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Extension to the quantum Langevin equation in the incoherent hopping regime

Green, AG; (2006) Extension to the quantum Langevin equation in the incoherent hopping regime. Physical Review B , 73 (14) , Article 140506. 10.1103/PhysRevB.73.140506. Green open access

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Abstract

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 superconducting quantum bit.

Type: Article
Title: Extension to the quantum Langevin equation in the incoherent hopping regime
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevB.73.140506
Publisher version: http://dx.doi.org/10.1103/PhysRevB.73.140506
Language: English
Additional information: © APS 2006
Keywords: Oscillator, State, Decay, Transitions, Junction, Motion, System, Field
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/1333476
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