Quantum correction to the Kubo formula in closed mesoscopic systems

Article

关键词: ZENER TRANSITIONS;    LOW-TEMPERATURES;    AC CONDUCTIVITY;    SIGMA-MODEL;    SUPERCONDUCTORS;    DISSIPATION;   

DOI  :  10.1103/PhysRevB.68.041306

来源: SCIE

【 摘 要 】

We study the energy dissipation rate in a mesoscopic system described by the parametrically driven random-matrix Hamiltonian H[phi(t)] for the case of linear bias phi = vt. We develop a Keldysh sigma-model approach to treat kinetics in such a system and use it to calculate the quantum correction to the Kubo result, which reveals the original discreteness of the energy spectrum. The first correction to the system viscosity scales} proportional tonu(-2/3) in the orthogonal case and vanishes in the unitary case.

【 授权许可】

Free