Parity detection in quantum optical metrology without number-resolving detectors

Plick, William N. ; Anisimov, Petr M. ; Dowling, Jonathan P. ; Lee, Hwang ; Agarwal, Girish S. (2010) Parity detection in quantum optical metrology without number-resolving detectors New Journal of Physics, 12 . 113025_1-113025_12. ISSN 1367-2630

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Official URL: http://iopscience.iop.org/1367-2630/12/11/113025

Related URL: http://dx.doi.org/10.1088/1367-2630/12/11/113025

Abstract

We present a method for directly obtaining the parity of a Gaussian state of light without recourse to photon-number counting. The scheme uses only a simple balanced homodyne technique and intensity correlation. Thus interferometric schemes utilizing coherent or squeezed light and parity detection may be practically implemented for an arbitrary photon flux. Specifically, we investigate a two-mode, squeezed light, Mach-Zehnder interferometer and show how the parity of the output state may be obtained. We also show that the detection may be described independently of the parity operator and that this 'parity-by-proxy' measurement has the same signal as traditional parity.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics.
ID Code:90349
Deposited On:09 May 2012 09:27
Last Modified:09 May 2012 09:27

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