Korshunov instantons out of equilibrium

Abstract

Zero-dimensional dissipative action possesses non-trivial minima known as Korshunov instantons. They have been known so far only for imaginary time representation that is limited to equilibrium systems. In this work we reconstruct and generalise Korshunov instantons using real-time Keldysh approach. This allows us to formulate the dissipative action theory for generic non-equilibrium conditions. Possible applications of the theory to transport in strongly biased quantum dots are discussed..

6 pages, 2 figures

References in corpus (3)

• Scattering Approach to Counting Statistics in Quantum Pumps
• Nonequilibrium dephasing in Coulomb blockade quantum dots
• Zero bias anomaly out of equilibrium

Cited by in corpus (7)

• Fractional Coulomb blockade in a coupling controlled metallic quantum dot
• Strong non-equilibrium effects in spin torque systems
• Thermal decay of the Coulomb blockade oscillations
• Two-instanton approximation to the Coulomb blockade problem
• Instantons in the out-of-equilibrium Coulomb blockade
• Korshunov instantons in a superconductor at elevated bias current
• Coulomb blockade of chiral Majorana and complex fermions far from equilibrium