Continuous-variable entanglement in a nondegenerate three-level laser with a parametric oscillator

Journal Article · Wed Aug 15 04:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.023808· OSTI ID:21016033

Alebachew, Eyob ^[1]

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1. Department of Physics, Addis Ababa University, P. O. Box 33085, Addis Ababa (Ethiopia) and Departimento di Scienze Fisiche, Universita di Napoli 'Federico II', Complesso Monte S. Angelo, Via Cintia, 80126 Naples (Italy)

We consider a nondegenerate three-level cascade laser with a subthreshold nondegenerate parametric oscillator coupled to a vacuum reservoir. Applying the pertinent master equation, we analyze the squeezing and entanglement properties of the two-mode light produced by this quantum optical system inside and outside the cavity. We also determine the normalized second-order correlation function for the two-mode light as well as for individual mode. We find that the light generated by this system is in a two-mode squeezed state and the state of the system is strongly entangled at steady state. Moreover, the presence of the parametric oscillator leads to an increase in the degree of squeezing and entanglement. We also find that the intermode correlation decreases as the injected atomic coherence decreases in the system.

• OSTI ID: 21016033
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CORRELATION FUNCTIONS
EXCITED STATES
LASERS
OPTICAL SYSTEMS
PARAMETRIC AMPLIFIERS
PARAMETRIC OSCILLATORS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
STEADY-STATE CONDITIONS