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Title: Two-color continuous-variable quantum entanglement in a singly resonant optical parametric oscillator

Abstract

We apply the input-output theory of optical cavities to formulate a quantum treatment of a continuous-wave singly resonant optical parametric oscillator. This case is mainly relevant to highly nondegenerate signal and idler modes. We show that both intensity and quadrature squeezing are present and that the maximum noise reduction below the standard quantum limit is the same at the signal and idler frequencies as in the doubly resonant case. As the threshold of oscillation is approached, however, the intensity-difference and quadrature spectra display a progressive line narrowing which is absent in the balanced doubly resonant case. By use of the separability criterion for continuous variables, the signal-idler state is found to be entangled over wide ranges of the parameters. We show that attainable levels of squeezing and entanglement make singly resonant configurations ideal candidates for two-color quantum information processes, because of their ease of tuning in experimental realizations.

Authors:
;  [1]
  1. ICS, SUPA, and Department of Physics, University of Strathclyde, Glasgow G4 ONG, Scotland (United Kingdom)
Publication Date:
OSTI Identifier:
22093366
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 4; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COLOR; LINE NARROWING; NOISE; OSCILLATIONS; PARAMETRIC OSCILLATORS; QUADRATURES; QUANTUM ENTANGLEMENT; QUANTUM INFORMATION; QUANTUM MECHANICS

Citation Formats

Cuozzo, Domenico, and Oppo, Gian-Luca. Two-color continuous-variable quantum entanglement in a singly resonant optical parametric oscillator. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.043810.
Cuozzo, Domenico, & Oppo, Gian-Luca. Two-color continuous-variable quantum entanglement in a singly resonant optical parametric oscillator. United States. https://doi.org/10.1103/PHYSREVA.84.043810
Cuozzo, Domenico, and Oppo, Gian-Luca. 2011. "Two-color continuous-variable quantum entanglement in a singly resonant optical parametric oscillator". United States. https://doi.org/10.1103/PHYSREVA.84.043810.
@article{osti_22093366,
title = {Two-color continuous-variable quantum entanglement in a singly resonant optical parametric oscillator},
author = {Cuozzo, Domenico and Oppo, Gian-Luca},
abstractNote = {We apply the input-output theory of optical cavities to formulate a quantum treatment of a continuous-wave singly resonant optical parametric oscillator. This case is mainly relevant to highly nondegenerate signal and idler modes. We show that both intensity and quadrature squeezing are present and that the maximum noise reduction below the standard quantum limit is the same at the signal and idler frequencies as in the doubly resonant case. As the threshold of oscillation is approached, however, the intensity-difference and quadrature spectra display a progressive line narrowing which is absent in the balanced doubly resonant case. By use of the separability criterion for continuous variables, the signal-idler state is found to be entangled over wide ranges of the parameters. We show that attainable levels of squeezing and entanglement make singly resonant configurations ideal candidates for two-color quantum information processes, because of their ease of tuning in experimental realizations.},
doi = {10.1103/PHYSREVA.84.043810},
url = {https://www.osti.gov/biblio/22093366}, journal = {Physical Review. A},
issn = {1050-2947},
number = 4,
volume = 84,
place = {United States},
year = {Sat Oct 15 00:00:00 EDT 2011},
month = {Sat Oct 15 00:00:00 EDT 2011}
}