15 citations · 56 across the 12 of their papers we have counts for
13 papers
Nonequilibrium Quasiparticle Effects on Domain Wall Dynamics in Superconductors
Takuma Kanakubo, Taira Kawamura, Yusuke Kato
We study the dynamics of a domain wall (DW) in a type-II superconductor connected to two heat reservoirs. We employ a generalized time-dependent Ginzburg--Landau framework in which…
Time-local nonequilibrium Green's function method for real-time dynamics in quantum systems coupled to superconducting leads
Taira Kawamura
We develop a time-local nonequilibrium Green's function formulation for real-time dynamics in quantum systems coupled to superconducting leads. The superconducting lead self-energy…
Emergence of Charge-Imbalanced BCS State and Suppression of Nonequilibrium FFLO State in Asymmetric NSN Junctions
Taira Kawamura, Yoji Ohashi
We theoretically study nonequilibrium superconductivity in voltage-biased normal metal-superconductor-normal metal (NSN) junctions, focusing on effects of lead-coupling asymmetry a…
Engineering nonequilibrium superconducting phases in a voltage-driven superconductor under an external magnetic field
Taira Kawamura, Yoji Ohashi
We theoretically investigate nonequilibrium properties of a normal metal-superconductor-normal metal (NSN) junction under an external magnetic field. When a bias voltage is applied…
Nonequilibrium electron distribution function in a voltage-biased nanowire: A nonequilibrium Green's function approach
Taira Kawamura, Yusuke Kato
We develop a theoretical framework to determine distribution functions in nonequilibrium systems coupled to equilibrium reservoirs, by using the nonequilibrium Green's function tec…
Nonequilibrium BCS-BEC crossover and unconventional FFLO superfluid in a strongly interacting driven-dissipative Fermi gas
Taira Kawamura, Yoji Ohashi
We present a theoretical review of the recent progress in nonequilibrium BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover physics. As a paradigmatic examp…
Pairing properties of an odd-frequency superfluid Fermi gas
Shumpei Iwasaki, Taira Kawamura, Koki Manabe +1
We theoretically investigate strong-coupling properties of an odd-frequency Fermi superfluid. This pairing state has the unique property that Cooper pairs are formed between fermio…
Emergence of Larkin-Ovchinnikov-type superconducting state in a voltage-driven superconductor
Taira Kawamura, Yoji Ohashi, H. T. C. Stoof
We theoretically investigate a voltage-biased normal metal-superconductor-normal metal (N-S-N) junction. Using the nonequilibrium Green's function technique, we derive a quantum ki…
Stable non-equilibrium Fulde-Ferrell-Larkin-Ovchinnikov state in a spin-imbalanced driven-dissipative Fermi gas loaded on a three-dimensional cubic optical lattice
Taira Kawamura, Daichi Kagamihara, Yoji Ohashi
We theoretically investigate a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) type superfluid phase transition in a driven-dissipative two-component Fermi gas. The system is assumed to be…
Feasibility of a Fulde-Ferrell-Larkin-Ovchinnikov superfluid Fermi atomic gas
Taira Kawamura, Yoji Ohashi
We theoretically explore a promising route to achieve the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state in a spin-imbalanced ultracold Fermi gas. In the current stage of cold atom…
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.…
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…