4 papers
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…
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…
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…