Quantum noise locking

Date

2005

Authors

McKenzie, Kirk
Mikhailov, Eugeniy
Goda, Keisuke
Lam, Ping Koy
Grosse, Nicolai
Gray, Malcolm
Mavalvala, Nergis
McClelland, David

Journal Title

Journal ISSN

Volume Title

Publisher

Institute of Physics Publishing

Abstract

Quantum optical states which have no coherent amplitude, such as squeezed vacuum states, cannot rely on standard readout techniques to generate error signals for control of the quadrature phase. Here we investigate the use of asymmetry in the quadrature variances to obtain a phase-sensitive readout and to lock the phase of a squeezed vacuum state, a technique which we call noise locking (NL). We carry out a theoretical derivation of the NL error signal and the associated stability of the squeezed and anti-squeezed lock points. Experimental data for the NL technique both in the presence and absence of coherent fields are shown, including a comparison with coherent locking techniques. Finally, we use NL to enable a stable readout of the squeezed vacuum state on a homodyne detector.

Description

Keywords

Keywords: Error analysis; Noise abatement; Signal processing; Stability; Noise locking; Non-classical lights; Quantum noise; Readout techniques and control; Quantum optics Non-classical light; Quantum noise; Readout techniques and control

Citation

Source

Journal of Optics B: Quantum and Semiclassical Optics

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1088/1464-4266/7/10/032

Restricted until

2037-12-31