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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 11 — Nov. 1, 2012
  • pp: 3141–3149

Nonclassicality and decoherence of photon-subtracted squeezed vacuum states

Xiang-guo Meng, Zhen Wang, Hong-yi Fan, and Ji-suo Wang  »View Author Affiliations


JOSA B, Vol. 29, Issue 11, pp. 3141-3149 (2012)
http://dx.doi.org/10.1364/JOSAB.29.003141


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Abstract

Extending the recent work completed by Biswas and Agarwal [Phys. Rev. A 75, 032104 (2007)] to the case of m-photon-subtracted squeezed vacuum states (m-PSSVSs), we focus our study on nonclassicality and decoherence of the m-PSSVSs. The nonclassical properties are investigated in terms of the squeezing character, the oscillation of photon-number distribution, and the partial negativity of Wigner function (WF).We then study the effect of decoherence on the m-PSSVSs in two different channels, viz., thermal process and phase damping. In each case, the time-evolution of density operators and WFs of such states is derived analytically. After undergoing the thermal channel, the initial pure m-PSSVSs evolve into a mixed state that turns out to be a Laguerre polynomial of combination of creation and annihilation operators within normal ordering; however, they become another mixed state with the exponential decay due to phase damping. At long times, these fields decay to a highly classical thermal field as a result of thermal noise, but they still keep nonclassicality in the phase-damping channel.

© 2012 Optical Society of America

OCIS Codes
(000.5490) General : Probability theory, stochastic processes, and statistics
(270.0270) Quantum optics : Quantum optics
(270.2500) Quantum optics : Fluctuations, relaxations, and noise

ToC Category:
Quantum Optics

History
Original Manuscript: July 11, 2012
Manuscript Accepted: September 20, 2012
Published: October 25, 2012

Citation
Xiang-guo Meng, Zhen Wang, Hong-yi Fan, and Ji-suo Wang, "Nonclassicality and decoherence of photon-subtracted squeezed vacuum states," J. Opt. Soc. Am. B 29, 3141-3149 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-11-3141

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