Dynamical bistability in the driven circuit QED

被引：21

作者：

Peano, V. ^{[1
,3
]}

Thorwart, M. ^{[2
,3
]}

机构：

[1] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany

[2] Univ Freiburg, FRIAS, D-79104 Freiburg, Germany

[3] Univ Dusseldorf, Inst Theoret Phys, D-40225 Dusseldorf, Germany

来源：

EPL | 2010年 / 89卷 / 01期

关键词：

NONLINEAR RESPONSE; JAYNES-CUMMINGS; QUANTUM; OSCILLATOR; REGIME; STATES;

D O I：

10.1209/0295-5075/89/17008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the nonlinear response of a driven circuit quantum electrodynamics setup displays antiresonant multiphoton transitions, as recently observed in a transmon qubit device. By including photon leaking, we explain the lineshape by a perturbative and a semiclassical analysis. We derive a bistable semiclassical quasienergy surface whose lowest quasienergy eigenstate is squeezed, allowing to de. ne a squeezing-dependent local effective temperature. We study the escape dynamics out of the metastable state and find signatures of dynamical tunneling, similar as for the quantum Duffing oscillator. Copyright (C) EPLA, 2010

引用

页数：6

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