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Papers (refereed journals)

  1. Orthogonal and antiparallel vortex tubes and energy cascade in quantum turbulence
    Tsuyoshi Kadokura and Hiroki Saito

  2. Method to solve quantum few-body problems with artificial neural networks
    Hiroki Saito
    J. Phys. Soc. Jpn. 87, 074002 (2018)
    arXiv:1804.06521

  3. Dynamics of vortices followed by the collapse of ring dark solitons in a two-component Bose-Einstein condensate
    L.-X. Wang, C.-Q. Dai, L. Wen, T. Liu, H. Jiang, H. Saito, S.-G. Zhang, and X.-F. Zhang
    Phys. Rev. A 97, 063607 (2018)

  4. Ground-state phases of a mixture of spin-1 and spin-2 Bose-Einstein condensates
    Naoki Irikura, Yujiro Eto, Takuya Hirano, and Hiroki Saito
    Phys. Rev. A 97, 023622 (2018)
    arXiv:1712.05111

  5. Stationary states and rotational properties of spin-orbit-coupled Bose-Einstein condensates held under a toroidal trap
    Zhang-Ming He, Xiao-Fei Zhang, Masaya Kato, Wei Han, and Hiroki Saito
    Phys. Lett. A 382, 1690 (2018)

  6. Machine learning technique to find quantum many-body ground states of bosons on a lattice
    Hiroki Saito and Masaya Kato
    J. Phys. Soc. Jpn. 87, 014001 (2018)
    arXiv:1709.05468

  7. Moving obstacle potential in a spin-orbit-coupled Bose-Einstein condensate
    Masaya Kato, Xiao-Fei Zhang, and Hiroki Saito
    Phys. Rev. A 96, 033613 (2017)
    arXiv:1707.09136

  8. Spinor dynamics in a mixture of spin-1 and spin-2 Bose-Einstein condensates
    Yujiro Eto, Hitoshi Shibayama, Hiroki Saito, and Takuya Hirano
    Phys. Rev. A 97, 021602(R) (2018)
    arXiv:1707.02660

  9. Solving the Bose-Hubbard model with machine learning
    Hiroki Saito
    J. Phys. Soc. Jpn. 86, 093001 (2017)
    arXiv:1707.09723

  10. Fingering instabilities and pattern formation in a two-component dipolar Bose-Einstein condensate
    Kui-Tian Xi, Tim Byrnes, and Hiroki Saito
    Phys. Rev. A 97, 023625 (2018)
    arXiv:1704.04949

  11. Vortex pairs in a spin-orbit coupled Bose-Einstein condensate
    Masaya Kato, Xiao-Fei Zhang, and Hiroki Saito
    Phys. Rev. A 95, 043605 (2017)
    arXiv:1701.04591

  12. Spin-orbit-coupled Bose-Einstein condensates held under toroidal trap
    Xiao-Fei Zhang, Masaya Kato, Wei Han, Shou-Gang Zhang, and Hiroki Saito
    Phys. Rev. A 95, 033620 (2017)
    arXiv:1610.09458

  13. Topological defect formation in rotating binary dipolar Bose-Einstein condensate
    Xiao-Fei Zhang, Wei Han, Hai-Feng Jiang, Wu-Ming Liu, Hiroki Saito, and Shou-Gang Zhang
    Ann. Phys. 375, 368 (2016)

  14. Twisted spin vortices in a spin-1 Bose-Einstein condensate with Rashba spin-orbit coupling and dipole-dipole interaction
    Masaya Kato, Xiao-Fei Zhang, Daichi Sasaki, and Hiroki Saito
    Phys. Rev. A 94, 043633 (2016)
    arXiv:1607.08724

  15. Self-rotation and synchronization in exciton-polariton condensates
    Hiroki Saito and Rina Kanamoto
    Phys. Rev. B 94, 165306 (2016)
    arXiv:1606.07586

  16. Path-integral Monte Carlo study on a droplet of a dipolar Bose-Einstein condensate stabilized by quantum fluctuation
    Hiroki Saito
    J. Phys. Soc. Jpn. 85, 053001 (2016)
    arXiv:1603.03148

  17. Double-quantum spin vortices in SU(3) spin-orbit coupled Bose gases
    Wei Han, Xiao-Fei Zhang, Shu-Wei Song, Hiroki Saito, Wei Zhang, Wu-Ming Liu, and Shou-Gang Zhang
    Phys. Rev. A 94, 033629 (2016)
    arXiv:1601.06935

  18. Collision dynamics of skyrmions in a two-component Bose-Einsteincondensate
    Tomoya Kaneda and Hiroki Saito
    Phys. Rev. A 93, 033611 (2016)
    arXiv:1601.01773

  19. Non-equilibrium dynamics induced by miscible-immiscible transition in binary Bose-Einstein condensates
    Yujiro Eto, Masahiro Takahashi, Masaya Kunimi, Hiroki Saito, and Takuya Hirano
    New J. Phys. 18, 073029 (2016) ; 20, 019501 (2018)
    arXiv:1512.01331

  20. Bouncing motion and penetration dynamics in multicomponent Bose-Einstein condensates
    Yujiro Eto, Masahiro Takahashi, Keita Nabeta, Ryotaro Okada, Masaya Kunimi, Hiroki Saito, and Takuya Hirano
    Phys. Rev. A 93, 033615 (2016); 96, 069904 (2017)
    arXiv:1511.01624

  21. Droplet formation in a Bose-Einstein condensate with strong dipole-dipole interaction
    Kui-Tian Xi and Hiroki Saito
    Phys. Rev. A 93, 011604(R) (2016)
    arXiv:1510.07842

  22. Can we swim in superfluids?: Numerical demonstration of self-propulsion in a Bose-Einstein condensate
    Hiroki Saito
    J. Phys. Soc. Jpn. 84, 114001 (2015)
    arXiv:1505.06854

  23. Suppression of relative flow by multiple domains in two-component Bose-Einstein condensates
    Yujiro Eto, Masaya Kunimi, Hidekatsu Tokita, Hiroki Saito, and Takuya Hirano
    Phys. Rev. A 92, 013611 (2015)
    arXiv:1505.04882

  24. Upper bound of one-magnon excitation and lower bound of effective mass for ferromagnetic spinor Bose and Fermi gases
    Masaya Kunimi and Hiroki Saito
    Phys. Rev. A 91, 043624 (2015)
    arXiv:1503.03951

  25. Energy shift of magnons in a ferromagnetic spinor-dipolar Bose-Einstein condensate
    Hiroki Saito and Masaya Kunimi
    Phys. Rev. A 91, 041603(R) (2015)
    arXiv:1502.04161

  26. Dynamics of a vortex dipole across a magnetic phase boundary in a spinor Bose-Einstein condensate
    Tomoya Kaneda and Hiroki Saito
    Phys. Rev. A 90, 053632 (2014)
    arXiv:1410.0743

  27. Hysteresis in quantized vortex shedding
    Tsuyoshi Kadokura, Jun Yoshida, and Hiroki Saito
    Phys. Rev. A 90, 013612 (2014)
    arXiv:1405.4577

  28. Control of spin current in a Bose gas by periodic application of pi pulses
    Yujiro Eto, Mark Sadgrove, Sho Hasegawa, Hiroki Saito, and Takuya Hirano
    Phys. Rev. A 90, 013626 (2014)
    arXiv:1405.0347

  29. Observation of Dipole-Induced Spin Texture in an 87Rb Bose-Einstein Condensate
    Yujiro Eto, Hiroki Saito, and Takuya Hirano
    Phys. Rev. Lett. 112, 185301 (2014)
    arXiv:1402.7071

  30. Comment on ``Ground-state fragmentation phase transition for attractive bosons in anisotropic traps''
    Hiroki Saito
    Phys. Rev. A 89, 067601 (2014)
    Comment on N. C. Cizek et al., Phys. Rev. A 88, 063641 (2013)

  31. Many-body dynamics of a Bose-Einstein condensate collapsing by quantum tunneling
    Hiroki Saito
    Phys. Rev. A 89, 023610 (2014)
    arXiv:1309.7775

  32. Control and detection of the Larmor precession of F=2 87Rb Bose-Einstein condensates by Ramsey interferometry and spin echo
    Yujiro Eto, Sawako Sekine, Sho Hasegawa, Mark Sadgrove, Hiroki Saito, and Takuya Hirano
    Appl. Phys. Express 6, 052801 (2013)

  33. Dissipative structures of quantized vortices in a coherently pumped polariton superfluid
    Tomohiko Aioi, Tsuyoshi Kadokura, and Hiroki Saito
    Phys. Rev. B 87, 205312 (2013)
    arXiv:1302.4846

  34. Kibble-Zurek mechanism in a trapped ferromagnetic Bose-Einstein condensate
    Hiroki Saito, Yuki Kawaguchi, and Masahito Ueda
    J. Phys.: Condens. Matter 25, 404212 (2013)
    (Special issue on condensed matter analogues of cosmology)
    arXiv:1301.4770

  35. Order-disorder oscillations in exciton-polariton superfluids
    Hiroki Saito, Tomohiko Aioi, and Tsuyoshi Kadokura
    Phys. Rev. Lett. 110, 026401 (2013)
    arXiv:1208.4886

  36. Bénard-von Kármán vortex street in an exciton-polariton superfluid
    Hiroki Saito, Tomohiko Aioi, and Tsuyoshi Kadokura
    Phys. Rev. B 86, 014504 (2012)
    arXiv:1205.1611

  37. Penetration of a vortex dipole across an interface of Bose-Einstein condensates
    Tomohiko Aioi, Tsuyoshi Kadokura, and Hiroki Saito
    Phys. Rev. A 85, 023618 (2012)
    arXiv:1111.4028

  38. Rayleigh-Taylor instability in a two-component Bose-Einstein condensate with rotational symmetry
    Tsuyoshi Kadokura, Tomohiko Aioi, Kazuki Sasaki, Tetsuo Kishimoto, and Hiroki Saito
    Phys. Rev. A 85, 013602 (2012)
    arXiv:1111.1283

  39. Controlled generation and manipulation of vortex dipoles in a Bose-Einstein condensate
    Tomohiko Aioi, Tsuyoshi Kadokura, Tetsuo Kishimoto, and Hiroki Saito
    Phys. Rev. X 1, 021003 (2011)
    arXiv:1106.1314

  40. Capillary instability in a two-component Bose-Einstein condensate
    Kazuki Sasaki, Naoya Suzuki, and Hiroki Saito
    Phys. Rev. A 83, 053606 (2011)
    arXiv:1103.0383

  41. Dynamics of bubbles in a two-component Bose-Einstein condensate
    Kazuki Sasaki, Naoya Suzuki, and Hiroki Saito
    Phys. Rev. A 83, 033602 (2011)
    arXiv:1011.5578

  42. Crossover between Kelvin-Helmholtz and counter-superflow instabilities in two-component Bose-Einstein condensates
    Naoya Suzuki, Hiromitsu Takeuchi, Kenichi Kasamatsu, Makoto Tsubota, and Hiroki Saito
    Phys. Rev. A 82, 063604 (2010)
    See also Physics Synopsis
    arXiv:1009.1740

  43. Connection between rotation and miscibility in a two-component Bose-Einstein condensate
    Takayuki Shimodaira, Tetsuo Kishimoto, and Hiroki Saito
    Phys. Rev. A 82, 013647 (2010)
    arXiv:1008.0059

  44. Bénard-von Kármán vortex street in a Bose-Einstein condensate
    Kazuki Sasaki, Naoya Suzuki, and Hiroki Saito
    Phys. Rev. Lett. 104, 150404 (2010)
    arXiv:1002.2058

  45. Controlling phase separation of binary Bose-Einstein condensates via mixed-spin-channel Feshbach resonance
    Satoshi Tojo, Yoshihisa Taguchi, Yuta Masuyama, Taro Hayashi, Hiroki Saito, and Takuya Hirano
    Phys. Rev. A 82, 033609 (2010)
    arXiv:1007.2690

  46. Symmetry-breaking magnetization dynamics of spinor dipolar Bose-Einstein condensates
    Shoichi Hoshi and Hiroki Saito
    Phys. Rev. A 81, 013627 (2010)
    arXiv:0911.2741

  47. Rayleigh-Taylor instability and mushroom-pattern formation in a two-component Bose-Einstein condensate
    Kazuki Sasaki, Naoya Suzuki, Daisuke Akamatsu, and Hiroki Saito
    Phys. Rev. A 80, 063611 (2009)
    arXiv:0910.1440

  48. Quantum Kelvin-Helmholtz instability in phase-separated two-component Bose-Einstein condensates
    Hiromitsu Takeuchi, Naoya Suzuki, Kenichi Kasamatsu, Hiroki Saito, and Makoto Tsubota
    Phys. Rev. B 81, 094517 (2010)
    arXiv:0909.2144

  49. Spontaneous magnetic ordering in a ferromagnetic spinor dipolar Bose-Einstein condensate
    Yuki Kawaguchi, Hiroki Saito, Kazue Kudo, and Masahito Ueda
    Phys. Rev. A 82, 043627 (2010)
    arXiv:0909.0565

  50. Spin-dependent inelastic collisions in spin-2 Bose-Einstein condensates
    S. Tojo, T. Hayashi, T. Tanabe, T. Hirano, Y. Kawaguchi, H. Saito, and M. Ueda
    Phys. Rev. A 80, 042704 (2009)
    arXiv:0909.0489

  51. Comment on ``Fragmented metastable states exist in an attractive Bose-Einstein condensate for atom numbers well above the critical number of the Gross-Pitaevskii theory''
    Hiroki Saito
    Phys. Rev. Lett. 103, 018901 (2009)
    Comment on L. S. Cederbaum et al., Phys. Rev. Lett. 100, 040402 (2008)

  52. Coherent collapses of dipolar Bose-Einstein condensates for different trap geometries
    J. Metz, T. Lahaye, B. Fröhlich, A. Griesmaier, T. Pfau, H. Saito, Y. Kawaguchi, and M. Ueda
    New J. Phys. 11, 055032 (2009)
    arXiv:0901.1300

  53. Ferrofluidity in a two-component dipolar Bose-Einstein condensate
    Hiroki Saito, Yuki Kawaguchi, and Masahito Ueda
    Phys. Rev. Lett. 102, 230403 (2009)
    arXiv:0812.0278

  54. Magnetization of a half-quantum vortex in a spinor Bose-Einstein condensate
    Shoichi Hoshi and Hiroki Saito
    Phys. Rev. A 78, 053618 (2008)
    arXiv:0808.3315

  55. Spin-vortex nucleation in a Bose-Einstein condensate by a spin-dependent rotating trap
    Hiroki Chiba and Hiroki Saito
    Phys. Rev. A 78, 043602 (2008)
    arXiv:0806.3840

  56. Dynamical Casimir effect for magnons in a spinor Bose-Einstein condensate
    Hiroki Saito and Hiroyuki Hyuga
    Phys. Rev. A 78, 033605 (2008)
    arXiv:0805.2210

  57. d-wave collapse and explosion of a dipolar Bose-Einstein condensate
    T. Lahaye, J. Metz, B. Fröhlich, T. Koch, M. Meister, A. Griesmaier, T. Pfau, H. Saito, Y. Kawaguchi, and M. Ueda
    Phys. Rev. Lett. 101, 080401 (2008)
    See also Physics 1, 13 (2008) by M. Lewenstein
    arXiv:0803.2442

  58. Stabilization of a Bose-Einstein droplet by hyperfine Rabi oscillations
    Hiroki Saito, Randall G. Hulet, and Masahito Ueda
    Phys. Rev. A 76, 053619 (2007)
    arXiv:0707.4530

  59. Kibble-Zurek mechanism in a quenched ferromagnetic Bose-Einstein condensate
    Hiroki Saito, Yuki Kawaguchi, and Masahito Ueda
    Phys. Rev. A 76, 043613 (2007)
    arXiv:0704.1377

  60. Can Spinor Dipolar Effects be Observed in Bose-Einstein Condensates?
    Yuki Kawaguchi, Hiroki Saito, and Masahito Ueda
    Phys. Rev. Lett. 98, 110406 (2007)
    cond-mat/0611131

  61. Topological defect formation in a quenched ferromagnetic Bose-Einstein condensate
    Hiroki Saito, Yuki Kawaguchi, and Masahito Ueda
    Phys. Rev. A 75, 013621 (2007)
    cond-mat/0610862

  62. Broken-axisymmetry phase of a spin-1 ferromagnetic Bose-Einstein condensate
    Keiji Murata, Hiroki Saito, and Masahito Ueda
    Phys. Rev. A 75, 013607 (2007)
    cond-mat/0607184

  63. Spontaneous Circulation in Ground-State Spinor Dipolar Bose-Einstein Condensates
    Yuki Kawaguchi, Hiroki Saito, and Masahito Ueda
    Phys. Rev. Lett. 97, 130404 (2006)
    cond-mat/0606288

  64. Stabilization of a matter-wave droplet in free space by feedback control of interatomic interactions
    Hiroki Saito and Masahito Ueda
    Phys. Rev. A 74, 023602 (2006)
    cond-mat/0605206

  65. Breaking of chiral symmetry and spontaneous rotation in a spinor Bose-Einstein condensate
    Hiroki Saito, Yuki Kawaguchi, and Masahito Ueda
    Phys. Rev. Lett. 96, 065302 (2006)
    cond-mat/0512216

  66. Critical fluctuations in a soliton formation of attractive Bose-Einstein condensates
    Rina Kanamoto, Hiroki Saito, and Masahito Ueda
    Phys. Rev. A 73, 033611 (2006)
    cond-mat/0511684

  67. Einstein-de Haas Effect in Dipolar Bose-Einstein Condensates
    Yuki Kawaguchi, Hiroki Saito, and Masahito Ueda
    Phys. Rev. Lett. 96, 080405 (2006)
    cond-mat/0511052

  68. Diagnostics for the ground state phase of a spin-2 Bose-Einstein condensate
    Hiroki Saito and Masahito Ueda
    Phys. Rev. A 72, 053628 (2005)
    cond-mat/0506520

  69. Spontaneous magnetization and structure formation in a spin-1 ferromagnetic Bose-Einstein condensate
    Hiroki Saito and Masahito Ueda
    Phys. Rev. A 72, 023610 (2005)
    cond-mat/0504398

  70. Bose-Einstein droplet in free space
    Hiroki Saito and Masahito Ueda
    Phys. Rev. A 70, 053610 (2004)
    cond-mat/0407095

  71. Symmetry breaking and enhanced condensate fraction in a matter-wave bright soliton
    Rina Kanamoto, Hiroki Saito, and Masahito Ueda
    Phys. Rev. Lett. 94, 090404 (2005)
    cond-mat/0406740

  72. Emergence of Bloch bands in a rotating Bose-Einstein condensate
    Hiroki Saito and Masahito Ueda
    Phys. Rev. Lett. 93, 220402 (2004)
    cond-mat/0401228

  73. Split-merge cycle, fragmented collapse, and vortex disintegration in rotating Bose-Einstein condensates with attractive interactions
    Hiroki Saito and Masahito Ueda
    Phys. Rev. A 69, 013604 (2004)
    cond-mat/0306319

  74. Stability of the quantized circulation of an attractive Bose-Einstein condensate in a rotating torus
    Rina Kanamoto, Hiroki Saito, and Masahito Ueda
    Phys. Rev. A 68, 043619 (2003)
    cond-mat/0305307

  75. Measurement-induced spin squeezing in a cavity
    Hiroki Saito and Masahito Ueda
    Phys. Rev. A 68, 043820 (2003)
    cond-mat/0304127

  76. Quantum phase transition in one-dimensional Bose-Einstein condensates with attractive interactions
    Rina Kanamoto, Hiroki Saito, and Masahito Ueda
    Phys. Rev. A 67, 013608 (2003)
    cond-mat/0210229

  77. Dynamically stabilized bright solitons in a two-dimensional Bose-Einstein condensate
    Hiroki Saito and Masahito Ueda
    Phys. Rev. Lett. 90, 040403 (2003)
    cond-mat/0209053

  78. Split instability of a vortex in an attractive Bose-Einstein condensate
    Hiroki Saito and Masahito Ueda
    Phys. Rev. Lett. 89, 190402 (2002)
    cond-mat/0204363

  79. Dynamical Casimir effect without boundary conditions
    Hiroki Saito and Hiroyuki Hyuga
    Phys. Rev. A 65, 053804 (2002)
    quant-ph/0109043

  80. Mean-field analysis of collapsing and exploding Bose-Einstein condensates
    Hiroki Saito and Masahito Ueda
    Phys. Rev. A 65, 033624 (2002)
    cond-mat/0107248

  81. Power laws and collapsing dynamics of trapped Bose-Einstein condensates with attractive interactions
    Hiroki Saito and Masahito Ueda
    Phys. Rev. A 63, 043601 (2001)
    cond-mat/0006410

  82. Intermittent implosion and pattern formation of trapped Bose-Einstein condensates with attractive interaction
    Hiroki Saito and Masahito Ueda
    Phys. Rev. Lett. 86, 1406-1409 (2001)
    cond-mat/0002393

  83. First- and second-order coherence of scattered laser light from a trapped Bose-Einstein condensate
    Hiroki Saito and Masahito Ueda
    Phys. Rev. A 60, 3990-3998 (1999)
    cond-mat/9904104

  84. Squeezed few-photon states of the field generated from squeezed atoms
    Hiroki Saito and Masahito Ueda
    Phys. Rev. A 59, 3959-3974 (1999)
    quant-ph/9809035

  85. A Variational Sum-Rule Approach to Collective Excitations of a Trapped Bose-Einstein condensate
    Takashi Kimura, Hiroki Saito, and Masahito Ueda
    J. Phys. Soc. Jpn. 68, 1477-1480 (1999)

  86. Quantum-Controlled Few-Photon States Generated by Squeezed Atoms
    Hiroki Saito and Masahito Ueda
    Phys. Rev. Lett. 79, 3869-3872 (1997)
    quant-ph/9708023

  87. The Dynamical Casimir Effect for an Oscillating Dielectric Model
    Hiroki Saito and Hiroyuki Hyuga
    J. Phys. Soc. Jpn. 65, 3513-3523 (1996)

  88. Relaxation of Schroedinger Cat States and Displaced Thermal States in a Density Operator Representation
    Hiroki Saito and Hiroyuki Hyuga
    J. Phys. Soc. Jpn. 65, 1648-1654 (1996)

  89. Photon Emission from a Time-Varying Dielectric Medium in a Cavity
    Hiroki Saito and Hiroyuki Hyuga
    J. Phys. Soc. Jpn. 65, 1139-1142 (1996)

Books and Reviews

  1. 微弱な磁気双極子相互作用によるボース・アインシュタイン凝縮体 スピンの空間構造形成:磁性気体としての冷却Rb原子
    衛藤雄二郎, 斎藤弘樹, 平野琢也
    日本物理学会誌 70, 614-619 (2015)

  2. 磁気双極子相互作用するボース・アインシュタイン凝縮体
    斎藤弘樹, 川口由紀, 上田正仁
    固体物理 46 21-28 (2011)

  3. 磁気双極子相互作用するボース・アインシュタイン凝縮体
    川口由紀, 斎藤弘樹, 上田正仁
    日本物理学会誌 64, 623-627 (2009)

  4. 磁性超流動体におけるスーパーノヴァ
    斎藤弘樹, 川口由紀, 上田正仁
    科学 Vol. 79, No. 2, 139-141 (2009)

  5. Topological defect formation in spinor and dipolar Bose-Einstein condensates
    Hiroki Saito, Yuki Kawaguchi, and Masahito Ueda
    Electromagnetic, Magnetostatic, and Exchange-Interaction Vortices in Confined Magnetic Structures, edited by E. O. Kamenetskii (pp107-131, Transworld Research Network, 2008)

  6. Vortex lattices in Bose-Einstein condensates: Theory
    Masahito Ueda and Hiroki Saito
    Emergent Nonlinear Phenomena in Bose-Einstein Condensates, edited by P. G. Kevrekidis, D. J. Frantzeskakis, and R. C-. Gonzalez (pp211-227, Springer, 2007)

  7. ひとりでにできる量子渦
    斎藤弘樹
    パリティ Vol. 22, No. 01, 13-14 (2007)

  8. 原子気体のボース・アインシュタイン凝縮
    斎藤弘樹
    数理科学 No. 496, 33-39 (2004)

  9. 引力相互作用するボース・アインシュタイン凝縮体の動的振る舞い
    斎藤弘樹, 上田正仁
    日本物理学会誌 58, 607-610 (2003)

  10. レーザー冷却された中性原子気体のボース・アインシュタイン凝縮 〜引 力系を中心として〜
    斎藤弘樹, 上田正仁
    固体物理 36, 311-319 (2001)

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