Superoperator Many-body Theory of Molecular Currents: Non-equilibrium Green Functions in Real Time

Details Superoperator Many-body Theory of Molecular Currents: Non-equilibrium Green Functions in Real Time Superoperator Many-body Theory of Molecular Currents: Non-equilibrium Green Functions in Real Time

2004-08-18

arxiv.org/abs/quant-ph/0408111v1

Physics

Quantum Physics

16 pages, no figure

Scientific paper

The electric conductance of a molecular junction is calculated by recasting
the Keldysh formalism in Liouville space. Dyson equations for nonequilibrium
many body Green's functions (NEGF) are derived directly in real (physical)
time. The various NEGFs appear naturally in the theory as time ordered products
of superoperators, while the Keldysh forward/backward time loop is avoided.

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