975 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- The University of TokyoJP429 papers
- Kyoto UniversityJP151 papers
- RIKENJP142 papers
- Tokyo Institute of TechnologyJP134 papers
- High Energy Accelerator Research OrganizationJP100 papers
- Tohoku UniversityJP100 papers
- Nagoya UniversityJP97 papers
- The University of OsakaJP96 papers
- Tokyo University of ScienceJP90 papers
- Japan Science and Technology AgencyJP68 papers
- UNSW SydneyAU63 papers
- Centre National de la Recherche ScientifiqueFR62 papers
13 papers · 2 filters
Coexistence of superfluid gap and pseudogap in the BCS-BEC crossover regime of a trapped Fermi gas below
Ryota Watanabe, Shunji Tsuchiya, Yoji Ohashi
We investigate strong pairing fluctuations and effects of a harmonic trap in the superfluid phase of an ultracold Fermi gas. Including amplitude and phase fluctuations of the inhom…
Spin susceptibility and fluctuation corrections in the BCS-BEC crossover regime of an ultracold Fermi gas
Takashi Kashimura, Ryota Watanabe, Yoji Ohashi
We investigate magnetic properties and effects of pairing fluctuations in the BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover regime of an ultracold Ferm…
Excitation Transport through a Domain Wall in a Bose-Einstein Condensate
Shohei Watabe, Yusuke Kato, Yoji Ohashi
We investigate the tunneling properties of collective excitations through a domain wall in the ferromagnetic phase of a spin-1 spinor Bose--Einstein condensate. Within the mean-fie…
Superfluid phase transition and strong-coupling effects in an ultracold Fermi gas with mass imbalance
Ryo Hanai, Takashi Kashimura, Ryota Watanabe +2
We investigate the superfluid phase transition and effects of mass imbalance in the BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover regime of an cold Fer…
Magnetic properties and strong-coupling corrections in an ultracold Fermi gas with population imbalance
Takashi Kashimura, Ryota Watanabe, Yoji Ohashi
We investigate magnetic properties of an ultracold Fermi gas with population imbalance. In the presence of population imbalance, the strong-coupling theory developed by Nozieres an…
Superfluid properties of one-component Fermi gas with an anisotropic p-wave interaction
Daisuke Inotani, Manfred Sigrist, Yoji Ohashi
We investigate superfluid properties and strong-coupling effects in a one-component Fermi gas with an anisotropic p-wave interaction. Within the framework of the Gaussian fluctuati…
Two-dimensional pseudogap effects of an ultracold Fermi gas in the BCS-BEC crossover region
Ryota Watanabe, Shunji Tsuchiya, Yoji Ohashi
We investigate pseudogap phenomena originating from pairing fluctuations in the BCS-BEC crossover regime of a two-dimensional Fermi gas in a harmonic trap. Including pairing fluctu…
Superfluidity of Dirac Fermions in a Tunable Honeycomb Lattice: Cooper Pairing, Collective Modes, and Critical Currents
Shunji Tsuchiya, R. Ganesh, Arun Paramekanti
Motivated by recent experiments on atomic Dirac fermions in a tunable honeycomb optical lattice, we study the attractive Hubbard model of superfluidity in the anisotropic honeycomb…
Tachyon Condensation Due to Domain-Wall Annihilation in Bose-Einstein Condensates
Hiromitsu Takeuchi, Kenichi Kasamatsu, Makoto Tsubota +1
We show theoretically that a domain-wall annihilation in two-component Bose-Einstein condensates causes tachyon condensation accompanied by spontaneous symmetry breaking in a two-d…
Stable Skyrmions in SU(2) Gauged Bose-Einstein Condensates
Takuto Kawakami, Takeshi Mizushima, Muneto Nitta +1
We demonstrate that the three-dimensional Skyrmion, which has remained elusive so far, spontaneously appears as the ground state of (2) symmetric Bose-Einstein condensates coup…
Topological classification of vortex-core structures of spin-1 Bose-Einstein condensates
Shingo Kobayashi, Yuki Kawaguchi, Muneto Nitta +1
We classify vortex-core structures according to the topology of the order parameter space. By developing a method to characterize how the order parameter changes inside the vortex…
Creating vortons and three-dimensional skyrmions from domain wall annihilation with stretched vortices in Bose-Einstein condensates
Muneto Nitta, Kenichi Kasamatsu, Makoto Tsubota +1
We propose a mechanism to create a vorton or three-dimensional skyrmion in phase-separated two-component BECs with the order parameters Psi_1 and Psi_2 of the two condensates. We c…
Vortex trimer in three-component Bose-Einstein condensates
Minoru Eto, Muneto Nitta
Vortex trimer is predicted in three-component Bose-Einstein condensates with internal coherent couplings. The molecule is made by three constituent vortices which are bounded by do…