Extension to the Quantum Langevin Equation in the Incoherent Hopping Regime

Details Extension to the Quantum Langevin Equation in the Incoherent Hopping Regime Extension to the Quantum Langevin Equation in the Incoherent Hopping Regime

2005-08-10

arxiv.org/abs/cond-mat/0508261v1

Physics

Condensed Matter

Other Condensed Matter

4 pages 1 figure

Scientific paper

10.1103/PhysRevB.73.140506

An extension to the quantum Langevin equation is derived, that is valid in the incoherent hopping regime, and which allows one to incorporate quantum tunneling events. This is achieved by the inclusion of additional stochastic variables in the Langevin equation representing the tunneling events. A systematic derivation of this extension and of its regime of validity is presented. The study is motivated by efforts to determine the error in reading the state of a super-conducting quantum bit.

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