 supersymmetric Yang-Mills theory U(1) lattice gauge theory and N = 2 supersymmetric Yang-Mills theory Fortschritte der Physik, 47, 1-3, 287-292 , 47, 1-3, 287-292 Fortschritte der Physik, 47, 1-3, 287-292 1999 English Research paper(international conference proceedings)
N. Sasakura N. Sasakura String junction and 1/4 BPS state in N = 4 SYM theory String junction and 1/4 BPS state in N = 4 SYM theory Progress of Theoretical Physics Supplement, 135, 118-126 , 135, 118-126 Progress of Theoretical Physics Supplement, 135, 118-126 1999 Refereed English Research paper(international conference proceedings)
K. Hashimoto; H. Hata; N. Sasakura K. Hashimoto; H. Hata; N. Sasakura Multi-pronged strings and BPS saturated solutions in SU(N) supersymmetric Yang-Mills theory Multi-pronged strings and BPS saturated solutions in SU(N) supersymmetric Yang-Mills theory Nuclear Physics B, 535, 1-2, 83-115 , 535, 1-2, 83-115 Nuclear Physics B, 535, 1-2, 83-115 1998/12 Refereed English Research paper(scientific journal)
K. Hashimoto; H. Hata; N. Sasakura K. Hashimoto; H. Hata; N. Sasakura 3-String junction and BPS saturated solutions in SU(3) supersymmetric Yang-Mills theory 3-String junction and BPS saturated solutions in SU(3) supersymmetric Yang-Mills theory Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 431, 3/4, 303-310 , 431, 3/4, 303-310 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 431, 3/4, 303-310 1998/07 Refereed English Research paper(scientific journal)
Naoki Sasakura Naoki Sasakura M THEORY DESCRIPTION OF BPS STRING IN SEVEN-BRANE BACKGROUND. (jointly worked) M THEORY DESCRIPTION OF BPS STRING IN SEVEN-BRANE BACKGROUND. (jointly worked) Physics Letters,B432/,305-309, 432, 3/4, 305-309 , 432, 3/4, 305-309 Physics Letters,B432/,305-309, 432, 3/4, 305-309 1998 Refereed English Research paper(scientific journal)
J. Ambjørn; N. Sasakura; D. Espriu J. Ambjørn; N. Sasakura; D. Espriu U(1) lattice gauge theory and N = 2 supersymmetric yang-mills theory U(1) lattice gauge theory and N = 2 supersymmetric yang-mills theory Modern Physics Letters A, 12, 35, 2665-2681 , 12, 35, 2665-2681 Modern Physics Letters A, 12, 35, 2665-2681 1997/11 Refereed English Research paper(scientific journal)
K. Ito; N. Sasakura K. Ito; N. Sasakura Exact and microscopic one-instanton calculations in N = 2 supersymmetric Yang-Mills theories Exact and microscopic one-instanton calculations in N = 2 supersymmetric Yang-Mills theories Nuclear Physics B, 484, 1-2, 141-166 , 484, 1-2, 141-166 Nuclear Physics B, 484, 1-2, 141-166 1997/01 Refereed English Research paper(scientific journal)
K. Ito; N. Sasakura K. Ito; N. Sasakura One-instanton calculations in N = 2 SU(N<sub>c</sub>) supersymmetric QCD One-instanton calculations in N = 2 SU(N<sub>c</sub>) supersymmetric QCD Modern Physics Letters A, 12, 3, 205-216 , 12, 3, 205-216 Modern Physics Letters A, 12, 3, 205-216 1997/01 Refereed English Research paper(scientific journal)
I. Katsushi; N. Sasakura I. Katsushi; N. Sasakura One-instanton calculations in N = 2 supersymmetric SU(N<sub>c</sub>) Yang-Mills theory One-instanton calculations in N = 2 supersymmetric SU(N<sub>c</sub>) Yang-Mills theory Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 382, 1/2, 95-103 , 382, 1/2, 95-103 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 382, 1/2, 95-103 1996/08 Refereed English Research paper(scientific journal)
IKEHARA, M; ISHIBASHI, N; KAWAI, H; MOGAMI, T; NAKAYAMA, R; SASAKURA, N IKEHARA, M; ISHIBASHI, N; KAWAI, H; MOGAMI, T; NAKAYAMA, R; SASAKURA, N A NOTE ON STRING FIELD-THEORY IN THE TEMPORAL GAUGE A NOTE ON STRING FIELD-THEORY IN THE TEMPORAL GAUGE PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, 118, 241-257 , 118, 241-257 PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, 118, 241-257 1995 Refereed English Research paper(international conference proceedings)
N. Sasakura N. Sasakura Discrete phase transitions associated with topological lattice field theories in D2 dimensions Discrete phase transitions associated with topological lattice field theories in D2 dimensions Physical Review D, 51, 2, 703-717 , 51, 2, 703-717 Physical Review D, 51, 2, 703-717 1995 Refereed English Research paper(scientific journal)
M. Ikehara; N. Ishibashi; H. Kawai; T. Mogami; R. Nakayama; N. Sasakura M. Ikehara; N. Ishibashi; H. Kawai; T. Mogami; R. Nakayama; N. Sasakura String field theory in the temporal gauge String field theory in the temporal gauge Physical Review D, 50, 12, 7467-7478 , 50, 12, 7467-7478 Physical Review D, 50, 12, 7467-7478 1994/12 Refereed English Research paper(scientific journal)
N. Sasakura N. Sasakura Lattice topological field theory and first order phase transition Lattice topological field theory and first order phase transition Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 316, 2/3, 329-332 , 316, 2/3, 329-332 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 316, 2/3, 329-332 1993 Refereed English Research paper(scientific journal)
SASAKURA, N SASAKURA, N EXACT 3-DIMENSIONAL LATTICE GRAVITIES EXACT 3-DIMENSIONAL LATTICE GRAVITIES PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, 110, 191-205 , 110, 191-205 PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT, 110, 191-205 1992 Refereed English Research paper(international conference proceedings)
OOGURI H;SASAKURA N OOGURI H;SASAKURA N Discrete and continuum approaches to three-dimensional quantum gravity. Discrete and continuum approaches to three-dimensional quantum gravity. Mod Phys Lett A, 6, 39, 3591-3600 , 6, 39, 3591-3600 Mod Phys Lett A, 6, 39, 3591-3600 1991/12 Refereed English Research paper(scientific journal)
SASAKURA N SASAKURA N Tensor model for gravity and orientability of manifold. Tensor model for gravity and orientability of manifold. Mod Phys Lett A, 6, 28, 2613-2623 , 6, 28, 2613-2623 Mod Phys Lett A, 6, 28, 2613-2623 1991/09 Refereed English Research paper(scientific journal)
D. Lancaster; N. Sasakura D. Lancaster; N. Sasakura Three-particle solutions in (2+1)-dimensional gravity Three-particle solutions in (2+1)-dimensional gravity Classical and Quantum Gravity, 8, 8, 1481-1489 , 8, 8, 1481-1489 Classical and Quantum Gravity, 8, 8, 1481-1489 1991/08 Refereed English Research paper(scientific journal)
M. Bando; T. Kugo; N. Maekawa; N. Sasakura; Y. Watabiki; K. Suehiro M. Bando; T. Kugo; N. Maekawa; N. Sasakura; Y. Watabiki; K. Suehiro Compositeness condition in the renormalization group equation Compositeness condition in the renormalization group equation Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 246, 3-4, 466-470 , 246, 3-4, 466-470 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 246, 3-4, 466-470 1990/08 Refereed English Research paper(scientific journal)

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Title language:
Conference Activities & Talks
Title Title(Japanese) Title(English) Conference Conference(Japanese) Conference(English) Promotor Promotor(Japanese) Promotor(English) Date Language Assortment
Emergent symmetries in the canonical tensor model[Invited] Emergent symmetries in the canonical tensor model [Invited] Emergent symmetries in the canonical tensor model [Invited] 2nd Bangkok Workshop on Discrete Geometry and Statistics January 8-12, 2018, Chulalongkorn University, Bangkok, Thailand 2nd Bangkok Workshop on Discrete Geometry and Statistics January 8-12, 2018, Chulalongkorn University, Bangkok, Thailand 2nd Bangkok Workshop on Discrete Geometry and Statistics January 8-12, 2018, Chulalongkorn University, Bangkok, Thailand 2018/01 English Oral presentation(invited, special)
Introduction to the canonical tensor model[Invited] Introduction to the canonical tensor model [Invited] Introduction to the canonical tensor model [Invited] 2nd Bangkok Workshop on Discrete Geometry and Statistics January 8-12, 2018, Chulalongkorn University, Bangkok, Thailand 2nd Bangkok Workshop on Discrete Geometry and Statistics January 8-12, 2018, Chulalongkorn University, Bangkok, Thailand 2nd Bangkok Workshop on Discrete Geometry and Statistics January 8-12, 2018, Chulalongkorn University, Bangkok, Thailand 2018/01 English Oral presentation(invited, special)
Emergent symmetries in the Canonical Tensor Model Emergent symmetries in the Canonical Tensor Model Emergent symmetries in the Canonical Tensor Model “Discrete Approaches to the Dynamics of Fields and Space-Time”, September 19-23, 2017, APCTP, Pohang, Korea “Discrete Approaches to the Dynamics of Fields and Space-Time”, September 19-23, 2017, APCTP, Pohang, Korea “Discrete Approaches to the Dynamics of Fields and Space-Time”, September 19-23, 2017, APCTP, Pohang, Korea 2017/09/19 English Oral presentation(general)
Emergent symmetries in Canonical Tensor Model[Invited] Emergent symmetries in Canonical Tensor Model [Invited] Emergent symmetries in Canonical Tensor Model [Invited] Mini-symposium “Recent developments in Mathematical Physics”, September 8, 2017, Osaka Prefecture University Mini-symposium “Recent developments in Mathematical Physics”, September 8, 2017, Osaka Prefecture University Mini-symposium “Recent developments in Mathematical Physics”, September 8, 2017, Osaka Prefecture University 2017/09/08 English Oral presentation(invited, special)
Canonical Tensor Model and its relation to general relativity[Invited] Canonical Tensor Model and its relation to general relativity [Invited] Canonical Tensor Model and its relation to general relativity [Invited] EHQG Seminar, Nagoya University EHQGセミナー EHQG Seminar, Nagoya University 名古屋大学 名古屋大学 2017/02/28 English Public discourse, seminar, tutorial, course, lecture and others

Emergent classical geometries on boundaries of randomly connected tensor networks[Invited] Emergent classical geometries on boundaries of randomly connected tensor networks [Invited] Emergent classical geometries on boundaries of randomly connected tensor networks [Invited] KITPC, Beijing, China KITPC, Beijing, China KITPC, Beijing, China 2016/04/15 English Public discourse, seminar, tutorial, course, lecture and others
Emergent classical geometries on boundaries of randomly connected tensor networks[Invited] Emergent classical geometries on boundaries of randomly connected tensor networks [Invited] Emergent classical geometries on boundaries of randomly connected tensor networks [Invited] Seminar, Chulalongkorn Univ., Bangkok, Thailand Seminar, Chulalongkorn Univ., Bangkok, Thailand Seminar, Chulalongkorn Univ., Bangkok, Thailand 2016/02/03 English Oral presentation(invited, special)

Tensor model in canonical formalism, and its relation to general relativity and randomly connected tensor network[Invited] Tensor model in canonical formalism, and its relation to general relativity and randomly connected tensor network [Invited] Tensor model in canonical formalism, and its relation to general relativity and randomly connected tensor network [Invited] Seminar, AEI, Max-Planck Institute, Potsdam, Germany Seminar, AEI, Max-Planck Institute, Potsdam, Germany Seminar, AEI, Max-Planck Institute, Potsdam, Germany 2015/07/13 English Public discourse, seminar, tutorial, course, lecture and others
Continuum limit of canonical tensor model and general relativity Continuum limit of canonical tensor model and general relativity Continuum limit of canonical tensor model and general relativity Loops 2015, Erlangen, Germany Loops 2015, Erlangen, Germany Loops 2015, Erlangen, Germany 2015/07/10 English Oral presentation(general)
Canonical Tensor model, and its relation to general relativity and random tensor network[Invited] Canonical Tensor model, and its relation to general relativity and random tensor network [Invited] Canonical Tensor model, and its relation to general relativity and random tensor network [Invited] Seminar Seminar Seminar CPT, Marseille CPT, Marseille CPT, Marseille 2015/03/23 English Public discourse, seminar, tutorial, course, lecture and others
Canonical Tensor model, and its relation to general relativity and random tensor network[Invited] Canonical Tensor model, and its relation to general relativity and random tensor network [Invited] Canonical Tensor model, and its relation to general relativity and random tensor network [Invited] Seminar Seminar Seminar LPT, Orsay LPT, Orsay LPT, Orsay 2015/03/19 English Public discourse, seminar, tutorial, course, lecture and others

テンソル模型の量子化と厳密な波動関数 テンソル模型の量子化と厳密な波動関数 離散的手法による場と時空のダイナミクス2013 離散的手法による場と時空のダイナミクス2013 高エネルギー物理学研究所 高エネルギー物理学研究所 2013/09 Japanese Oral presentation(invited, special)
Canonical Tensor models with local time[Invited] Canonical Tensor models with local time [Invited] Canonical Tensor models with local time [Invited] Seminar Seminar Seminar Perimeter Institute Perimeter Institute Perimeter Institute 2012/11/15 English Public discourse, seminar, tutorial, course, lecture and others
Canonical tensor model with local time Canonical tensor model with local time 離散的手法による場と時空のダイナミクス2012 離散的手法による場と時空のダイナミクス2012 理化学研究所 理化学研究所 2012/08 Japanese Oral presentation(invited, special)
テンソル模型におけるスカラーテンソル重力理論の創発と更なる可能性[Invited] テンソル模型におけるスカラーテンソル重力理論の創発と更なる可能性 [Invited] 立教研究会「場の理論・量子重力研究会」 立教研究会「場の理論・量子重力研究会」 立教大学 立教大学 2011/01/05 Japanese Oral presentation(invited, special)
Geometry in fuzzy spaces and heat kernel expansions[Invited] Geometry in fuzzy spaces and heat kernel expansions [Invited] An InternationalMeeting ‘Noncommutative Geometry, K-theory and Physics 2005 An InternationalMeeting ‘Noncommutative Geometry, K-theory and Physics 2005 Keio University Keio University 2005/03/04 Japanese Oral presentation(invited, special)
Symmetric configurations highlighted by collective quantum coherence in Canonical Tensor Model and Random Tensor Networks Symmetric configurations highlighted by collective quantum coherence in Canonical Tensor Model and Random Tensor Networks The XXV International Conference on Integrable Systems and Quantum Symmetries The XXV International Conference on Integrable Systems and Quantum Symmetries 2017/06/06 English Oral presentation(general)
Discrete approaches to quantum gravity and Canonical Tensor Model[Invited] Discrete approaches to quantum gravity and Canonical Tensor Model [Invited] Bangkok Workshop on Discrete Geometry and Statistics Bangkok Workshop on Discrete Geometry and Statistics 2017/01/30 English Oral presentation(invited, special)
Canonical Tensor Model and Randomly Connected Tensor Networks[Invited] Canonical Tensor Model and Randomly Connected Tensor Networks [Invited] Bangkok Workshop on Discrete Geometry and Statistics Bangkok Workshop on Discrete Geometry and Statistics 2017/01/30 English Oral presentation(invited, special)
Fuzzy spaces from tensor models, cyclicity condition, and n-ary algebras Fuzzy spaces from tensor models, cyclicity condition, and n-ary algebras Workshop on Noncommutative Field Theory and Gravity Workshop on Noncommutative Field Theory and Gravity Corfu, Greece Corfu, Greece 2011/09/10 English Oral presentation(general)
Emergent scalar-tensor theories of gravity from tensor models[Invited] Emergent scalar-tensor theories of gravity from tensor models [Invited] QGC2010 NIMS-APCTP Joint International Workshops "String Theory and Cosmology" QGC2010 NIMS-APCTP Joint International Workshops "String Theory and Cosmology" NIMS, APCTP NIMS, APCTP 2010/10/01 English Oral presentation(invited, special)
Emergent General Relativity and local translation symmetry in the tensor models Emergent General Relativity and local translation symmetry in the tensor models "The Planck Scale," XXV Max Born Symposium, Wroclaw, Poland "The Planck Scale," XXV Max Born Symposium, Wroclaw, Poland Univ. of Wroclaw Univ. of Wroclaw 2009/06/29 English Oral presentation(general)
Tensor models as theory of dynamical fuzzy spaces and general relativity[Invited] Tensor models as theory of dynamical fuzzy spaces and general relativity [Invited] 8th International Workshop Lie Theory and Its Applications in Physics (LT-8) 8th International Workshop Lie Theory and Its Applications in Physics (LT-8) Bulgarian Academy of Sciences Bulgarian Academy of Sciences 2009/06/15 English Oral presentation(invited, special)
Emergence of space, general relativity and gauge theory from tensor models[Invited] Emergence of space, general relativity and gauge theory from tensor models [Invited] Sapporo Winter School 2009 Sapporo Winter School 2009 Hokkaido University Hokkaido University 2009/01/08 English Oral presentation(general)
Emergent general relativity in fuzzy spaces from tensor models Emergent general relativity in fuzzy spaces from tensor models Fourth International Workshop DICE2008 Fourth International Workshop DICE2008 Castiglioncello (Tuscany) Castiglioncello (Tuscany) 2008/09/22 English Oral presentation(general)
An Invariant approach to dynamical fuzzy spaces with a three-index variable[Invited] An Invariant approach to dynamical fuzzy spaces with a three-index variable [Invited] 4th International Symposium on Quantum Theory and Symmetries (QTS-4) 4th International Symposium on Quantum Theory and Symmetries (QTS-4) Bulgarian Academy of Sciences Bulgarian Academy of Sciences 2005/08/21 English Oral presentation(invited, special)

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Title language:
Books etc
Author Author(Japanese) Author(English) Title Title(Japanese) Title(English) Publisher Publisher(Japanese) Publisher(English) Publication date Language Type

Title language:
Personaly organized study/research groups
Group name Organization name Date
Discrete Approaches to the Dynamics of Fields and Space-Time APCTP, Pohang, Korea 2017/09/19

Strings 2003 基礎物理学研究所 2003/06/06
Summer Institute '98 (String theory) 基礎物理学研究所 2016/09/16
External funds, competitive funds and Grants-in-Aid for Scientific Research(kaken)
Type Position Title(Japanese) Title(English) Period

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Teaching subject(s)
Name(Japanese) Name(English) Term Department Period

School management (title, position)
Title Period

Faculty management (title, position)
Title Period

Organization name(Japanese) Organization name(English) Journal name(Japanese) Journal name(English) Title Period

Organization name Group name Title Period

Conference chair
Organization name Group name Date

Other activities (publications of introductry books)
Authors Title Publisher Date

The number of times you have accepted foreign long-term visitors
Visitor name Organization Department Research theme Country Period
Luca Lionni Kyoto University YITP Quantum gravity France 2018/03/26-
Dennis Obster Radboud University Quantum gravity The Netherlands 2017/02/24-2018/02/23
Saikat Mondal Indian Institute of Science Education and Research, Kolkata Quantum gravity India 2017/06/26-2017/08/01
Bernard Raffaelli Kyoto University YITP Quantum gravity France 2013/10/01-2014/01/26
Laurent Freidel Perimeter Institute Quantum gravity Canada 2012/05/01-2012/07/31
Simon Wolfel Bonn University Quantum gravity Germany 2010/04/01-2011/04/30