Two-colour quantum entanglement in a singly resonant optical parametric oscillator approaching threshold

Domenico Cuozzo, Gian-Luca Oppo

Research output: Contribution to journalArticle

Abstract

Following the analytical work of Ref. [1], a numerical analysis of squeezing and quantum entanglement in a continuous wave singly-resonant optical parametric oscillator approaching threshold is provided. The singly resonant case is mainly relevant to largely non-degenerate signal and idler modes (two-colour output). As the threshold of oscillation is approached the numerical spectra of the intensity difference confirm squeezing of quantum fluctuations and a progressive line-narrowing in the linear case. In the nonlinear case entanglement is confirmed although progressively reduced when approaching threshold with the squeezing spectra still displaying a narrowing of the spectral line. Modification of quantum entanglement approaching threshold is also evaluated via the condition of state inseparability.
LanguageEnglish
JournalEuropean Physical Journal D: Atomic, Molecular, Optical and Plasma Physics
Publication statusUnpublished - 2012

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parametric amplifiers
compressing
color
thresholds
numerical analysis
continuous radiation
line spectra
oscillations
output

Keywords

  • optical parametric oscillator
  • optics
  • quantum entanglement

Cite this

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title = "Two-colour quantum entanglement in a singly resonant optical parametric oscillator approaching threshold",
abstract = "Following the analytical work of Ref. [1], a numerical analysis of squeezing and quantum entanglement in a continuous wave singly-resonant optical parametric oscillator approaching threshold is provided. The singly resonant case is mainly relevant to largely non-degenerate signal and idler modes (two-colour output). As the threshold of oscillation is approached the numerical spectra of the intensity difference confirm squeezing of quantum fluctuations and a progressive line-narrowing in the linear case. In the nonlinear case entanglement is confirmed although progressively reduced when approaching threshold with the squeezing spectra still displaying a narrowing of the spectral line. Modification of quantum entanglement approaching threshold is also evaluated via the condition of state inseparability.",
keywords = "optical parametric oscillator , optics, quantum entanglement",
author = "Domenico Cuozzo and Gian-Luca Oppo",
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journal = "European Physical Journal D: Atomic, Molecular, Optical and Plasma Physics",
issn = "1434-6060",

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T1 - Two-colour quantum entanglement in a singly resonant optical parametric oscillator approaching threshold

AU - Cuozzo, Domenico

AU - Oppo, Gian-Luca

PY - 2012

Y1 - 2012

N2 - Following the analytical work of Ref. [1], a numerical analysis of squeezing and quantum entanglement in a continuous wave singly-resonant optical parametric oscillator approaching threshold is provided. The singly resonant case is mainly relevant to largely non-degenerate signal and idler modes (two-colour output). As the threshold of oscillation is approached the numerical spectra of the intensity difference confirm squeezing of quantum fluctuations and a progressive line-narrowing in the linear case. In the nonlinear case entanglement is confirmed although progressively reduced when approaching threshold with the squeezing spectra still displaying a narrowing of the spectral line. Modification of quantum entanglement approaching threshold is also evaluated via the condition of state inseparability.

AB - Following the analytical work of Ref. [1], a numerical analysis of squeezing and quantum entanglement in a continuous wave singly-resonant optical parametric oscillator approaching threshold is provided. The singly resonant case is mainly relevant to largely non-degenerate signal and idler modes (two-colour output). As the threshold of oscillation is approached the numerical spectra of the intensity difference confirm squeezing of quantum fluctuations and a progressive line-narrowing in the linear case. In the nonlinear case entanglement is confirmed although progressively reduced when approaching threshold with the squeezing spectra still displaying a narrowing of the spectral line. Modification of quantum entanglement approaching threshold is also evaluated via the condition of state inseparability.

KW - optical parametric oscillator

KW - optics

KW - quantum entanglement

UR - http://pra.aps.org/abstract/PRA/v84/i4/e043810

M3 - Article

JO - European Physical Journal D: Atomic, Molecular, Optical and Plasma Physics

T2 - European Physical Journal D: Atomic, Molecular, Optical and Plasma Physics

JF - European Physical Journal D: Atomic, Molecular, Optical and Plasma Physics

SN - 1434-6060

ER -