Papers - TANAKA Shu

Advantages of Fixing Spins in Quantum Annealing

Hattori T., Irie H., Kadowaki T., Tanaka S.

Journal of the Physical Society of Japan 94 ( 1 )  2025.01

ISSN  00319015

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Quantum annealing can efficiently obtain solutions to combinatorial optimization problems. Size-reduction methods are used to treat large-scale combinatorial optimization problems that cannot be input directly into a quantum annealer because of its size limitation. Various size-reduction methods using fixing spins have been proposed as quantum-classical hybrid methods to obtain solutions. However, the high performance of these hybrid methods is yet to be clearly elucidated. In this study, we adopted a parameterized fixing spins method to verify the effects of fixing spins. The results revealed that setting the appropriate number of spins of the subproblem is crucial for obtaining a satisfactory solution, and the energy gap expansion is confirmed after fixing spins.

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Development of optimization method for truss structure by quantum annealing

Honda R., Endo K., Kaji T., Suzuki Y., Matsuda Y., Tanaka S., Muramatsu M.

Scientific Reports 14 ( 1 )  2024.12

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In this study, we developed a new method of topology optimization for truss structures by quantum annealing. To perform quantum annealing analysis with real variables, representation of real numbers as a sum of random number combinations is employed. The nodal displacement is expressed with binary variables. The Hamiltonian H is formulated on the basis of the elastic strain energy and position energy of a truss structure. It is confirmed that truss deformation analysis is possible by quantum annealing. For the analysis of the optimization method for the truss structure, the cross-sectional area of the truss is expressed with binary variables. The iterative calculation for the changes in displacement and cross-sectional area leads to the optimal structure under the prescribed boundary conditions.

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Novel real number representations in Ising machines and performance evaluation: Combinatorial random number sum and constant division

Endo K., Matsuda Y., Tanaka S., Muramatsu M.

PLoS ONE 19 ( 6 June )  2024.06

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Static and Dynamic Analysis of Energy Landscape Transformation of the Ising Problems

Kanai H., Tanaka S.

Proceedings - IEEE Quantum Week 2024, QCE 2024 2   374 - 375 2024

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Ising machines are promising next-generation computers that aim to efficiently obtain good solutions to combinatorial optimization problems, which are converted to the Ising model. To obtain the ground state of the Ising model with high accuracy, tuning the hyperparameters in the Ising model is of great importance. Recently, a new method called Energy Landscape Transformation of Ising Problems (ELTIP) has been proposed which does not change any of the original eigenenergies at all. The previous study demonstrated that the Time-to-Solution (TTS) of Quantum Annealing (QA) decreases for the specific problems after ELTIP. We reveal the scope of the problems where ELTIP can be sufficiently beneficial. To this end, we analyze the correlation between the mean Hamming distance and the ground state probability in both the static and dynamic analysis.

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Physical Properties of Error Reduction Algorithms for Ising Machines

Hino K., Tanaka S.

Proceedings - IEEE Quantum Week 2024, QCE 2024 2   434 - 435 2024

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Ising machines are expected to be dedicated computers that are capable of efficiently searching for good solutions to combinatorial optimization problems. When solving combinatorial optimization problems with an Ising machine, the objective function and constraints of the combinatorial optimization problems are expressed using the Ising model. Then, the low-energy states of the Ising model are searched by the internal algorithms of Ising machines. Typical internal algorithms are Simulated Annealing (SA) and Quantum Annealing (QA). Both algorithms exhibit stochastic behavior, so the final solution may contain errors. Therefore, it is an essential issue in the field of Ising machines to reduce errors as much as possible. A previous study proposed an error reduction method for QA machines, namely the Quantum Annealing Correction (QAC) model. This method reduces error by introducing penalty interaction and performing a specific decoding method. Building on these valuable insights, we proposed an alternative error reduction method, the stacked model. To verify the effectiveness, we examined on the relationship between the penalty interaction and the success probability of the QAC model and the stacked model on SA. The obtained results differ from the facts observed in QA. In summary, a decoding method different from the one considered effective in QA was found to be effective in SA. This result suggests that when considering an appropriate error reduction method, it is necessary to consider the internal algorithm of the Ising machine.

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Annealing-Assisted Column Generation for Inequality-Constrained Combinatorial Optimization Problems

Kanai H., Yamashita M., Tanahashi K., Tanaka S.

IEEE Access 12   157669 - 157685 2024

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Ising machines are expected to solve combinatorial optimization problems faster than the existing integer programming solvers. These problems, particularly those encountered in practical situations, typically involve inequality constraints. However, owing to the hardware limitations of the current Ising machines, solving combinatorial optimization problems with inequality constraints remains challenging. The Capacitated Vehicle Routing Problem (CVRP) is a typical example of a problem with inequality constraints. The CVRP is classified as NP-hard and, thus, is commonly solved using heuristic algorithms, such as column generation. Column generation attempts to iteratively generate only the promising routes, as the number of feasible routes increases exponentially. Within this framework, the CVRP is formulated as a set cover problem. The corresponding dual solutions are used to define the pricing subproblem, which is intended to create a new route. By applying Ising machines to this pricing subproblem, the overall computation time can be reduced. This study aims to solve combinatorial optimization problems with inequality constraints using a hybrid algorithm that combines column generation and Ising machines, thereby extending the applications of the latter. Additionally, we introduced limited column generation, wherein we fixed the decision variables to eliminate the overlap between the generated columns. By reducing unnecessary variables, our proposed method can overcome the hardware limitations where a small number of variables is available on real devices. We parameterize the difficulty of the inequality constraints and demonstrate that our annealing-assisted column generation can converge to a better lower bound.

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Quantum Annealing Optimization Method for the Design of Barrier Materials in Magnetic Tunnel Junctions

Nawa K., Suzuki T., Masuda K., Tanaka S., Miura Y.

Physical Review Applied 20 ( 2 )  2023.08

Research paper (scientific journal), Joint Work, Accepted

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Quantum-classical computational molecular design of deuterated high-efficiency OLED emitters

Qi Gao, Gavin O Jones, Takao Kobayashi, Michihiko Sugawara, Hiroki Yamashita, Hideaki Kawaguchi, Shu Tanaka, and Naoki Yamamoto

Intelligent Computing 2   0037 2023.06

Research paper (scientific journal), Joint Work, Accepted

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Quantum Annealing Boosts Prediction of Multimolecular Adsorption on Solid Surfaces Avoiding Combinatorial Explosion

Sampei H., Saegusa K., Chishima K., Higo T., Tanaka S., Yayama Y., Nakamura M., Kimura K., Sekine Y.

JACS Au 3 ( 4 ) 991 - 996 2023.04

Research paper (scientific journal), Joint Work, Accepted

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Quantum annealing and computation: Challenges and perspectives

Chakrabarti B.K., Leschke H., Ray P., Shirai T., Tanaka S.

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 381 ( 2241 )  2023.01

Research paper (scientific journal), Joint Work, Accepted,  ISSN  1364503X

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Hybrid Optimization Method Using Simulated-Annealing-Based Ising Machine and Quantum Annealer

Kikuchi S., Togawa N., Tanaka S.

Journal of the Physical Society of Japan 92 ( 12 )  2023

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00319015

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Dynamical Process of a Bit-Width Reduced Ising Model With Simulated Annealing

Kikuchi S., Togawa N., Tanaka S.

IEEE Access 11   95493 - 95506 2023

Research paper (scientific journal), Joint Work, Accepted

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An Ising-Machine-Based Solver of Vehicle Routing Problem With Balanced Pick-Up

Bao S., Tawada M., Tanaka S., Togawa N.

IEEE Transactions on Consumer Electronics 70 ( 1 ) 445 - 459 2023

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00983063

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A phase-field model by an Ising machine and its application to the phase-separation structure of a diblock polymer

Endo K., Matsuda Y., Tanaka S., Muramatsu M.

Scientific Reports 12 ( 1 )  2022.12

Research paper (scientific journal), Joint Work, Accepted

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Towards optimization of photonic-crystal surface-emitting lasers via quantum annealing

Inoue T., Seki Y., Tanaka S., Togawa N., Ishizaki K., Noda S.

Optics Express 30 ( 24 ) 43503 - 43512 2022.11

Research paper (scientific journal), Joint Work, Accepted

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Continuous black-box optimization with an Ising machine and random subspace coding

Izawa S., Kitai K., Tanaka S., Tamura R., Tsuda K.

Physical Review Research 4 ( 2 )  2022.06

Research paper (scientific journal), Joint Work, Accepted,  ISSN  26431564

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PyQUBO: Python Library for Mapping Combinatorial Optimization Problems to QUBO Form

Zaman M., Tanahashi K., Tanaka S.

IEEE Transactions on Computers 71 ( 4 ) 838 - 850 2022.04

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00189340

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Multi-day Travel Planning Using Ising Machines for Real-world Applications

Bao S., Tawada M., Tanaka S., Togawa N.

IEEE Conference on Intelligent Transportation Systems, Proceedings, ITSC 2021-September   3704 - 3709 2021.09

Research paper (international conference proceedings), Joint Work, Accepted

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An Approach to the Vehicle Routing Problem with Balanced Pick-up Using Ising Machines

Bao S., Tawada M., Tanaka S., Togawa N.

2021 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2021 - Proceedings  2021.04

Research paper (international conference proceedings), Joint Work, Accepted

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Mapping induced subgraph isomorphism problems to ising models and its evaluations by an ising machine

Yoshimura N., Tawada M., Tanaka S., Arai J., Yagi S., Uchiyama H., Togawa N.

IEICE Transactions on Information and Systems E104.D ( 4 ) 481 - 489 2021.04

Research paper (scientific journal), Joint Work, Accepted,  ISSN  09168532

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Solving constrained slot placement problems using an ising machine and its evaluations

Kanamaru S., Kawamura K., Tanaka S., Tomita Y., Togawa N.

IEICE Transactions on Information and Systems E104D ( 2 ) 226 - 236 2021.02

Research paper (scientific journal), Joint Work, Accepted,  ISSN  09168532

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Visiting-Route Recommendation in Amusement Parks and its Evaluations by an Ising Machine

Mukasa Y., Wakaizumi T., Tanaka S., Togawa N.

Digest of Technical Papers - IEEE International Conference on Consumer Electronics 2021-January 2021.01

Research paper (international conference proceedings), Joint Work, Accepted

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Performance comparison of typical binary-integer encodings in an Ising machine

Tamura K., Shirai T., Katsura H., Tanaka S., Togawa N.

IEEE Access 9   81032 - 81039 2021

Research paper (scientific journal), Joint Work, Accepted

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Exact bounds for dynamical critical exponents of transverse-field Ising chains with a correlated disorder

Shirai T., Tanaka S.

Annals of Physics 435 2021

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00034916

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Experimental evaluations of parallel tempering on an ising machine

Mukasa Y., Tanaka S., Togawa N.

IPSJ Transactions on System LSI Design Methodology 14   27 - 29 2021

Research paper (scientific journal), Joint Work, Accepted

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An ising machine-based solver for visiting-route recommendation problems in amusement parks

MUKASA Y., WAKAIZUMI T., TANAKA S., TOGAWA N.

IEICE Transactions on Information and Systems E104D ( 10 ) 1592 - 1600 2021

Research paper (scientific journal), Joint Work, Accepted,  ISSN  09168532

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Designing Metamaterials with Quantum Annealing and Factorization Machines

Kitai K., Guo J., Ju S., Tanaka S., Tsuda K., Shiomi J., Tamura R.

Physical Review Research 2   013319-1 - 013319-10 2020.03

Research paper (scientific journal), Joint Work, Accepted

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A new LDPC code decoding method: Expanding the scope of ising machines

Tawada M., Tanaka S., Togawa N.

Digest of Technical Papers - IEEE International Conference on Consumer Electronics 2020-January 2020.01

Research paper (international conference proceedings), Joint Work, Accepted

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Theory of Ising Machines and a Common Software Platform for Ising Machines

Tanaka S., Matsuda Y., Togawa N.

Proceedings of 25th Asia and South Pacific Design Automation Conference (ASP-DAC 2020) 9C-1 2020-January   659 - 666 2020

Research paper (international conference proceedings), Joint Work, Accepted

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Guiding Principle for Minor-Embedding in Simulated-Annealing-Based Ising Machines

Shirai T., Tanaka S., Togawa N.

IEEE Access 8   210490 - 210502 2020

Research paper (scientific journal), Joint Work, Accepted

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How to Reduce the Bit-width of an Ising Model by Adding Auxiliary Spins

Oku D., Tawada M., Tanaka S., Togawa N.

IEEE Transactions on Computers 71 ( 1 ) 223 - 234 2020

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00189340

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イジングモデルによる類似誘導部分グラフ同型問題の解法

吉村 夏一、多和田 雅師、田中 宗、新井 淳也、徳 礪、八木 哲志、内山 寛之、戸川 望

研究報告システムとLSIの設計技術（SLDM） 2019-SLDM-189   1 - 6 2019.11

Research paper (conference, symposium, etc.), Joint Work

Efficient ising model mapping for induced subgraph isomorphism problems using ising machines

Yoshimura N., Tawada M., Tanaka S., Arai J., Yagi S., Uchiyama H., Togawa N.

IEEE International Conference on Consumer Electronics - Berlin, ICCE-Berlin 2019-September   227 - 232 2019.09

Research paper (international conference proceedings), Joint Work, Accepted

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Mapping constrained slot-placement problems to ising models and its evaluations by an ising machine

Kanamaru S., Kawamura K., Tanaka S., Tomita Y., Matsuoka H., Kawamura K., Togawai N.

IEEE International Conference on Consumer Electronics - Berlin, ICCE-Berlin 2019-September   221 - 226 2019.09

Research paper (international conference proceedings), Joint Work, Accepted

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A multiple coefficients trial method to solve combinatorial optimization problems for simulated-annealing-based ising machines

Takehara K., Oku D., Matsuda Y., Tanaka S., Togawa N.

IEEE International Conference on Consumer Electronics - Berlin, ICCE-Berlin 2019-September   64 - 69 2019.09

Research paper (international conference proceedings), Joint Work, Accepted

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Application of Ising Machines and a Software Development for Ising Machines

Kotaro Tanahashi, Shinichi Takayanagi, Tomomitsu Motohashi, and Shu Tanaka

Journal of the Physical Society of Japan 88 ( 6 ) 061010-1 - 061010-10 2019.05

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00319015

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Quantum Phase Transition in Fully Connected Quantum Wajnflasz–Pick Model

Yuya Seki, Shu Tanaka, and Shiro Kawabata

Journal of the Physical Society of Japan 88 ( 5 ) 054006-1 - 054006-12 2019.04

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00319015

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SAベースのイジングマシンにより巡回セールスマン問題を高速解法するための多種軽量係数試行法

竹原 康太、於久 太祐、松田 佳希、田中 宗、戸川 望

研究報告組込みシステム（EMB） 2019-EMB-50   1 - 6 2019.03

Research paper (conference, symposium, etc.), Joint Work

Efficient Ising Model Mapping to Solving Slot Placement Problem

Sho Kanamaru, Daisuke Oku, Masashi Tawada, Shu Tanaka, Masato Hayashi, Masanao Yamaoka, Masao Yanagisawa, Nozomu Togawa

2019 IEEE International Conference on Consumer Electronics (ICCE)    1 - 6 2019.03

Research paper (international conference proceedings), Joint Work, Accepted

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A Fully-Connected Ising Model Embedding Method and Its Evaluation for CMOS Annealing Machines

Daisuke Oku, Kotaro Terada, Masato Hayashi, Masanao Yamaoka, Shu Tanaka, and Nozomu Togawa

IEICE Transactions on Information and Systems E102.D ( 9 ) 1696 - 1706 2019

Research paper (scientific journal), Joint Work, Accepted,  ISSN  09168532

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実イジング計算機による制約付きスロット配置問題の解法

金丸 翔、川村 一志、田中 宗、戸川 望

研究報告システム・アーキテクチャ（ARC） 2019-ARC-235   1 - 6 2019

Research paper (conference, symposium, etc.), Joint Work

An Ising Model Mapping to Solve Rectangle Packing Problem

Kotaro Terada, Daisuke Oku, Sho Kanamaru, Shu Tanaka, Masato Hayashi, Masanao Yamaoka, Masao Yanagisawa, Nozomu Togawa

2018 International Symposium on VLSI Design, Automation and Test (VLSI-DAT)    1 - 4 2018.06

Research paper (international conference proceedings), Joint Work, Accepted

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イジング計算機によるスロット配置問題の解法

金丸 翔、於久 太祐、多和田 雅師、田中 宗、林 真人、山岡 雅直、柳澤 政生、戸川 望

電子情報通信学会技術研究報告 IEICE technical report: 信学技報 118 ( 82 ) 161 - 166 2018

Research paper (conference, symposium, etc.), Joint Work

断熱量子コンピューティングによる巡回セールスマン問題の解法

中原 幹夫、坂東 将光、田中 宗

近畿大学理工学総合研究所研究報告 29   1 - 9 2017.02

Research paper (conference, symposium, etc.), Joint Work

Applicability of Scaling Behavior and Power Laws in the Analysis of the Magnetocaloric Effect in Second-Order Phase Transition Materials

Carlos Romero-Muñiz, Ryo Tamura, Shu Tanaka, and Victorino Franco

Physical Review B 94   134401-1 - 134401-13 2016.10

Research paper (scientific journal), Joint Work, Accepted

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Topological and Dynamical Properties of a Generalized Cluster Model in One Dimension

Takumi Ohta, Shu Tanaka, Ippei Danshita, and Keisuke Totsuka

Physical Review B 93   165423-1 - 165423-16 2016.04

Research paper (scientific journal), Joint Work, Accepted

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Phase Diagram and Sweep Dynamics of a One-Dimensional Generalized Cluster Model

Takumi Ohta, Shu Tanaka, Ippei Danshita, and Keisuke Totsuka

Journal of the Physical Society of Japan 84   063001-1 - 063001-4 2015.05

Research paper (scientific journal), Joint Work, Accepted

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量子アニーリング法を用いたクラスタ分析

田中 宗、佐藤 一誠、栗原 賢一、宮下 精二、中川 裕志

第32回量子情報技術研究会資料    25 - 28 2015

Research paper (conference, symposium, etc.), Joint Work

Structural Phase Transition between γ-Ti3O5 and δ-Ti3O5 by Breaking of One-Dimensionally Conducting Pathway

Kenji Tanaka, Tomomichi Nasu, Yasuto Miyamoto, Noriaki Ozaki, Shu Tanaka, Toshiaki Nagata, Fumiyoshi Hakoe, Marie Yoshikiyo, Kosuke Nakagawa, Yoshikazu Umeta, Kenta Imoto, Hiroko Tokoro, Asuka Namai, and Shin-ichi Ohkoshi

Crystal Growth and Design 15   653 - 657 2014.12

Research paper (scientific journal), Joint Work, Accepted

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Magnetic Ordered Structure Dependence of Magnetic Refrigeration Efficiency

Ryo Tamura, Shu Tanaka, Takahisa Ohno, and Hideaki Kitazawa

Journal of Applied Physics 116   053908-1 - 053908-12 2014.07

Research paper (scientific journal), Joint Work, Accepted

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Entanglement Properties of a Quantum Lattice-Gas Model on Square and Triangular Ladders

Shu Tanaka, Ryo Tamura, and Hosho Katsura

Kinki University Series on Quantum Computing 9   71 - 88 2014

Research paper (international conference proceedings), Joint Work

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A Method to Change Phase Transition Nature — Toward Annealing Method —

Ryo Tamura and Shu Tanaka

Kinki University Series on Quantum Computing 9   135 - 161 2014

Research paper (international conference proceedings), Joint Work

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Quantum Annealing for Dirichlet Process Mixture Models with Applications to Network Clustering

Issei Sato, Shu Tanaka, Kenichi Kurihara, Seiji Miyashita, and Hiroshi Nakagawa

Neurocomputing 121   523 - 531 2013.12

Research paper (scientific journal), Joint Work, Accepted

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Interlayer-Interaction Dependence of Latent Heat in the Heisenberg Model on a Stacked Triangular Lattice with Competing Interactions

Ryo Tamura and Shu Tanaka

Physical Review E 88   052138-1 - 052138-9 2013.11

Research paper (scientific journal), Joint Work, Accepted

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Phase Transitions with Discrete Symmetry Breaking in Antiferromagnetic Heisenberg Models on a Triangular Lattice

Ryo Tamura, Shu Tanaka, and Naoki Kawashima

JPS Conference Proceedings 1   012125-1 - 012125-5 2013.07

Research paper (scientific journal), Joint Work, Accepted

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Second-Order Phase Transition in Heisenberg Model on Triangular Lattice with Competing Interactions

Ryo Tamura, Shu Tanaka, and Naoki Kawashima

Physical Review B 87   214401-1 - 214401-5 2013.06

Research paper (scientific journal), Joint Work, Accepted

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Network-Growth Rule Dependence of Fractal Dimension of Percolation Cluster on Square Lattice

Shu Tanaka and Ryo Tamura

Journal of the Physical Society of Japan 82   053002-1 - 053002-5 2013.04

Research paper (scientific journal), Joint Work, Accepted

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Two-Dimensional Octacyano-Bridged Mn(II)-Nb(IV) Bimetal Assembly with Four Different Configurations of 3-Hydroxypyridines

Daisuke Takahashi, Koji Nakabayashi, Shu Tanaka, and Shin-ichi Ohkoshi

Inorganic Chemistry Communications 27   47 - 50 2013.01

Research paper (scientific journal), Joint Work, Accepted

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A Useful Way to Obtain the Central Charge of Entanglement Hamiltonian — Nested Entanglement Entropy —

Shu Tanaka

Interdisciplinary Information Sciences 19   101 - 105 2013

Research paper (scientific journal), Single Work, Accepted

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Entanglement Spectra of the Quantum Hard-Square Model: Holographic Minimal Models

Shu Tanaka, Ryo Tamura, and Hosho Katsura

Physical Review A 86   032326-1 - 032326-9 2012.09

Research paper (scientific journal), Joint Work, Accepted

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統計的機械学習における量子アニーリング

佐藤 一誠、田中 宗、栗原 賢一、宮下 精二、中川 裕志

基礎物理学研究所研究会：情報統計力学の最前線 –情報と揺らぎの制御を目指して– 会議録  2012.03

Research paper (conference, symposium, etc.), Joint Work

量子ビット間の相互作用推定手法

田中 宗

基礎物理学研究所研究会：情報統計力学の最前線 –情報と揺らぎの制御を目指して– 会議録  2012.03

Research paper (conference, symposium, etc.), Single Work

新奇揺らぎの導入による相転移現象の制御

田村 亮、田中 宗

基礎物理学研究所研究会：情報統計力学の最前線 –情報と揺らぎの制御を目指して– 会議録  2012.03

Research paper (conference, symposium, etc.), Joint Work

Hamiltonian Identification for a 3-Spin Chain

Mohammad Ali Fasihi、田中 宗、中原 幹夫、近藤 康

素粒子論研究 119 ( 4A ) D76 - D86 2012

Research paper (conference, symposium, etc.), Joint Work

Quantum Annealing and Quantum Fluctuation Effect in Frustrated Ising Systems

Shu Tanaka and Ryo Tamura

Kinki University Series on Quantum Computing 7   241 - 261 2012

Research paper (international conference proceedings), Joint Work

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A Method to Control Order of Phase Transition: Invisible States in Discrete Spin Models

Ryo Tamura, Shu Tanaka, and Naoki Kawashima

Kinki University Series on Quantum Computing 7   217 - 238 2012

Research paper (international conference proceedings), Joint Work

Microscopic Properties of Quantum Annealing — Application to Fully Frustrated Ising Systems —

Shu Tanaka

Kinki University Series on Quantum Computing 6   93 - 103 2012

Research paper (international conference proceedings), Single Work

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Hamiltonian Determination through Edge Spin in Transverse Ising Chain

Mohammad Ali Fasihi, Shu Tanaka, Mikio Nakahara, and Yasushi Kondo

Kinki University Series on Quantum Computing 6   113 - 122 2012

Research paper (international conference proceedings), Joint Work

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Hybrid Quantum Annealing for Clustering Problems

Shu Tanaka, Ryo Tamura, Issei Sato, and Kenichi Kurihara

Kinki University Series on Quantum Computing 5   169 - 192 2012

Research paper (international conference proceedings), Joint Work

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Weak Measurement によるスピン相互作用の推定

田中 宗、鹿野 豊

素粒子論研究 119 ( 4A ) D127 - D135 2012

Research paper (conference, symposium, etc.), Joint Work

Entanglement Spectra of the Two-Dimensional Affleck-Kennedy-Lieb-Tasaki Model: Correspondence between the Valence-Bond-Solid State and Conformal Field Theory

Jie Lou, Shu Tanaka, Hosho Katsura, and Naoki Kawashima

Physical Review B 84   245128-1 - 245128-9 2011.11

Research paper (scientific journal), Joint Work, Accepted

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Estimation of Spin-Spin Interaction by Weak Measurement Scheme

Yutaka Shikano and Shu Tanaka

Europhysics Letters 96   40002-1 - 40002-5 2011.11

Research paper (scientific journal), Joint Work, Accepted

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Hyperfine Interaction Estimation in Nitrogen Vacancy Center in Diamond Using Weak Values

Yutaka Shikano, Sota Kagami, Shu Tanaka, and Akio Hosoya

AIP Conference Proceedings 1363   177 - 180 2011.10

Research paper (international conference proceedings), Joint Work, Accepted

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Dynamic Properties of Potts Model with Invisible States

Shu Tanaka and Ryo Tamura

Journal of Physics: Conference Series 320   012025-1 - 012025-6 2011.09

Research paper (scientific journal), Joint Work, Accepted

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量子アニーリングにおける無限混合モデルの並列最適化

佐藤 一誠、栗原 賢一、田中 宗、宮下 精二、中川 裕志

電子情報通信学会技術研究報告 IBISML, 情報論的学習理論と機械学習, 111 ( 87 ) 111 - 117 2011.06

Research paper (conference, symposium, etc.), Joint Work

Phase Transition of Generalized Ferromagnetic Potts Model — Effect of Invisible States —

Shu Tanaka, Ryo Tamura, and Naoki Kawashima

Journal of Physics: Conference Series 297   012022-1 - 012022-7 2011.05

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Successive Phase Transitions and Phase Diagrams of the Quasi-Two-Dimensional Triangular Antiferromagnet Rb4Mn(MoO4)3

Rieko Ishii, Shu Tanaka, Keisuke Onuma, Yusuke Nambu, Masashi Tokunaga, Toshiro Sakakibara, Naoki Kawashima, Yoshiteru Maeno, Collin Broholm, Dixie P. Gartreaux, Julia Y. Chan, and Satoru Nakatsuji

Europhysics Letters 94   17001-1 - 17001-5 2011.03

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Hamiltonian Determination with Restricted Access in Transverse Field Ising Chain

Mohammad Ali Fasihi, Shu Tanaka, Mikio Nakahara, and Yasushi Kondo

Journal of the Physical Society of Japan 80   044002-1 - 044002-7 2011.03

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Quantum Field Induced Orderings in Fully Frustrated Ising Spin Systems

Shu Tanaka, Masaki Hirano, and Seiji Miyashita

Physica E 43   766 - 768 2011.01

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Phase Transition in Potts Model with Invisible States

Ryo Tamura, Shu Tanaka, and Naoki Kawashima

Progress of Theoretical Physics 124   381 - 388 2010.08

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Non-Monotonic Dynamics in Frustrated Ising Model with Time-Dependent Transverse Field

Shu Tanaka and Seiji Miyashita

Physical Review E 81   051138-1 - 051138-8 2010.05

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Entanglement in Valence-Bond-Solid States on Symmetric Graphs

Hosho Katsura, Naoki Kawashima, Anatol N. Kirillov, Vladimir E. Korepin, and Shu Tanaka

Journal of Physics A: Mathematical and Theoretical 43   255303-1 - 255303-28 2010.05

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Mechanism of Slow Relaxation due to Screening Effect in a Frustrated System

Shu Tanaka and Seiji Miyashita

Journal of the Physical Society of Japan 78   084002-1 - 084002-7 2009.08

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Quantum Response to Time-Dependent External Field

Seiji Miyashita, Shu Tanaka, Hans De Raedt, and Bernard Barbara

Journal of Physics: Conference Series 143   012005-1 - 012005-10 2009.01

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

量子アニーリング法を用いたクラスタ分析

田中 宗、栗原 賢一、宮下 精二

科研費特定領域研究「情報統計力学の深化と展開」 研究会「情報統計力学の広がり: 量子・画像・そして展開」講演概要集  2009

Research paper (conference, symposium, etc.), Joint Work

Quantum Annealing for Variational Bayes Inference

Issei Sato, Kenichi Kurihara, Shu Tanaka, Hiroshi Nakagawa, and Seiji Miyashita

Proceedings of the 25th Conference on Uncertainty in Artificial Intelligence  2009

Research paper (international conference proceedings), Joint Work, Accepted

Quantum Annealing for Clustering

Kenichi Kurihara, Shu Tanaka, and Seiji Miyashita

Proceedings of the 25th Conference on Uncertainty in Artificial Intelligence  2009

Research paper (international conference proceedings), Joint Work, Accepted

Non-Monotonic Relaxation in Systems with Reentrant Type Interaction

Seiji Miyashita, Shu Tanaka, and Masaki Hirano

Journal of the Physical Society of Japan 76   083001-1 - 083001-4 2007.08

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Slow Relaxation of Spin Structure in Exotic Ferromagnetic Phase of Ising-Like Heisenberg Kagome Antiferromagnets

Shu Tanaka and Seiji Miyashita

Journal of the Physical Society of Japan 76   103001-1 - 103001-4 2007.08

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Slow Relaxation Process in Ising like Heisenberg Kagome Antiferromagnets due to Macroscopic Degeneracy in the Ordered State

Shu Tanaka and Seiji Miyashita

Journal of Physics: Condensed Matter 19   145256-1 - 145256-5 2007.03

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Quantum Annealing Effect on Entropic Slowing Down in Frustrated Decorated Bond System

Shu Tanaka and Seiji Miyashita

Journal of Magnetism and Magnetic Materials 310   e468 - e470 2007.03

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Electron Localization or Delocalization in Incommensurate Helical Magnets

Shu Tanaka, Hosho Katsura, and Naoto Nagaosa

Physical Review Letters 97   116404-1 - 116404-4 2006.09

Research paper (scientific journal), Joint Work, Accepted

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フラストレートスピン系におけるリエントラント転移の動的特性

田中　宗

物性研究 85 ( 4 ) 523 - 551 2006.01

Research paper (scientific journal), Single Work, Accepted

Dynamical Properties of Temperature Chaos and Memory Effect

Shu Tanaka and Seiji Miyashita

Progress of Theoretical Physics Supplement 157   34 - 37 2005.01

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)