| 2024 |
| 1. |
Ferromagnetic instability for the SU(N) Hubbard model
SU(N) physics in quantum many-body systems: theory, experiment, and numerics "SUN2024"
2024/7/8-12, Sendai
J. Fujii and A. Koga |
| 2. |
Majorana-mediated spin transport in the Kitaev model at finite temperatures
Internaltional Symposium on Quantum Electronics "TSQS2024"
2024/2/13-16, Ito International Research Center,Tokyo
A. Koga |
| 2023 |
| 3. |
Hyperuniformity in the two-dimensional periodic and quasiperiodic lattices
International conference on complex orders in condensed matter: aperiodic order, local order, electronic order, hidden order
2023/9/24-29, Evian, France
A. Koga, and S. Sakai |
| 4. |
Hyperuniformity in the two-dimensional periodic and quasiperiodic lattices
Ihe 15th International Conference on Quasicrystals (ICQ15)
2023/6/18-26, Tel Aviv, Israel
A. Koga, and S. Sakai |
| 5. |
Hexagonal metallic-mean tilings as aperiodic approximants of the honeycomb lattice
Ihe 15th International Conference on Quasicrystals (ICQ15)
2023/6/18-26, Tel Aviv, Israel
T. Matsubara, A. Koga, and T. Dotera |
| 2022 |
| 6. |
Majorana-mediated spin transport in the S=1/2 Kitaev model at finite temperatures
International Conference on Strongly Correlated Electron Systems (SCES2022)
2022/7/24-29, Amsterdam, The Netherlands
H. Taguchi, Y. Murakami, and A. Koga |
| 7. |
Majorana-mediated spin transport in the S=1/2 Kitaev model at finite temperatures
11th International Conference on Highly Frustrated Magnetism 2022 (HFM22)
2022/6/20-25, Paris, France
A. Koga |
| 8. |
A 6-fold golden-mean tiling with four tiles
10th International Conference on Aperiodic Crystals (APERIODIC2022)
2022/6/20-24, Sapporo, Japan
S. Coates, T. Matsubara, A.Koga |
| 2019 |
| 9. |
Ferromagnetic Instability for the Single-band Hubbard Model in the Strong-Coupling Regime
14th Asia-Pacific Physics Conference (APPC2019)
2019/11/17-21, Borneo Convention Centre Kuching, Malaysia
A. Koga |
| 10. |
Low-temperature Properties of the generalized Kitaev Model
International Conference on Strongly Correlated Electron Systems (SCES2019)
2019/9/23-28, Okayama, Japan
A. Koga |
| 2018 |
| 11. |
Ground-state and Finite-temperature Properties of the Bilayer Kitaev model
International Conference on Highly Frustrated Magnetism 2018 (HFM2018)
2018/7/10-14, UC Davis, US
H. Tomishige, J. Nasu, A. Koga |
| 12. |
Ground-state and Finite-temperature Properties of the Bilayer Kitaev model
The 6th International Conference on Superconductivity and Magnetism (ICSM2018)
2018/4/29-5/4, Beldibi/Antalya, Turkey
A. Koga, H. Tomishige, and J. Nasu |
| 2017 |
| 13. |
Role of the spin-orbit coupling in the Kugel-Khomskii model on the honeycomb lattice
Inter-institutional meeting in Interdisciplinary Theoretical and Computational Physical Science (ITCPS2017)
2017/10/4-6, Tokyo Institute of Technology, Tokyo
A. Koga |
| 14. |
Role of the spin-orbit coupling in the Kugel-Khomskii model on the honeycomb lattice
J-Physics 2017: International Workshop on Multipole Physics and Related Phenomena
2017/9/24-28, Hachimantai, Iwate
A. Koga, S. Nakauchi, and J. Nasu |
| 15. |
Magnetic properties in the Penrose-Hubbard model
28th International Conference on Low Temperature Physics (LT28)
2017/8/9-16, Gothenburg, Sweden
A. Koga and H. Tsunetsugu |
| 16. |
Ground-state phase diagram in the Kugel-Khomskii model with finite spin-orbit interactions
International Conference on Strongly Correlated Electron Systems (SCES2017)
2017/7/17-21, Prague, Czech
A. Koga, S. Nakauchi, and J. Nasu |
| 17. |
Ground-state phase diagram in the Kugel-Khomskii model with finite spin-orbit interactions
International Conference on Topological Materials Science 2017 (TopoMat2017)
2017/5/9-13, Tokyo Institute of Technology, Japan
A. Koga, S. Nakauchi, and J. Nasu |
| 2015 |
| 18. |
Superconductivity in the degenerate Hubbard model
TMU International Symposium 2015 "New Quantum Phases Emerging from Novel Crystal Structure"
2015/9/24-25, Tokyo Metropolitan University, Japan
A. Koga |
| 2013 |
| 19. |
Nonequilibrium transport through a quantum dot coupled to normal and superconducting leads
The International Conference on Strongly Correlated Electron Systems (SCES13)
2013/8/5-9, Tokyo, Japan
A. Koga |
| 20. |
Valence Fluctuations in the Extended Periodic Anderson Model at Finite Temperatures
The 12th Asia Pacific Physics Conference (APPC12)
2013/7/14-19, Chiba, Japan
Y. Kojima and A. Koga |
| 21. |
Transport properties through a quantum dot coupled to normal and superconducting leads
The New Generation in Strongly Correlated Electron Systems (NGSCES2013)
2013/7/1-5, Sestri Levante, Italy
A. Koga |
| 22. |
Transport properties through a quantum dot coupled to normal and superconducting lead
International Conference Optical and Electrical Spectroscopy of Single Quantum Dots (SQD13)
2013/3/10-12, Mallorca, Spain
A. Koga |
| 2012 |
| 23. |
Transport properties through a quantum dot coupled to normal and superconducting leads
International Symposium Nanoscience and Quantum Physics (nanoPHYS'12)
2012/12/17-19, Tokyo, Japan
A. Koga |
| 24. |
Metal-Insulator transition in optical lattice system with site-dependent interactions
International Conference on Superconductivity and Magnetism (ICSM 2012)
2012/4/29-5/4, Istanbul, Turkey
A. Koga, T. Saitou, and A. Yamamoto |
| 2011 |
| 25. |
Superfluid state in the periodic Anderson model with attractive interactions
International Conference on Strongly Correlated Electron Systems (SCES 2011)
2011/8/29-9/3, Cambridge, UK
A. Koga and P. Werner |
| 26. |
Superfluid state in the periodic Anderson model with attractive interactions
International Symposium Nanoscience and Quantum Physics "nanoPHYS'11"
2011/1/26-28, Tokyo, Japan
A. Koga |
| 2010 |
| 27. |
Polarized superfluid state in a fermionic optical lattice
International Conference on Frustrated Spin Systems, Cold Atoms, Nanomaterials
2010/7/14-16, Hanoi, Vietnam
A. Koga and P. Werner |
| 28. |
Polarized superfluid state in a fermionic optical lattice
International Conference on Strongly Correlated Electron Systems (SCES 2010)
2010/6/27-7/2, Santa Fe, USA
A. Koga and P. Werner |
| 2009 |
| 29. |
Phase Transitions in the Half-filled Hubbard Model on the Triangular Lattice
The 8th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets (ISCOM2009) "The 64th Yamada Conference"
2009/9/12-17, Niseko, Japan
T. Yoshioka, A. Koga, and N. Kawakami |
| 30. |
Analysis of Superfluid State of Ultracold Fermions with Attractive Interactions in Two-dimensional Optical Lattices
9th International Conference on Materials and Mechanisms of Superconductivity (M2S-IX)
2009/9/7-12, Tokyo, Japan
Y. Fujihara, A. Koga, and N. Kawakami |
| 31. |
Quantum phase transitions in the Hubbard model on the triangular lattice
Quantum Criticality & Novel Phases (QCNP2009)
2009/8/2-5, Dresden, Germany
T. Yoshioka, A. Koga, and N. Kawakami |
| 2008 |
| 32. |
Supersolid state in a fermionic optical lattice system
The 25th International Conference on Low Temperature Physics (LT25)
2008/8/7-13, Amsterdam, Netherlands
A. Koga, T. Higashiyama, K. Inaba, S. Suga, and N. Kawakami |
| 2007 |
| 33. |
Phase transitions in the extended periodic Anderson model
The International Conference on Strongly Correlated Electron Systems (SCES2007)
2007/5/13-18, Houston, USA
A. Koga, N. Kawakami, R. Peters, and Th. Pruschke |
| 2006 |
| 34. |
Mott transitions in the Hubbard model on the planar pyrochlore lattice
International Conference on Magnetism
2006/8/20-25, Kyoto, Japan
A. Koga, T. Yoshioka, N. Kawakami, and H. Yokoyama |
| 35. |
Electron correlations in the Hubbard model on the planar pyrochlore lattice
8th International Conference on Materials and Mechanisms of Superconductivity and High-Temperature Superconductor
2006/7/9-14, Dresden, Germany
A. Koga, T. Yoshioka, N. Kawakami and H. Yokoyama |
| 2005 |
| 36. |
Variational Monte Carlo Study of Two Dimensional Multi-Orbital Hubbard Model
The 24th International Conference on Low Temperature Physics (LT24)
2005/8/10-17, Orlando, Florida, USA
A. Koga, N. Kawakami, H. Yokoyama, and K. Kobayashi |
| 2004 |
| 37. |
Mott transitions in the multiorbital systems
The international conference on Strongly Correlated Electron Systems (SCES 2004)
2004/7/26-30, Karlsruhe, Germany
A. Koga, N. Kawakami, T.M. Rice, and M. Sigrist |
| 2002 |
| 38. |
Effects of degenerate orbitals on the Anderson lattice model
The 3rd International Symposium on Advanced Science Research (ASR2002) "Advances in the Physics of f-electron systems"
2002/11/12-14, JAERI Tokai, Ibaraki
A. Koga and N. Kawakami |
| 39. |
Quantum phase transitions in a frustrated orthogonal-dimer S=1 spin system
The 23rd International Conference on Low Temperature Physics (LT23)
2002/8/20-27, International Conference Center, Hiroshima
A. Koga and N. Kawakami |
| 2001 |
| 40. |
Hole-doping effects on a S=1 ladder system
The international conference on Strongly Correlated Electron System (SCES 2001)
2001/8/6-10, Ann Arbor, Michigan, USA
A. Koga, N. Kawakami and M. Sigrist |
| 2000 |
| 41. |
Quantum phase transitions for the three-dimensional orthogonal-dimer spin system
Conference on Computational Physics 2000 (CCP2000) "New Challenges for the New Millennium"
2000/12/3-8, Gold Coast, Queensland, Australia
A. Koga and N. Kawakami |
