Time-domain squeezing and quantum distributions in the pulsed regime

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.77.023820· OSTI ID:21140567

Adamyan, N H ^[1]; Adamyan, H H ^[2]; Kryuchkyan, G Yu ^[1]

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1. Yerevan State University, 1 A Manoogian, 375049 Yerevan (Armenia)
2. Institute for Physical Research, National Academy of Sciences, Ashtarak-2, 378410 (Armenia)

We investigate time-dependent properties of Einstein-Podolsky-Rosen (EPR) light beams generated in a nondegenerate optical parametric oscillator (NOPO) driven by a sequence of laser pulses with Gaussian time-dependent envelopes. This investigation continues our previous analysis [H. H. Adamyan and G. Yu. Kryuchkyan, Phys. Rev. A 74, 023810 (2006)] and involves problems of two-mode quadrature squeezing as well as intensity-difference squeezing in the time domain. The peculiarities of EPR beams are also discussed in the framework of phase-space quantum distributions. Two kinds of non-Gaussian Wigner functions, for the reduced one-mode state of periodically pulsed NOPO and for EPR beams which are combined on a one-half beam splitter are calculated numerically. We also investigate the Wigner functions of intensity-correlated twin beams following the conditional photon state-preparation scheme. It is demonstrated that the Wigner functions involve negative values in parts of the phase space for the schemes with one, two, and three photons.

• OSTI ID: 21140567
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 77; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM SPLITTING
DISTRIBUTION
GAUSS FUNCTION
LASER RADIATION
PARAMETRIC OSCILLATORS
PERIODICITY
PHASE SPACE
PHOTON BEAMS
PULSES
QUADRATURES
TIME DEPENDENCE
VISIBLE RADIATION
WIGNER DISTRIBUTION