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Open-system nonequilibrium Green's functions and quantum transport in the transient regime

Irena Knezevic and David K Ferry

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We present a generalization of the nonequilibrium Green's function formalism to the treatment of dynamically open systems, such as the active region of a modern small semiconductor structure. This approach relies on the partial-trace-free, time-convolutionless approach to the open-system reduced density matrix. We illustrate how one can analyse the short-time evolution of an open system within the present approach, and obtain corrections to the single-particle spectrum and level broadening.


PACS

02.30.-f Function theory, analysis

73.23.-b Electronic transport in mesoscopic systems

Subjects

Mathematical physics

Surfaces, interfaces and thin films

Dates

Issue 4 (April 2004)

Received 28 July 2003

Published 8 March 2004



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