573 citations · 1.3k across the 33 of their papers we have counts for
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Proposed Fermi-surface reservoir-engineering and application to realizing unconventional Fermi superfluids
Taira Kawamura, Ryo Hanai, Yoji Ohashi
We theoretically propose an idea based on reservoir engineering to process the structure of a Fermi edge to split into multiple Fermi edges, so as to be suitable for the state whic…
Proposed Fermi-surface reservoir-engineering and application to realizing unconventional Fermi superfluids in a driven-dissipative non-equilibrium Fermi gas
Taira Kawamura, Ryo Hanai, Yoji Ohashi
We develop a theory to describe the dynamics of a driven-dissipative many-body Fermi system, to pursue our proposal to realize exotic quantum states based on reservoir engineering.…
Direct observation of the quantum-fluctuation driven amplitude mode in a microcavity polariton condensate
Mark Steger, Ryo Hanai, Alexander Orson Edelman +7
The Higgs amplitude mode is a collective excitation studied and observed in a broad class of matter, including superconductors, charge density waves, antiferromagnets, 3He p-wave s…
Non-equilibrium strong-coupling theory for a driven-dissipative ultracold Fermi gas in the BCS-BEC crossover region
Taira Kawamura, Ryo Hanai, Daichi Kagamihara +2
We theoretically investigate strong-coupling properties of an ultracold Fermi gas in the BCS-BEC crossover regime in the non-equilibrium steady state, being coupled with two fermio…
Pseudogap regime of a two-dimensional uniform Fermi gas
Morio Matsumoto, Ryo Hanai, Daisuke Inotani +1
We investigate pseudogap phenomena in a two-dimensional Fermi gas. Including pairing fluctuations within a self-consistent -matrix approximation, we determine the pseudogap temp…
Spin susceptibility and effects of a harmonic trap in the BCS-BEC crossover regime of an ultracold Fermi gas
Hiroyuki Tajima, Ryo Hanai, Yoji Ohashi
We theoretically investigate magnetic properties of a trapped ultracold Fermi gas. Including pairing fluctuations within the framework of an extended -matrix approximation (ETMA…
Single-particle Excitations and Effects of Hetero-pairing Fluctuations in a Bose-Fermi Mixture with a Feshbach Resonance
Digvijay Kharga, Daisuke Inotani, Ryo Hanai +1
We theoretically investigate normal-state properties of a gas mixture of single-component bosons and fermions with a hetero-nuclear Feshbach resonance. Including strong hetero-pair…
Strong-coupling corrections to ground-state properties of a superfluid Fermi gas
Hiroyuki Tajima, Pieter van Wyk, Ryo Hanai +4
We theoretically present an economical and convenient way to study ground-state properties of a strongly interacting superfluid Fermi gas. Our strategy is that complicated strong-c…
Local Photoemission Spectra and Effects of Spatial Inhomogeneity in the BCS-BEC Crossover Regime of a Trapped Ultracold Fermi Gas
Miki Ota, Hiroyuki Tajima, Ryo Hanai +2
We theoretically investigate single particle excitations in the BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein-Condensation) crossover regime of an ultracold Fermi gas. Includi…
Pseudogap phenomena near the BKT transition of a two-dimensional ultracold Fermi gas in the crossover region
Morio Matsumoto, Ryo Hanai, Daisuke Inotani +1
We investigate strong-coupling properties of a two-dimensional ultracold Fermi gas in the normal phase. In the three-dimensional case, it has been shown that the so-called pseudoga…
Triplet pair amplitude in a trapped -wave superfluid Fermi gas with broken spin rotation symmetry. II. Three dimensional continuum case
Daisuke Inotani, Ryo Hanai, Yoji Ohashi
We extend our recent work [Y. Endo et. al., Phys. Rev. 92, 023610 (2015)] for a parity-mixing effect in a model two-dimensional lattice fermions to a realistic three-dimensional ul…
Specific heat and effects of pairing fluctuations in the BCS-BEC crossover regime of an ultracold Fermi gas
Pieter van Wyk, Hiroyuki Tajima, Ryo Hanai +1
We investigate the specific heat at constant volume in the BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover regime of an ultracold Fermi gas above t…
Spin susceptibility and effects of inhomogeneous strong pairing fluctuations in a trapped ultracold Fermi gas
Hiroyuki Tajima, Ryo Hanai, Yoji Ohashi
We theoretically investigate magnetic properties of a unitary Fermi gas in a harmonic trap. Including strong pairing fluctuations within the framework of an extended -matrix app…
Strong Coupling Effects on the Specific Heat of an Ultracold Fermi Gas in the Unitarity Limit
Pieter van Wyk, Hiroyuki Tajima, Ryo Hanai +1
We investigate strong-coupling corrections to the specific heat in the normal state of an ultracold Fermi gas in the BCS-BEC crossover region. A recent experiment on a Li…
Triplet pair amplitude in a trapped -wave superfluid Fermi gas with broken spin rotation symmetry
Yuki Endo, Daisuke Inotani, Ryo Hanai +1
We investigate the possibility that the broken spatial inversion symmetry by a trap potential induces a spin-triplet Cooper-pair amplitude in an -wave superfluid Fermi gas. Bein…
Hetero pairing and component-dependent pseudogap phenomena in an ultracold Fermi gas with mass imbalance
Ryo Hanai, Yoji Ohashi
We investigate the superfluid phase transition and single-particle excitations in the BCS (Bareen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover regime of an ultraco…
Uniform spin susceptibility and spin-gap phenomenon in the BCS-BEC crossover regime of an ultracold Fermi gas
H. Tajima, T. Kashimura, R. Hanai +2
We investigate the uniform spin susceptibility in the BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover regime of an ultracold Fermi gas. Inclu…
Excitation properties and effects of mass imbalance in the BCS-BEC crossover regime of an ultracold Fermi gas
Ryo Hanai, Takashi Kashimura, Ryota Watanabe +2
We investigate single-particle properties of a mass-imbalanced Fermi gas in the BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover region. In the presence o…
Strong-Coupling Effects and Single-Particle Properties in an Ultracold Fermi Gas with Mass Imbalance
Ryo Hanai, Yoji Ohashi
We investigate single-particle properties of a strongly interacting ultracold Fermi gas with mass imbalance. Using an extended -matrix theory, we calculate the density of states…
Spin Susceptibility and Strong Coupling Effects in an Ultracold Fermi Gas
Hiroyuki Tajima, Ryo Hanai, Ryota Watanabe +1
We investigate magnetic properties and strong coupling corrections in the BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover regime of an ultracold Fermi ga…
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…