Nonlinear dispersive regime of cavity QED: The dressed dephasing model

被引：68

作者：

Boissonneault, Maxime ^{[1
]}

Gambetta, J. M. ^{[2
,3
,4
]}

Blais, Alexandre ^{[1
]}

机构：

[1] Univ Sherbrooke, Dept Phys & Regroupement Quebecois Mat Pointe, Sherbrooke, PQ J1K 2R1, Canada

[2] Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada

[3] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

[4] Griffith Univ, Ctr Quantum Dynam, Ctr Quantum Comp Technol, Brisbane, Qld 4111, Australia

来源：

PHYSICAL REVIEW A | 2008年 / 77卷 / 06期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1103/PhysRevA.77.060305

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Systems in the dispersive regime of cavity quantum electrodynamics (QED) are approaching the limits of validity of the dispersive approximation. We present a model which takes into account nonlinear corrections to the dressing of the atom by the field. We find that in the presence of pure dephasing, photons populating the cavity act as a heat bath on the atom, inducing incoherent relaxation and excitation. These effects are shown to reduce the achievable signal-to-noise ratio in cavity QED realizations where the atom is measured indirectly through cavity transmission and in particular in circuit QED.

引用

页数：4

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