Monitoring entanglement evolution and collective quantum dynamics

被引：4

作者：

Reuther, Georg M. ^{[1
]}

Zueco, David ^{[2
,3
]}

Haenggi, Peter ^{[1
]}

Kohler, Sigmund ^{[4
]}

机构：

[1] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany

[2] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[3] Univ Zaragoza, CSIC, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[4] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 01期

关键词：

BROWNIAN MOTORS; STATE; SPECTROSCOPY; CIRCUIT; DRIVEN; QUBITS; DECOHERENCE; OSCILLATOR; SYSTEM; MODEL;

D O I：

10.1103/PhysRevB.83.014303

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We generalize a recently developed scheme for monitoring coherent quantum dynamics with good time resolution and low backaction [Reuther et al., Phys. Rev. Lett. 102, 033602 (2009)] to the case of more complex quantum dynamics of one or several qubits. The underlying idea is to measure with lock-in techniques the response of the quantum system to a high-frequency ac field. We demonstrate that this scheme also allows one to observe quantum dynamics with many frequency scales, such as that of a qubit undergoing Landau-Zener transitions. Moreover, we propose how to measure the entanglement between two qubits as well as the collective dynamics of qubit arrays.

引用

页数：10

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