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Journal of the Physical Society of Japan, ISSN 0031-9015, 2019, Volume 88, Issue 2, p. 23601
In quantum many-body systems with spontaneous breaking of a continuous symmetry, Higgs modes emerge as collective amplitude oscillations of order parameters.... 
DENSITY | AMPLITUDE MODE | PHYSICS, MULTIDISCIPLINARY | SUPERCONDUCTORS | Time dependence | Fluids | Amplitudes | Breaking | Wave scattering | Oscillations | Order parameters | Excitation | Superfluidity | Crossovers
Journal Article
2009, ISBN 9780521837026, Volume 9780521837026, xi, 462
The discovery of Bose Einstein condensation (BEC) in trapped ultracold atomic gases in 1995 has led to an explosion of theoretical and experimental research on... 
Physics | Bose-Einstein condensation | Bose-Einstein gas
Book
Journal of Low Temperature Physics, ISSN 0022-2291, 7/2019, Volume 196, Issue 1, pp. 140 - 146
We study relaxation dynamics of dark soliton, created by a phase-imprinted method, in a two-dimensional trapped Bose–Einstein condensate at nonzero... 
Condensed Matter Physics | Decay | Bose–Einstein condensate | Soliton | Nonzero temperature | Characterization and Evaluation of Materials | Physics | Magnetism, Magnetic Materials | PHYSICS, CONDENSED MATTER | PHYSICS, APPLIED | Bose-Einstein condensate | Snakes
Journal Article
Journal of Low Temperature Physics, ISSN 0022-2291, 7/2019, Volume 196, Issue 1, pp. 133 - 139
Journal Article
Journal of Low Temperature Physics, ISSN 0022-2291, 06/2017, Volume 187, Issue 5-6, pp. 765 - 770
In quantum many-body systems with spontaneous breaking of a continuous symmetry, Higgs modes emerge as collective amplitude oscillations of order parameters.... 
Superfluid Fermi gas | Higgs mode | Time-dependent Bogoliubov–de Gennes equation | PHYSICS, CONDENSED MATTER | PHYSICS, APPLIED | Time-dependent Bogoliubov-de Gennes equation
Journal Article
Journal of Physics: Conference Series, ISSN 1742-6588, 2012, Volume 400, Issue 1, pp. 1 - 4
We study the equilibrium and dynamical properties of dipolar Fermi gases at finite temperatures within the semiclassical treatment. The equilibrium property is... 
Dynamic tests | Fluid dynamics | Mathematical analysis | Fluid flow | Oscillations | Fermi gases | Quadrupoles | Dipole moment
Conference Proceeding
Physical Review B - Condensed Matter and Materials Physics, ISSN 1098-0121, 07/2013, Volume 88, Issue 1
We study the Higgs amplitude mode in the s-wave superfluid state on the honeycomb lattice inspired by recent cold atom experiments. We consider the attractive... 
PHYSICS, CONDENSED MATTER | PHASE | SUPERCONDUCTIVITY | PARTICLES | HONEYCOMB LATTICE | FLUCTUATIONS | COLLECTIVE MODES | CHARGE-DENSITY WAVES | HUBBARD-MODEL
Journal Article
Journal of the Physical Society of Japan, ISSN 0031-9015, 2018, Volume 87, Issue 8, p. 85003
We investigate a quantum spatial search problem on a fractal lattice. A recent study for the Sierpinski gasket and tetrahedron made a conjecture that the... 
PHYSICS, MULTIDISCIPLINARY | Physics - Quantum Physics
Journal Article
Journal of the Physical Society of Japan, ISSN 0031-9015, 2009, Volume 78, Issue 9, pp. 094005 - 094005
We study population dynamics of a trapped spin-1 Bose gas above the Bose-Einstein transition temperature. Starting from the semiclassical kinetic equation for... 
finite temperature | spinor Bose gas | population dynamics | Finite temperature | Population dynamics | Spinor Bose gas | CONDENSATE | GROUND-STATE | PHYSICS, MULTIDISCIPLINARY | Physics - Other Condensed Matter
Journal Article
Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, 01/2018, Volume 51, Issue 5, p. 55202
Journal Article
Physical Review A - Atomic, Molecular, and Optical Physics, ISSN 1050-2947, 10/2014, Volume 90, Issue 4
We present a theory for the emission of fermion pairs from a superfluid Fermi gas induced by photon absorption. In solid-state physics, this type of process is... 
PHOTOEMISSION | PHYSICS, ATOMIC, MOLECULAR & CHEMICAL | OPTICS | Physics - Quantum Gases
Journal Article
Physical Review A - Atomic, Molecular, and Optical Physics, ISSN 1050-2947, 10/2015, Volume 92, Issue 4
We study collective modes of superfluid Bose gases in optical lattices combined with potential barriers. We assume that the system is in the vicinity of the... 
RAMAN-SCATTERING | BOSON | QUANTUM PHASE-TRANSITION | INSULATOR TRANSITION | SPECTROSCOPY | FIELD | PHYSICS, ATOMIC, MOLECULAR & CHEMICAL | CHARGE-DENSITY WAVES | DYNAMICS | SUPERCONDUCTING-GAP EXCITATIONS | OPTICS | SUPERFLUID
Journal Article
J Phys Soc Jpn, ISSN 0031-9015, 2/2012, Volume 81, Issue 2, pp. 024001 - 024001-6
We study the ground-state properties of mixtures of strongly interacting two-component bosonic atoms in an optical lattice. Applying a mean-field approximation... 
Hubbard model | Quantum phase transition | Multicomponent condensates | Optical lattice | TRANSITION | quantum phase transition | PHYSICS, MULTIDISCIPLINARY | MOTT INSULATOR | ATOMS | multicomponent condensates | optical lattice
Journal Article
J Phys Soc Jpn, ISSN 0031-9015, 4/2011, Volume 80, Issue 4, pp. 044006 - 044006-12
We study the equilibrium properties of dipolar Bose and Fermi gases at finite temperatures. We have recently developed a variational ansatz for the phase-space... 
Fermi gas | Bose gas | Ultracold atoms | Finite temperatures | Quantum statistics | Variational method | Dipolar gas | Ultracold molecules | ultracold molecules | finite temperatures | quantum statistics | PHYSICS, MULTIDISCIPLINARY | variational method | ultracold atoms | dipolar gas
Journal Article
Physical Review A - Atomic, Molecular, and Optical Physics, ISSN 1050-2947, 10/2009, Volume 80, Issue 4
Journal Article
Physical Review Letters, ISSN 0031-9007, 04/2013, Volume 110, Issue 14, p. 145304
We study the superfluid state of atomic fermions in a tunable optical kagome lattice motivated by recent experiments. We show that the imposed superflow... 
FERROMAGNETISM | HE-3 | MODELS | PHYSICS, MULTIDISCIPLINARY | GROUND-STATES | ANTIFERROMAGNETISM
Journal Article
Physical Review A - Atomic, Molecular, and Optical Physics, ISSN 1050-2947, 08/2012, Volume 86, Issue 2
We study the stability of superflow of Bose gases in optical lattices by analyzing the Bose-Hubbard model within the Gutzwiller mean-field approximation. We... 
TRANSITION | INSTABILITY | PHYSICS, ATOMIC, MOLECULAR & CHEMICAL | MOTT INSULATOR | ATOMS | OPTICS | EINSTEIN CONDENSATE
Journal Article
Physical Review A - Atomic, Molecular, and Optical Physics, ISSN 1050-2947, 09/2010, Volume 82, Issue 3
We study the effect of atom-molecule internal tunneling on the ground state of atom-molecule Bose-Einstein condensates in a double-well potential. In the... 
DYNAMICS | PHYSICS, ATOMIC, MOLECULAR & CHEMICAL | OPTICS | CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS | ATOMIC AND MOLECULAR PHYSICS | INTERATOMIC FORCES | POTENTIALS | ENERGY LEVELS | BOSE-EINSTEIN CONDENSATION | MOLECULES | SYMMETRY | RESONANCE | FERMI GAS | ATOMS | BCS THEORY | TUNNEL EFFECT | GROUND STATES
Journal Article
Physical Review A - Atomic, Molecular, and Optical Physics, ISSN 1050-2947, 06/2010, Volume 81, Issue 6
Journal Article
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