Quantum-feedback-control induced bifurcation and its application to qubit readout

被引：0

作者：

Zhang, Jing ^{[1
]}

Wu, Re-bing ^{[1
]}

Liu, Yu-xi ^{[2
]}

Li, Chun-wen ^{[1
]}

Tarn, Tzyh-Jong ^{[3
]}

机构：

[1] Tsinghua Univ, Dept Automat, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Inst Microelect, Beijing 100084, Peoples R China

[3] Washington Univ, Dept Elect & Syst Engn, St Louis, MO 63130 USA

来源：

PROCEEDINGS OF THE 48TH IEEE CONFERENCE ON DECISION AND CONTROL, 2009 HELD JOINTLY WITH THE 2009 28TH CHINESE CONTROL CONFERENCE (CDC/CCC 2009) | 2009年

基金：

中国国家自然科学基金;

关键词：

SYSTEMS;

D O I：

10.1109/CDC.2009.5400125

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Sensitive measurement of the state of a qubit is crucial to the implementation of quantum information processing. This paper proposes a strategy to utilize a static bifurcation induced by nonlinear quantum feedback control to read out the state of a charge qubit that is dispersively coupled to a transmission line resonator. Compared with the traditional dispersive qubit readout strategy, the main advantage of our proposal is that even a weak qubit-resonator coupling is hopeful to lead to a strong measurement by varying the nonlinear feedback control parameter. This work opens up new perspectives for the applications of nonlinear quantum feedback control.

引用

页码：2480 / 2485

页数：6

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