Quantum feedback networks and control: A brief survey

Date

2012

Authors

Zhang, Guofeng
James, Matthew

Journal Title

Journal ISSN

Volume Title

Publisher

Science Press in China

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.

Description

Keywords

Keywords: H 8 control; LQG control; open quantum systems; physical realizability; quantum feedback networks

Citation

Source

Chinese Science Bulletin

Type

Journal article

Book Title

Entity type

Access Statement

Open Access

License Rights

DOI

10.1007/s11434-012-5199-7

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