@book{CTT100713967,
  author = {古賀 昌久},
  title = {物理数学 I 複素関数・ベクトル解析},
  publisher = {丸善出版},
  year = 2016,
}

@article{CTT100918452,
  author = {Toranosuke Matsubara and Akihisa Koga and Atsushi Takano and Yushu Matsushita and Tomonari Dotera},
  title = {Aperiodic approximants bridging quasicrystals and modulated structures},
  journal = {Nature Communications},
  year = 2024,
}

@article{CTT100918453,
  author = {Akihisa Koga and Shiro Sakai},
  title = {Hyperuniformity in two-dimensional periodic and quasiperiodic point patterns},
  journal = {Physical Review E},
  year = 2024,
}

@article{CTT100920964,
  author = {Soma Takemori and Kazuki Yamamoto and Akihisa Koga},
  title = {Theory of non-Hermitian fermionic superfluidity on a honeycomb lattice: Interplay between exceptional manifolds and Van Hove singularity},
  journal = {Physical Review B},
  year = 2024,
}

@article{CTT100918450,
  author = {Yuta Murakami and Kohei Nagai and Akihisa Koga},
  title = {Efficient control of high harmonic terahertz generation in carbon nanotubes using the Aharonov-Bohm effect},
  journal = {Physical Review B},
  year = 2023,
}

@article{CTT100918449,
  author = {Ken Inayoshi and Akihisa Koga and Yuta Murakami},
  title = {Energy Flow during Relaxation in an Electron–Phonon System with Multiple Modes: A Nonequilibrium Green’s Function Study},
  journal = {Journal of the Physical Society of Japan},
  year = 2023,
}

@article{CTT100918451,
  author = {Kaito Mizukami and Akihisa Koga},
  title = {Quantum algorithm for the microcanonical thermal pure quantum state method},
  journal = {Physical Review A},
  year = 2023,
}

@article{CTT100893569,
  author = {Akihiro Hashimoto and Yuta Murakami and Akihisa Koga},
  title = {Majorana gap formation in the anisotropic Kitaev model with ordered flux configuration},
  journal = {Physical Review B},
  year = 2023,
}

@article{CTT100894428,
  author = {Hiroki Iijima and Yuta Murakami and Akihisa Koga},
  title = {Optical Response of the Tightbinding Model on the Fibonacci Chain},
  journal = {Journal of the Physical Society of Japan},
  year = 2022,
}

@article{CTT100894429,
  author = {Yuta Murakami and Kento Uchida and Akihisa Koga and Koichiro Tanaka and Philipp Werner},
  title = {Anomalous Temperature Dependence of High-Harmonic Generation in Mott Insulators},
  journal = {Physical Review Letters},
  year = 2022,
}

@article{CTT100894430,
  author = {Joji Nasu and Yuta Murakami and Akihisa Koga},
  title = {Scattering phenomena for spin transport in a Kitaev spin liquid},
  journal = {Physical Review B},
  year = 2022,
}

@article{CTT100879328,
  author = {Ken Inayoshi and Yuta Murakami and Akihisa Koga},
  title = {Photoinduced dynamics of a quasicrystalline excitonic insulator},
  journal = {Physical Review B},
  year = 2022,
}

@article{CTT100879329,
  author = {Akihisa Koga and Sam Coates},
  title = {Ferrimagnetically ordered states in the Hubbard model on the hexagonal golden-mean tiling},
  journal = {Physical Review B},
  year = 2022,
}

@article{CTT100879327,
  author = {Hirokazu Taguchi and Yuta Murakami and Akihisa Koga},
  title = {Thermally enhanced Majorana-mediated spin transport in the Kitaev model},
  journal = {Physical Review B},
  year = 2022,
}

@article{CTT100879324,
  author = {Hirokazu Taguchi and Yuta Murakami and Akihisa Koga and Joji Nasu},
  title = {Role of Majorana fermions in spin transport of anisotropic Kitaev model},
  journal = {Physical Review B},
  year = 2021,
}

@article{CTT100879325,
  author = {Changming Yue and Shintaro Hoshino and Akihisa Koga and Philipp Werner},
  title = {Unconventional pairing from local orbital fluctuations in strongly correlated A3C60},
  journal = {Physical Review B},
  year = 2021,
}

@article{CTT100879326,
  author = {Akihisa Koga and Yuta Murakami and Joji Nasu},
  title = {Majorana correlations in the Kitaev model with ordered-flux structures},
  journal = {Physical Review B},
  year = 2021,
}

@article{CTT100846890,
  author = {Akihisa Koga},
  title = {Antiferromagnetically Ordered State in the Half-Filled Hubbard Model on the Socolar Dodecagonal Tiling},
  journal = {MATERIALS TRANSACTIONS},
  year = 2021,
}

@article{CTT100846895,
  author = {Shiro Sakai and Akihisa Koga},
  title = {Effect of Electron-Electron Interactions on Metallic State in Quasicrystals},
  journal = {MATERIALS TRANSACTIONS},
  year = 2021,
}

@article{CTT100846892,
  author = {Akihisa Koga and Yuusuke Kamogawa and Joji Nasu},
  title = {Ferromagnetically ordered metal in the single-band hubbard model},
  journal = {AIP Conference Proceedings},
  year = 2021,
}

@article{CTT100845353,
  author = {Yuta Murakami and Shintaro Takayoshi and Akihisa Koga and Philipp Werner},
  title = {High-harmonic generation in one-dimensional Mott insulators},
  journal = {Physical Review B},
  year = 2021,
}

@article{CTT100845320,
  author = {Akihisa Koga},
  title = {Superlattice structure in the antiferromagnetically ordered state in the Hubbard model on the Ammann-Beenker tiling},
  journal = {Physical Review B},
  year = 2020,
}

@article{CTT100845324,
  author = {Tetsuya Minakawa and Yuta Murakami and Akihisa Koga and Joji Nasu},
  title = {Majorana-Mediated Spin Transport in Kitaev Quantum Spin Liquids},
  journal = {Physical Review Letters},
  year = 2020,
}

@article{CTT100838209,
  author = {Ken Inayoshi and Yuta Murakami and Akihisa Koga},
  title = {Excitonic Condensation Reflecting Electronic States in Two-Band Penrose–Hubbard Model},
  journal = {Journal of the Physical Society of Japan},
  year = 2020,
}

@article{CTT100845325,
  author = {Akihisa Koga and Tetsuya Minakawa and Yuta Murakami and Joji Nasu},
  title = {Spin Transport in the Quantum Spin Liquid State in the S = 1 Kitaev Model: Role of the Fractionalized Quasiparticles},
  journal = {Journal of the Physical Society of Japan},
  year = 2020,
}

@article{CTT100838211,
  author = {Yojiro Taguchi and Joji Nasu and Akihisa Koga and Takuya Yoshioka and Hiroki Tsuchiura},
  title = {Magnetic Properties in the Metallic Magnets with Large Anisotropy},
  journal = {Journal of Low Temperature Physics},
  year = 2019,
}

@article{CTT100845282,
  author = {Akihisa Koga and Hiroyuki Tomishige and Joji Nasu},
  title = {Ground-State Properties for Bilayer Kitaev Model: Dimer Expansion Study},
  journal = {Journal of Superconductivity and Novel Magnetism},
  year = 2019,
}

@article{CTT100780757,
  author = {Akihisa Koga and Hiroyuki Tomishige and Joji Nasu},
  title = {Ground-state and Thermodynamic Properties of an S = 1 Kitaev Model},
  journal = {Journal of the Physical Society of Japan},
  year = 2018,
}

@article{CTT100780760,
  author = {Tomishige, Hiroyuki and Nasu, Joji and Koga, Akihisa and Akihisa Koga},
  title = {Interlayer coupling effect on a bilayer Kitaev model},
  journal = {Physical Review B},
  year = 2018,
}

@article{CTT100780761,
  author = {Koga, Akihisa and Nakauchi, Shiryu and Nasu, Joji and Akihisa Koga},
  title = {Role of spin-orbit coupling in the Kugel-Khomskii model on the honeycomb lattice},
  journal = {Physical Review B},
  year = 2018,
}

@article{CTT100780759,
  author = {Koga, Akihisa and Nakauchi, Shiryu and Nasu, Joji and Akihisa Koga},
  title = {Ground-state phase diagram in the Kugel-Khomskii model with finite spin-orbit interactions},
  journal = {Physica B-Condensed Matter},
  year = 2018,
}

@article{CTT100780758,
  author = {Shinzaki, Ryu and Nasu, Joji and Koga, Akihisa and Akihisa Koga},
  title = {Charge Kondo effect and superconductivity in the Falikov-Kimball model with pair hopping},
  journal = {Physical Review B},
  year = 2018,
}

@article{CTT100751952,
  author = {Ryu Shinzaki and Joji Nasu and Akihisa Koga},
  title = {Cluster Size Effects on Electronic Reconstruction in Quasiperiodic System},
  journal = {Journal of Physics: Conference Series},
  year = 2017,
}

@article{CTT100780762,
  author = {Koga, Akihisa and Tsunetsugu, Hirokazu and Akihisa Koga},
  title = {Antiferromagnetic order in the Hubbard model on the Penrose lattice},
  journal = {Physical Review B},
  year = 2017,
}

@article{CTT100780764,
  author = {Sakai, Shiro and Takemori, Nayuta and Koga, Akihisa and Arita, Ryotaro and Akihisa Koga},
  title = {Superconductivity on a quasiperiodic lattice: Extended-to-localized crossover of Cooper pairs},
  journal = {Physical Review B},
  year = 2017,
}

@article{CTT100780763,
  author = {Koga, Akihisa and Yanatori, Hiromasa and Akihisa Koga},
  title = {Spontaneously Symmetry-Breaking States in the Attractive SU(N) Hubbard Model},
  journal = {Journal of the Physical Society of Japan},
  year = 2017,
}

@article{CTT100751949,
  author = {Ryu Shinzaki and Joji Nasu and Akihisa Koga},
  title = {Magnetic Response and Valence Fluctuations in the Extended Anderson Lattice Model with Quasiperiodicity},
  journal = {Journal of the Physical Society of Japan},
  year = 2016,
}

@article{CTT100713938,
  author = {Shoya Kojima and Joji Nasu and Akihisa Koga},
  title = {Phase transitions in the Hubbard model for the bismuth nickelate},
  journal = {Physical Review B},
  year = 2016,
}

@article{CTT100716811,
  author = {Ryu Shinzaki and Joji Nasu and Akihisa Koga},
  title = {DMFT Study for Valence Fluctuations in the Extended Periodic Anderson Model},
  journal = {Journal of Physics: Conference Series},
  year = 2016,
}

@article{CTT100713937,
  author = {Hiromasa Yanatori and Akihisa Koga},
  title = {Finite-temperature phase transitions in the SU(N) Hubbard model},
  journal = {Physical Review B},
  year = 2016,
}

@article{CTT100713936,
  author = {Hiromasa Yanatori and Akihisa Koga},
  title = {Finite Temperature Properties of Three-Component Fermion Systems in Optical Lattice},
  journal = {Journal of the Physical Society of Japan},
  year = 2016,
}

@article{CTT100713941,
  author = {Bunpei Hara and Akihisa Koga and Aono, Tomosuke},
  title = {Transport properties for a quantum dot coupled to normal leads with a pseudogap},
  journal = {Physical Review B},
  year = 2015,
}

@article{CTT100713940,
  author = {Akihisa Koga and Werner, Philipp},
  title = {Superconductivity in the two-band Hubbard model},
  journal = {Physical Review B},
  year = 2015,
}

@article{CTT100713939,
  author = {Nayuta Takemori and Akihisa Koga},
  title = {Local Electron Correlations in a Two-Dimensional Hubbard Model on the Penrose Lattice},
  journal = {Journal of the Physical Society of Japan},
  year = 2015,
}

@article{CTT100713942,
  author = {Shin-ichi Takemura and Nayuta Takemori and Akihisa Koga},
  title = {Valence fluctuations and electric reconstruction in the extended Anderson model on the two-dimensional Penrose lattice},
  journal = {Physical Review B},
  year = 2015,
}

@article{CTT100713934,
  author = {Yuki Okanami and Nayuta Takemori and Akihisa Koga},
  title = {Stability of the superfluid state in three-component fermionic optical lattice systems},
  journal = {Physical Review a},
  year = 2014,
}

@article{CTT100713842,
  author = {Ryota Suzuki and Akihisa Koga},
  title = {Supersolid States in a Hard-Core Bose-Hubbard Model on a Layered Triangular Lattice},
  journal = {Journal of the Physical Society of Japan},
  year = 2014,
}

@article{CTT100713843,
  author = {Takamitu Saitou and Akihisa Koga and Yamamoto, A.},
  title = {Metal-Insulator Transition in Optical Lattice System with Site-Dependent Interactions},
  journal = {Journal of Superconductivity and Novel Magnetism},
  year = 2013,
}

@article{CTT100713844,
  author = {Akihisa Koga and Takamitu Saitou and Yamamoto, Atsushi},
  title = {Mott Transitions in the Hubbard Model with Spatially Modulated Interactions},
  journal = {Journal of the Physical Society of Japan},
  year = 2013,
}

@article{CTT100713845,
  author = {Akihisa Koga},
  title = {Quantum Monte Carlo study of nonequilibrium transport through a quantum dot coupled to normal and superconducting leads},
  journal = {Physical Review B},
  year = 2013,
}

@article{CTT100713849,
  author = {Okawauchi, Yasuharu and Akihisa Koga},
  title = {Stability of FFLO States in Optical Lattices with Bilayer Structure},
  journal = {Journal of the Physical Society of Japan},
  year = 2012,
}

@article{CTT100713848,
  author = {Nayuta Takemori and Akihisa Koga},
  title = {Low-Temperature Properties of the Fermionic Mixtures with Mass Imbalance in Optical Lattice},
  journal = {Journal of the Physical Society of Japan},
  year = 2012,
}

@article{CTT100713847,
  author = {Akihisa Koga and Werner, Philipp and Sebastian, SE and Sutherland, ML and Pugh, E and Grosche, FM and Keeling, J and Panagopoulos, C and Rowley, S and Saxena, SS},
  title = {Dynamical properties of ultracold fermions with attractive interactions in an optical lattice},
  journal = {International Conference on Strongly Correlated Electron Systems (Sces 2011)},
  year = 2012,
}

@article{CTT100713846,
  author = {Tada, Y. and Peters, R. and Oshikawa, M. and Akihisa Koga and Kawakami, N. and Fujimoto, S.},
  title = {Correlation effects in two-dimensional topological insulators},
  journal = {Physical Review B},
  year = 2012,
}

@article{CTT100713854,
  author = {Akihisa Koga and Werner, Philipp and Saito, S and Tanaka, H and Nakamura, T and Nakamura, M},
  title = {Superfluid state in the periodic Anderson model with attractive interactions},
  journal = {International Symposium: Nanoscience and Quantum Physics 2011 (Nanophys'11)},
  year = 2011,
}

@article{CTT100713850,
  author = {Akihisa Koga and Werner, Philipp},
  title = {Low-temperature properties of the infinite-dimensional attractive Hubbard model},
  journal = {Physical Review a},
  year = 2011,
}

@article{CTT100713851,
  author = {Akihisa Koga and Werner, Philipp},
  title = {PSEUDOGAP BEHAVIOR IN THE INFINITE DIMENSIONAL ATTRACTIVE HUBBARD MODEL},
  journal = {Modern Physics Letters B},
  year = 2011,
}

@article{CTT100713852,
  author = {Akihisa Koga and Bauer, J. and Werner, P. and Pruschke, Th},
  title = {Polarized superfluid state in a three-dimensional fermionic optical lattice},
  journal = {Physica E-Low-Dimensional Systems & Nanostructures},
  year = 2011,
}

@article{CTT100713853,
  author = {Akihisa Koga and Werner, Philipp and Ronning, F and Batista, C},
  title = {Superfluid gap formation in a fermionic optical lattice with spin imbalanced populations},
  journal = {International Conference on Strongly Correlated Electron Systems (Sces 2010)},
  year = 2011,
}

@article{CTT100713856,
  author = {Yoshioka, Takuya and Akihisa Koga and Kawakami, Norio},
  title = {Magnetic transition in the Hubbard model on the triangular lattice},
  journal = {Physica B-Condensed Matter},
  year = 2010,
}

@article{CTT100713861,
  author = {Fujihara, Yusuke and Akihisa Koga and Kawakami, Norio},
  title = {Superfluid properties of ultracold fermionic atoms in two-dimensional optical lattices},
  journal = {Physical Review a},
  year = 2010,
}

@article{CTT100713860,
  author = {Akihisa Koga and Werner, Philipp},
  title = {Superfluid State in the Periodic Anderson Model with Attractive Interactions},
  journal = {Journal of the Physical Society of Japan},
  year = 2010,
}

@article{CTT100713859,
  author = {Akihisa Koga and Werner, Philipp},
  title = {Polarized Superfluidity in the Imbalanced Attractive Hubbard Model},
  journal = {Journal of the Physical Society of Japan},
  year = 2010,
}

@article{CTT100713858,
  author = {Yoshioka, Takuya and Akihisa Koga and Kawakami, Norio},
  title = {Mott transition in the Hubbard model on the triangular lattice},
  journal = {Physica Status Solidi B-Basic Solid State Physics},
  year = 2010,
}

@article{CTT100713857,
  author = {Noda, Kazuto and Akihisa Koga and Kawakami, Norio and Pruschke, Thomas},
  title = {Magnetically Ordered State of Cold Fermions on a Decorated Square Lattice},
  journal = {Journal of Low Temperature Physics},
  year = 2010,
}

@article{CTT100713855,
  author = {Fujihara, Yusuke and Akihisa Koga and Kawakami, Norio},
  title = {Analysis of superfluid state of ultracold fermions with attractive interactions in two-dimensional optical lattices},
  journal = {Physica C-Superconductivity and Its Applications},
  year = 2010,
}

@article{CTT100713935,
  author = {Takuya Yoshioka and Akihisa Koga and Norio Kawakami},
  title = {Quantum Phase Transitions in the Hubbard Model on a Triangular Lattice},
  journal = {Physical Review Letters},
  year = 2009,
}

@article{CTT100713868,
  author = {Akihisa Koga and Higashiyama, T. and Inaba, K. and Suga, S. and Kawakami, N. and Kes, P and Jochemsen, R},
  title = {Supersolid state in a fermionic optical lattice system},
  journal = {25th International Conference on Low Temperature Physics (Lt25), Part 3},
  year = 2009,
}

@article{CTT100713864,
  author = {Miyashita, Satoshi and Yamashita, Yasufumi and Yonemitsu, Kenji and Akihisa Koga and Kawakami, Norio and Kes, P and Jochemsen, R},
  title = {Mott insulating state in a quarter-filled two-orbital Hubbard chain with different bandwidths},
  journal = {25th International Conference on Low Temperature Physics (Lt25), Part 4},
  year = 2009,
}

@article{CTT100713863,
  author = {Koyama, Yohta and Akihisa Koga and Kawakami, Norio and Werner, Philipp},
  title = {Magnetic properties of the two-band Hubbard model with different bandwidths},
  journal = {Physica B-Condensed Matter},
  year = 2009,
}

@article{CTT100713862,
  author = {Noda, Kazuto and Akihisa Koga and Kawakami, Norio and Pruschke, Thomas},
  title = {Ferromagnetism of cold fermions loaded into a decorated square lattice},
  journal = {Physical Review a},
  year = 2009,
}

@article{CTT100713870,
  author = {Inaba, K. and Akihisa Koga and Suga, S. and Kawakami, N. and Kes, P and Jochemsen, R},
  title = {Zero-temperature Phase Diagram of Two Dimensional Hubbard Model},
  journal = {25th International Conference on Low Temperature Physics (Lt25), Part 4},
  year = 2009,
}

@article{CTT100713869,
  author = {Akihisa Koga and Higashiyama, Takuji and Inaba, Kensuke and Suga, Seiichiro and Kawakami, Norio},
  title = {Supersolid state in fermionic optical lattice systems},
  journal = {Physical Review a},
  year = 2009,
}

@article{CTT100713867,
  author = {Fujihara, Yusuke and Akihisa Koga and Kawakami, Norio},
  title = {Superfluidity and magnetism in two-dimensional fermionic optical lattice systems},
  journal = {Physica B-Condensed Matter},
  year = 2009,
}

@article{CTT100713866,
  author = {Fujihara, Yusuke and Akihisa Koga and Kawakami, Norio},
  title = {Spatially modulated superfluid states in fermionic optical ladder systems with repulsive interactions},
  journal = {Physical Review a},
  year = 2009,
}

@article{CTT100713875,
  author = {Akihisa Koga and Kawakami, Norio and Peters, Robert and Pruschke, Thomas},
  title = {Phase transitions in the extended periodic Anderson model},
  journal = {Physica B-Condensed Matter},
  year = 2008,
}

@article{CTT100713878,
  author = {Fujihara, Yusuke and Akihisa Koga and Kawakami, Norio},
  title = {Variational Monte Carlo analysis of singlet-pairing state in a system with inhomogeneous potential},
  journal = {Journal of Physics and Chemistry of Solids},
  year = 2008,
}

@article{CTT100713871,
  author = {Yoshioka, Takuya and Akihisa Koga and Kawakami, Norio},
  title = {Frustration effects in an anisotropic checkerboard lattice Hubbard model},
  journal = {Physical Review B},
  year = 2008,
}

@article{CTT100713872,
  author = {Yoshioka, Takuya and Akihisa Koga and Kawakami, Norio},
  title = {Instability of plaquette valence-bond crystal phase in planar pyrochlore electron system},
  journal = {Physica B-Condensed Matter},
  year = 2008,
}

@article{CTT100713873,
  author = {Akihisa Koga and Kawakami, Norio and Peters, Robert and Pruschke, Thomas},
  title = {Magnetic properties of the extended periodic Anderson model},
  journal = {Journal of the Physical Society of Japan},
  year = 2008,
}

@article{CTT100713874,
  author = {Yoshioka, Takuya and Akihisa Koga and Kawakami, Norio},
  title = {Mott Transition in the Hubbard Model on Checkerboard Lattice},
  journal = {Journal of the Physical Society of Japan},
  year = 2008,
}

@article{CTT100713877,
  author = {Akihisa Koga and Higashiyama, Takuji and Inaba, Kensuke and Suga, Seiichiro and Kawakami, Norio},
  title = {Supersolid state of ultracold fermions in optical lattice},
  journal = {Journal of the Physical Society of Japan},
  year = 2008,
}

@article{CTT100713876,
  author = {Akihisa Koga and Kawakami, Norio and Peters, Robert and Pruschke, Thomas},
  title = {Quantum phase transitions in the extended periodic Anderson model},
  journal = {Physical Review B},
  year = 2008,
}

@article{CTT100713880,
  author = {Inaba, Kensuke and Akihisa Koga},
  title = {Metal-insulator transition in the two-orbital hubbard model at fractional band fillings: Self-energy functional approach},
  journal = {Journal of the Physical Society of Japan},
  year = 2007,
}

@article{CTT100713879,
  author = {Akihisa Koga and Yoshioka, Takuya and KawakaMi, Norio and Yokoyama, Hisatoshi},
  title = {Electron correlations in the Hubbard model on the planar pyrochlore lattice},
  journal = {Physica C-Superconductivity and Its Applications},
  year = 2007,
}

@article{CTT100713881,
  author = {Kuratani, Syunsuke and Akihisa Koga and Kawakami, Norio},
  title = {Mott transition of correlated electrons on the Kagome lattice},
  journal = {Journal of Physics-Condensed Matter},
  year = 2007,
}

@article{CTT100713882,
  author = {Koyama, Y. and Akihisa Koga and Kawakami, N.},
  title = {Quantum Monte Carlo study of impurity Anderson models with degenerate orbitals},
  journal = {Journal of Magnetism and Magnetic Materials},
  year = 2007,
}

@article{CTT100713883,
  author = {Akihisa Koga and Yoshioka, Takuya and Kawakami, Norio and Yokoyama, Hisatoshi},
  title = {Quantum phase transitions in the Hubbard model on the planar pyrochlore lattice},
  journal = {Journal of Magnetism and Magnetic Materials},
  year = 2007,
}

@article{CTT100713884,
  author = {Sigrist, Manfred and Agterberg, D. F. and Frigeri, P. A. and Hayashi, N. and Kaur, R. P. and Akihisa Koga and Milat, I. and Wakabayashi, K. and Yanase, Y.},
  title = {Superconductivity in non-centrosymmetric materials},
  journal = {Journal of Magnetism and Magnetic Materials},
  year = 2007,
}

@article{CTT100713885,
  author = {Yoshioka, T. and Akihisa Koga and Kawakami, N.},
  title = {Systematic analysis of the Hubbard model on the checkerboard lattice},
  journal = {Journal of Magnetism and Magnetic Materials},
  year = 2007,
}

@article{CTT100713886,
  author = {Inaba, K. and Akihisa Koga and Suga, S. and Kawakami, N.},
  title = {Thermodynamic properties of the two-orbital Hubbard model},
  journal = {Journal of Magnetism and Magnetic Materials},
  year = 2007,
}

@article{CTT100713887,
  author = {Fujihara, Yusuke and Akihisa Koga and Kawakami, Norio},
  title = {Variational Monte Carlo analysis of Hubbard model with confining potential: One-dimensional fermionic optical lattice systems},
  journal = {Journal of the Physical Society of Japan},
  year = 2007,
}

@article{CTT100713888,
  author = {Fujihara, Yusuke and Akihisa Koga and Kawakami, Norio},
  title = {Variational Monte Carlo study of Hubbard model with harmonic confinement},
  journal = {Journal of Magnetism and Magnetic Materials},
  year = 2007,
}

@article{CTT100713891,
  author = {Inaba, K and Akihisa Koga},
  title = {Phase diagrams of the two-orbital Hubbard model with different bandwidths},
  journal = {Physical Review B},
  year = 2006,
}

@article{CTT100713892,
  author = {Sigrist, M and Agterberg, DF and Frigeri, PA and Hayashi, N and Kaur, RP and Akihisa Koga and Milat, I and Wakabayashi, K and Batrouni, GG and Poilblanc, D},
  title = {Unconventional superconductivity in non-centrosymmetric materials},
  journal = {Effective Models For Low-Dimensional Strongly Correlated Systems},
  year = 2006,
}

@article{CTT100713889,
  author = {Yoshioka, T and Akihisa Koga and Kawakami, N},
  title = {Analysis of checkerboard electron system by path-integral renormalization group method},
  journal = {Physica B-Condensed Matter},
  year = 2006,
}

@article{CTT100713890,
  author = {Agterberg, DF and Frigeri, PA and Kaur, RP and Akihisa Koga and Sigrist, M},
  title = {Magnetic fields and superconductivity without inversion symmetry in CePt3Si},
  journal = {Physica B-Condensed Matter},
  year = 2006,
}

@article{CTT100713896,
  author = {Akihisa Koga and Inaba, K and Kawakami, N},
  title = {Mott transitions in two-orbital Hubbard systems},
  journal = {Progress of Theoretical Physics Supplement},
  year = 2005,
}

@article{CTT100713897,
  author = {Inaba, K and Akihisa Koga and Suga, SI and Kawakami, N},
  title = {Phase diagram of orbital-selective Mott transitions at finite temperatures},
  journal = {Journal of the Physical Society of Japan},
  year = 2005,
}

@article{CTT100713899,
  author = {Frigeri, PA and Agterberg, DF and Akihisa Koga and Sigrist, M},
  title = {Superconductivity without inversion symmetry in CePt3Si},
  journal = {Physica B-Condensed Matter},
  year = 2005,
}

@article{CTT100713898,
  author = {Akihisa Koga and Kawakami, N and Rice, TM and Sigrist, M},
  title = {Spin, charge, and orbital fluctuations in a multiorbital Mott insulator},
  journal = {Physical Review B},
  year = 2005,
}

@article{CTT100713893,
  author = {Ohashi, T and Akihisa Koga and Suga, SI and Kawakami, N},
  title = {Field-induced phase transition in the periodic Anderson model},
  journal = {Physica B-Condensed Matter},
  year = 2005,
}

@article{CTT100713894,
  author = {Inaba, K and Akihisa Koga and Suga, S and Kawakami, N},
  title = {Finite-temperature Mott transitions in the multiorbital Hubbard model},
  journal = {Physical Review B},
  year = 2005,
}

@article{CTT100713895,
  author = {Akihisa Koga and Kawakami, N and Rice, TM and Sigrist, M},
  title = {Mott transitions in the multi-orbital systems},
  journal = {Physica B-Condensed Matter},
  year = 2005,
}

@article{CTT100713905,
  author = {Frigeri, PA and Agterberg, DF and Akihisa Koga and Sigrist, M},
  title = {Superconductivity without inversion symmetry: MnSi versus CePt3Si},
  journal = {Physical Review Letters},
  year = 2004,
}

@article{CTT100713900,
  author = {Ohashi, T and Akihisa Koga and Suga, S and Kawakami, N},
  title = {Field-induced phase transitions in a Kondo insulator},
  journal = {Physical Review B},
  year = 2004,
}

@article{CTT100713901,
  author = {Yoshioka, T and Akihisa Koga and Kawakami, N},
  title = {Frustrated ising model on the garnet lattice},
  journal = {Journal of the Physical Society of Japan},
  year = 2004,
}

@article{CTT100713902,
  author = {Saito, Y and Akihisa Koga and Kawakami, N},
  title = {Hole dynamics in the orthogonal-dimer spin system},
  journal = {Journal of the Physical Society of Japan},
  year = 2004,
}

@article{CTT100713903,
  author = {Akihisa Koga and Kawakami, N and Rice, TM and Sigrist, M},
  title = {Orbital-selective Mott transitions in the degenerate Hubbard model},
  journal = {Physical Review Letters},
  year = 2004,
}

@article{CTT100713904,
  author = {Sato, R and Ohashi, T and Akihisa Koga and Kawakami, N},
  title = {Periodic Anderson model with degenerate orbitals: Linearized dynamical mean field theory approach},
  journal = {Journal of the Physical Society of Japan},
  year = 2004,
}

@article{CTT100713906,
  author = {Frigeri, PA and Agterberg, DF and Akihisa Koga and Sigrist, M},
  title = {Superconductivity without inversion symmetry: MnSi versus CePt3Si (vol 92, art no 097001, 2004)},
  journal = {Physical Review Letters},
  year = 2004,
}

@article{CTT100713911,
  author = {Akihisa Koga and Kawakami, N},
  title = {Quantum phase transitions in a frustrated orthogonal-dimer S=1 spin system},
  journal = {Physica B-Condensed Matter},
  year = 2003,
}

@article{CTT100713912,
  author = {Akihisa Koga and Kawakami, N and Sigrist, M},
  title = {Quantum phase transitions of the S=1 Shastry-Sutherland model},
  journal = {Journal of the Physical Society of Japan},
  year = 2003,
}

@article{CTT100713910,
  author = {Saito, Y and Akihisa Koga and Kawakami, N},
  title = {Hole-doping effects on a two-dimensional Kondo insulator},
  journal = {Journal of the Physical Society of Japan},
  year = 2003,
}

@article{CTT100713909,
  author = {Kawaguchi, A and Akihisa Koga and Okunishi, K and Kawakami, N},
  title = {Hole-doping effects on a frustrated spin ladder},
  journal = {Journal of the Physical Society of Japan},
  year = 2003,
}

@article{CTT100713908,
  author = {Akihisa Koga and Ohashi, T and Imai, Y and Suga, S and Kawakami, N},
  title = {Effects of degenerate orbitals on the Hubbard model},
  journal = {Journal of the Physical Society of Japan},
  year = 2003,
}

@article{CTT100713907,
  author = {Akihisa Koga and Kawakami, N},
  title = {Effects of degenerate orbitals on the Anderson lattice model},
  journal = {Journal of Physics-Condensed Matter},
  year = 2003,
}

@article{CTT100713959,
  author = {Yamamoto, S and Sakai, T and Akihisa Koga},
  title = {Re-entrant quantum phase transitions in antiferromagnetic spin-1 ladders},
  journal = {Journal of the Physical Society of Japan},
  year = 2002,
}

@article{CTT100713915,
  author = {Akihisa Koga and Kawakami, N and Sigrist, M},
  title = {Hole-doping effects on an S=1 ladder system},
  journal = {Physica B-Condensed Matter},
  year = 2002,
}

@article{CTT100713913,
  author = {Akihisa Koga and Kawaguchi, A and Okunishi, K and Kawakami, N},
  title = {First-order phase transitions in frustrated spin systems},
  journal = {Progress of Theoretical Physics Supplement},
  year = 2002,
}

@article{CTT100713914,
  author = {Akihisa Koga and Kawakami, N},
  title = {Frustration-induced phase transitions in the spin-S orthogonal-dimer chain},
  journal = {Physical Review B},
  year = 2002,
}

@article{CTT100713916,
  author = {Kawaguchi, A and Akihisa Koga and Okunishi, K and Kawakami, N},
  title = {Hole-doping effects on orthogonal-dimer spin chain},
  journal = {Journal of Physics and Chemistry of Solids},
  year = 2002,
}

@article{CTT100713917,
  author = {Kawaguchi, A and Akihisa Koga and Kawakami, N and Okunishi, K},
  title = {Magnetization curves of quasi-one-dimensional haldane systems},
  journal = {International Journal of Modern Physics B},
  year = 2002,
}

@article{CTT100713918,
  author = {Kawaguchi, A and Akihisa Koga and Okunishi, K and Kawakami, N},
  title = {Magnetization process for a quasi-one-dimensional S=1 antiferromagnet},
  journal = {Physical Review B},
  year = 2002,
}

@article{CTT100713919,
  author = {Yamamoto, S and Sakai, T and Akihisa Koga},
  title = {Quantum phase competition in antiferromagnetic spin-1 ladders},
  journal = {Progress of Theoretical Physics Supplement},
  year = 2002,
}

@article{CTT100713920,
  author = {Akihisa Koga},
  title = {Quasi-one-dimensional Haldane gap systems with single-ion anisotropy},
  journal = {Physics Letters a},
  year = 2002,
}

@article{CTT100713922,
  author = {Akihisa Koga and Imai, Y and Kawakami, N},
  title = {Stability of a metallic state in the two-orbital Hubbard model},
  journal = {Physical Review B},
  year = 2002,
}

@article{CTT100713924,
  author = {Akihisa Koga and Kawakami, N},
  title = {Frustrated Heisenberg antiferromagnet on the pyrochlore lattice},
  journal = {Physical Review B},
  year = 2001,
}

@article{CTT100713923,
  author = {Takushima, Y and Akihisa Koga and Kawakami, N},
  title = {Competing spin-gap phases in a frustrated quantum spin system in two dimensions},
  journal = {Journal of the Physical Society of Japan},
  year = 2001,
}

@article{CTT100713925,
  author = {Akihisa Koga and Kawakami, N},
  title = {Quantum phase transitions for the three-dimensional orthogonal-dimer spin system},
  journal = {Computer Physics Communications},
  year = 2001,
}

@article{CTT100713928,
  author = {Takushima, Y and Akihisa Koga and Kawakami, N},
  title = {Magnetic double structure for S=1 and S=1/2 mixed-spin systems},
  journal = {Physical Review B},
  year = 2000,
}

@article{CTT100713932,
  author = {Akihisa Koga and Kawakami, N},
  title = {Quantum phase transitions in the Shastry-Sutherland model for SrCu2(BO3)(2)},
  journal = {Physical Review Letters},
  year = 2000,
}

@article{CTT100713929,
  author = {Akihisa Koga and Kawakami, N},
  title = {Phase diagram for two-dimensional spin systems with ladder, plaquette and mixed-spin structures},
  journal = {Journal of the Physical Society of Japan},
  year = 2000,
}

@article{CTT100713930,
  author = {Akihisa Koga and Kawakami, N},
  title = {Quantum phase transitions for mixed-spin systems},
  journal = {Journal of the Physical Society of Japan},
  year = 2000,
}

@article{CTT100713931,
  author = {Akihisa Koga and Kawakami, N},
  title = {Quantum phase transitions for the Haldane system in higher dimensions: A mixed-spin cluster expansion approach},
  journal = {Physical Review B},
  year = 2000,
}

@article{CTT100713926,
  author = {Akihisa Koga and Okunishi, K and Kawakami, N},
  title = {First-order quantum phase transition in the orthogonal-dimer spin chain},
  journal = {Physical Review B},
  year = 2000,
}

@article{CTT100713947,
  author = {Akihisa Koga and Kumada, S and Kawakami, N},
  title = {Quantum phase transitions in two-dimensional spin systems with ladder, plaquette and mixed-spin structures},
  journal = {Journal of the Physical Society of Japan},
  year = 1999,
}

@article{CTT100713948,
  author = {Akihisa Koga and Kumada, S and Kawakami, N},
  title = {Two-dimensional quantum spill systems with ladder and Plaquette structures},
  journal = {Journal of the Physical Society of Japan},
  year = 1999,
}

@article{CTT100713946,
  author = {Akihisa Koga and Kumada, S and Kawakami, N and Fukui, T},
  title = {Mixed-spin ladders and plaquette spin chains},
  journal = {Journal of the Physical Society of Japan},
  year = 1998,
}

@inproceedings{CTT100894795,
  author = {古賀昌久},
  title = {二次元準周期タイルとハイパーユニフォーミティ},
  booktitle = {},
  year = 2023,
}

@inproceedings{CTT100723643,
  author = {Akihisa Koga},
  title = {Finite Temperature Phase Transitions in the multicomponent Hubbard model},
  booktitle = {},
  year = 2016,
}

@inproceedings{CTT100723644,
  author = {Akihisa Koga},
  title = {Finite Temperature Phase Transitions in the multicomponent Hubbard model},
  booktitle = {},
  year = 2016,
}

@inproceedings{CTT100723641,
  author = {古賀昌久},
  title = {Valence fluctuations in heavy fermion system on the Penrose lattice},
  booktitle = {},
  year = 2016,
}

@inproceedings{CTT100720016,
  author = {那須譲治 and 新崎龍 and 古賀昌久},
  title = {スピン1/2 Falicov-Kimball模型における準周期性と価数揺らぎ},
  booktitle = {},
  year = 2016,
}

@inproceedings{CTT100720019,
  author = {那須譲治 and 新崎龍 and 古賀昌久},
  title = {動的平均場近似によるスピン 1/2 Falicov-Kimball 模型における準周期性と価数揺らぎ},
  booktitle = {},
  year = 2015,
}

@inproceedings{CTT100723646,
  author = {古賀昌久 and 常次 宏一},
  title = {二次元ペンローズハバード模型における磁気的性質},
  booktitle = {},
  year = 2015,
}

@inproceedings{CTT100723647,
  author = {Akihisa Koga},
  title = {Local electron correlations in the quasiperiodic systems},
  booktitle = {},
  year = 2015,
}

@inproceedings{CTT100723652,
  author = {Akihisa Koga},
  title = {Superconductivity in the degenerate Hubbard model},
  booktitle = {},
  year = 2015,
}

@inproceedings{CTT100723649,
  author = {古賀昌久 and 竹村信一 and 竹森那由多},
  title = {強相関準結晶系における価数ゆらぎと近藤効果},
  booktitle = {},
  year = 2015,
}

@inproceedings{CTT100723650,
  author = {B. Hara and A. Koga and T. Aono},
  title = {Transport properties for a quantum dot coupled to normal leads with the pseudogap structure},
  booktitle = {},
  year = 2015,
}

@inproceedings{CTT100723651,
  author = {S. Takemura and N. Takemori and A. Koga},
  title = {Valence fluctuations in the extended periodic Anderson model on the two-dimensional Penrose lattice},
  booktitle = {},
  year = 2015,
}

@misc{CTT100603733,
  author = {古賀昌久},
  title = {低次元スピン系における量子相転移の理論的研究},
  year = 2000,
}



@phdthesis{CTT100603733,
  author = {古賀昌久},
  title = {低次元スピン系における量子相転移の理論的研究},
  school = {大阪大学},
  year = 2000,
}