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Ryo Tamura


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Presentations
•  Invited talk
•  International conference
•  Others



Invited talk
4.*Ryo Tamura and Koji Hukushima,
"Estimation of effective models by machine learning",
International workshop on numerical methods and simulations for materials design and strongly correlated quantum matters, Oral, Hyogo, (March 2017).
3.*Ryo Tamura and Shu Tanaka,
"Toward an alternative method to quantum annealing - quest for new type of fluctuation -",
Summer Workshop on "Physics, Mathematics, And All That Quantum Jazz", Oral, Osaka, (August 2013).
2.*Ryo Tamura,
"A method to control order of phase transition: Invisible states in discrete spin models",
Symposium on Interface between Quantum Information and Statistical Physics, Oral, Osaka, (November 2011).
1.*Ryo Tamura and Naoki Kawashima,
"A 1st order transition in triangular lattice Heisenberg antiferromagnet - relation to the Z2 vortex Transition -",
International Workshop on Recent Developments on Phase Transition, Oral, Tokyo, (June 2011).

International conference
34.*Ryo Tamura and Koji Hukushima,
"Speeding up of the effective model estimation by machine learning",
The 2nd MANA Reunion Workshop 2018 , Oral, Ibaraki, (March 2018).
33.*Ryo Tamura and Koji Hukushima,
"Estimation of effective model for magnetic materials by machine learning",
MANA International Symposium 2018, Poster, Ibaraki, (March 2018).
I won "Excellent Poster Presentation Award" in this symposium.
32.*Ryo Tamura and Shu Tanaka,
"Clustering of artificially created data based on the Gaussian mixture model by quantum annealing",
Adiabatic Quantum Computing Conference 2017, Poster, Tokyo, (June 2017).
31.*Yoichiro Hashizume, Ryo Tamura, and Shu Tanaka,
"A construction method of initial Hamiltonian for singular value decomposition by quantum annealing",
Adiabatic Quantum Computing Conference 2017, Poster, Tokyo, (June 2017).
30.*Hitoshi Ishikawa, Yuichiro Minato, Shu Tanaka, and Ryo Tamura,
" A strategic scheme of quantum Monte Carlo implementation bringing out the potential in a supercomputer with many-core processors",
Adiabatic Quantum Computing Conference 2017, Poster, Tokyo, (June 2017).
29.*Ryo Tamura and Shu Tanaka,
"Application of quantum annealing for systems with multi-valued variable",
Adiabatic Quantum Computing Conference 2016, Poster, California, (June 2016).
28.*Yuichiro Minato, Shu Tanaka, and Ryo Tamura,
"The performance of quantum annealing depending on classical Hamiltonian representation - graph coloring problem -",
Adiabatic Quantum Computing Conference 2016, Poster, California, (June 2016).
27.*Yoichiro Hashizume, Shu Tanaka, and Ryo Tamura,
"Singular value decomposition analysis of fractal images by quantum annealing",
Adiabatic Quantum Computing Conference 2016, Poster, California, (June 2016).
26.*Ryo Tamura, Shu Tanaka, Takahisa Ohno, and Hideaki Kitazawa,
"Magnetic ordered structure dependence of magnetocaloric effect",
The International Chemical Congress of Pacific Basin Societies 2015, Oral, Hawaii, (December 2015).
25.*Shu Tanaka, Ryo Tamura, Kazuhiko Tanimoto, and Keisuke Totsuka,
"Multiple-q phases in a stacked triangular antiferromagnetic Heisenberg model with competing interactions under magnetic field",
The International Chemical Congress of Pacific Basin Societies 2015, Oral, Hawaii, (December 2015).
24.*Ryo Tamura and Shu Tanaka,
"Control of the nature of the phase transition in frustrated systems",
STAC-9 & TOEO-9, Oral, Ibaraki, (August 2015).
23.*Ryo Tamura and Shu Tanaka,
"A generalized Potts model with invisible states - toward applications to information science -",
New Horizons of Quantum and Classical Information 2015, Oral, Ibaraki, (October 2015).
22.*Shu Tanaka, Ryo Tamura, and Naoki Kawashima,
"Critical phenomena in two-dimensional frustrated Heisenberg models",
20th International Conference on Magnetism, Poster, Barcelona, (July 2015).
21.*Ryo Tamura, Shu Tanaka, Takahisa Ohno, and Hideaki Kitazawa,
"A new method for maximizing magnetic refrigeration efficiency in antiferromagnets",
20th International Conference on Magnetism, Poster, Barcelona, (July 2015).
20.*Ryo Tamura, Haruhiko Kuroe, and Masashi Hase,
"Theoretical study on huge magnetization plateau in Cu3Mo2O9",
MANA International Symposium 2015, Poster, Ibaraki, (March 2015).
19.*Saori Toyoizumi, Hideaki Kitazawa, Yukihiko Kawamura, Hiroaki Mamiya, Noriki Terada, Ryo Tamura, Andreas Dönni, Kengo Morita, and Akira Tamaki,
"Sample dependence of giant magnetocaloric effect in a cluster-glass system Ho5Pd2",
59th Annual Magnetism and Magnetic Materials (MMM) Conference, Poster, Hawaii, (November 2014).
18.*Ryo Tamura and Shu Tanaka,
"Spatial dimension dependence of first-order phase transition nature in stacked triangular lattice system",
International Conference on Highly Frustrated Magnetism 2014, Poster, Cambridge, (July 2014).
17.*Shu Tanaka, Ryo Tamura, and Naoki Kawashima,
"Second-order phase transition in two-dimensional frustrated systems",
International Conference on Highly Frustrated Magnetism 2014, Poster, Cambridge, (July 2014).
16.*Ryo Tamura, Takahisa Ohno, and Hideaki Kitazawa,
"Selection of magnetic structure suited for magnetic refrigeration material",
MANA International Symposium 2014, Poster, Ibaraki, (March 2014).
15.*Ryo Tamura, Shu Tanaka, Takahisa Ohno, and Hideaki Kitazawa,
"Magnetic structure dependence of magnetic refrigeration efficiency",
RIKEN-APW joint workshop "Highlights in condensed matter physics", Poster, Saitama, (January 2014).
14.*Shu Tanaka, Ryo Tamura, and Naoki Kawashima,
"Phase transition with discrete symmetry breaking in geometrically frustrated Heisenberg models",
RIKEN-APW joint workshop "Highlights in condensed matter physics", Poster, Saitama, (January 2014).
13.*Ryo Tamura, Shu Tanaka, and Naoki Kawashima,
"Second-order phase transition in Heisenberg model on triangular lattice with competing interactions",
XXV IUPAP International Conference on Statistical Physics (STATPHYS 25), Oral, Seoul, (July 2013).
12.*Ryo Tamura, Shu Tanaka, and Naoki Kawashima,
"Second-order phase transition in antiferromagnetic Heisenberg model on triangular lattice",
The 12th Asia Pacific Physics Conference of AAPPS (APPC12), Oral, Chiba, (July 2013).
11.*Ryo Tamura,
"Control of order of phase transition by distortion effect in frustrated spin system",
MANA International Symposium 2013, Poster, Ibaraki, (February 2013).
10.*Ryo Tamura, Shu Tanaka, Issei Sato, and Kenichi Kurihara,
"Quantum fluctuation and invisible fluctuation on the Potts model - application for quantum annealing -",
Dynamics and Manipulation of Quantum Systems 2010, Poster, Tokyo, (February 2011).
9.*Shu Tanaka and Ryo Tamura,
"Dynamical properties of Potts model with invisible states",
International Conference on Frustration in Condensed Matter, Poster, Miyagi, (January 2011).
8.*Ryo Tamura, Naoki Kawashima, Liis Seinberg, Takafumi Yamamoto, and Hiroshi Kageyama,
"Off-diagonal long-range order induced by random frustration - A Monte Carlo study of Sr(Fe{1-x}Mn{x})O2 -",
International Conference on Frustration in Condensed Matter, Poster, Miyagi, (January 2011).
7.*Shu Tanaka, Ryo Tamura, and Naoki Kawashima,
"Phase transition of generalized ferromagnetic Potts model - effect of invisible states -",
STATPHYS-Kolkata VII, Oral, Kolkata, (November 2010).
6.*Ryo Tamura, Shu Tanaka, and Naoki Kawashima,
"Extra degrees of freedom change the order of phase transition in Potts model",
Statistical Physics of Quantum Systems, Poster, Tokyo, (August 2010).
5.*Shu Tanaka, Ryo Tamura, Issei Sato, and Kenichi Kurihara,
"Quantum annealing - from a viewpoint of effect of some kind of fluctuation for Potts model -",
Kinki University Quantum Computing Series Summer School on Diversities in Quantum Computation/Information, Oral, Osaka, (August 2010).
4.*Shu Tanaka, Ryo Tamura, and Naoki Kawashima<,br> "Phase transition in Potts model with invisible states",
XXIV IUPAP International Conference on Statistical Physics, Oral, Cairns, (July 2010).
3.Ryo Tamura and *Naoki Kawashima,
"Rotational symmetry breaking in Heisenberg model on triangular lattice",
2009 APS March Meeting, Oral, Pittsburgh, (March 2009).
2.*Ryo Tamura and Naoki Kawashima,
"First-order transition to incommensurate phase with broken lattice rotation symmetry in frustrated continuous spin systems",
Supercomputing in Solid State Physics 2009, Poster, Chiba, (February 2009).
1.*Ryo Tamura and Naoki Kawashima,
"First-order transition to incommensurate phase with broken lattice rotation symmetry in frustrated Heisenberg model",
Novel Aspects of Phase Transitions with Long-range Interactions, Poster, Tokyo, (September 2008).

Others
9.*Ryo Tamura and Koji Hukushima,
"Estimation of spin-spin interactions from magnetization process based on the Bayesian statistics",
NIMS, ICYS Workshop 2016, Nagano, (January 2016).
8.*Ryo Tamura,
"Monte Carlo simulations to obtain physical properties of magnetic systems",
NIMS, The 175th ICYS Seminar, Ibaraki, (May 2015).
7.*Ryo Tamura,
"Magnetic refrigeration properties depending on magnetic structure",
NIMS, ICYS Workshop 2015, Fukushima, (January 2015).
6.*Ryo Tamura,
"Best suited protocol for applying magnetic field in magnetic refrigeration",
NIMS, The 396th MANA and the 158th ICYS Joint Seminar, Ibaraki, (April 2014).
5.*Ryo Tamura,
"Magnetic refrigeration using antiferromagnetic materials",
NIMS, ICYS Workshop 2014, Fukushima, (January 2014).
4.*Ryo Tamura,
"Interlayer interaction dependence of latent heat in frustrated spin systems",
NIMS, The 348th MANA and the 140th ICYS Joint Seminar, Ibaraki, (July 2013).
3.*Ryo Tamura,
"Change of the order of phase transition in spin system",
NIMS, ICYS Workshop FY2012, Ibaraki, (December 2012).
2.*Ryo Tamura,
"Control of order of phase transition by distortion effect in frustrated system",
NIMS, The 298th MANA and the 129th ICYS Joint Seminar, Ibaraki, (November 2012).
1.*Ryo Tamura,
"Random fan-out state induced by site-random interlayer couplings",
NIMS, The 255th MANA and the 112th ICYS Joint Seminar, Ibaraki, (April 2012).