Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5190
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Title: Quantum feedback networks and control : a brief survey
Authors: Zhang, G 
James, MR
Issue Date: Jun-2012
Source: Chinese science bulletin (科學通報. 英文版), June 2012, v. 57, no. 18, p. 2200-2214
Abstract: The purpose of this paper is to provide a brief review of some recent developments in quantum feedback networks and control. A quantum feedback network (QFN) is an interconnected system consisting of open quantum systems linked by free fields and/or direct physical couplings. Basic network constructs, including series connections as well as feedback loops, are discussed. The quantum feedback network theory provides a natural framework for analysis and design. Basic properties such as dissipation, stability, passivity and gain of open quantum systems are discussed. Control system design is also discussed, primarily in the context of open linear quantum stochastic systems. The issue of physical realizability is discussed, and explicit criteria for stability, positive real lemma, and bounded real lemma are presented. Finally for linear quantum systems, coherent H∞ and LQG control are described.
Keywords: Open quantum systems
Quantum feedback networks
Physical realizability
H∞ control
LQG control
Publisher: Chinese Academy of Sciences
Journal: Chinese science bulletin (科學通報. 英文版) 
ISSN: 1001-6538
EISSN: 1861-9541
DOI: 10.1007/s11434-012-5199-7
Rights: ©The Author(s) 2012. This article is published with open access at Springerlink.com
Appears in Collections:Journal/Magazine Article

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