Enhancement of field squeezing using coherent feedback

Journal Article · Thu Oct 15 00:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.80.042107· OSTI ID:21316346

Gough, J E; Wildfeuer, S ^[1]

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1. Institute for Mathematics and Physics, Aberystwyth University, Wales SY23 3BZ (United Kingdom)

The theory of quantum feedback networks has recently been developed with the aim of showing how quantum input-output components may be connected together so as to control, stabilize, or enhance the performance of one of the subcomponents. In this paper, we show how the degree to which an idealized component (a degenerate parametric amplifier in the strong-coupling regime) can squeeze input fields may be enhanced by placing the component in loop in a simple feedback mechanism involving a beam splitter. We study the spectral properties of output fields, placing particular emphasis on the elastic and inelastic components of the power density.

• OSTI ID: 21316346
• Journal Information: Physical Review. A, Vol. 80, Issue 4; Other Information: DOI: 10.1103/PhysRevA.80.042107; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM SPLITTING
BEAMS
CONTROL
FEEDBACK
OPTICS
PARAMETRIC AMPLIFIERS
PERFORMANCE
POWER DENSITY
STRONG-COUPLING MODEL