# Time-loop formalism for irreversible quantum problems : Steady-state transport in junctions with asymmetric dynamics

@article{Kakashvili2008TimeloopFF, title={Time-loop formalism for irreversible quantum problems : Steady-state transport in junctions with asymmetric dynamics}, author={Paata Kakashvili and Carlos Bolech}, journal={Physical Review B}, year={2008}, volume={78} }

Non-unitary quantum mechanics has been used in the past to study irreversibility, dissipation and decay in a variety of physical systems. In this letter, we propose a general scheme to deal with systems governed by non-Hermitian Hamiltonians. We argue that the Schwinger-Keldysh formalism gives a natural description for those problems. To elucidate the method, we study a simple model inspired by mesoscopic physics --an asymmetric junction. The system is governed by a non-Hermitian Hamiltonian…

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