Continuous weak measurement and feedback control of a solid-state charge qubit: physical unravelling of non-Lindblad master equation

Details Continuous weak measurement and feedback control of a solid-state charge qubit: physical unravelling of non-Lindblad master equation Continuous weak measurement and feedback control of a solid-state charge qubit: physical unravelling of non-Lindblad master equation

2006-11-20

arxiv.org/abs/cond-mat/0611513v1

Phys.Rev.B 75,155304 (2007).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 5 figures

Scientific paper

Conventional quantum trajectory theory developed in quantum optics is largely based on the physical unravelling of Lindbald-type master equation, which constitutes the theoretical basis of continuous quantum measurement and feedback control. In this work, in the context of continuous quantum measurement and feedback control of a solid-state charge qubit, we present a physical unravelling scheme of non-Lindblad type master equation. Self-consistency and numerical efficiency are well demonstrated. In particular, the control effect is manifested in the detector noise spectrum, and the effect of measurement voltage is discussed.

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