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Non-Gaussianity of photon-added-then-subtracted squeezed vacuum state

Authors
Journal
Optik - International Journal for Light and Electron Optics
0030-4026
Publisher
Elsevier
Publication Date
Volume
123
Issue
1
Identifiers
DOI: 10.1016/j.ijleo.2010.10.050
Keywords
  • Non-Gaussianity
  • Photon-Added-Then-Subtracted
  • Squeezed Vacuum State
  • Wigner Function
Disciplines
  • Physics

Abstract

Abstract In this paper, the photon-added-then-subtracted squeezed vacuum state (PASSVS), a non-Gaussian state, is presented by adding then subtracting photon to a squeezed vacuum state. It is found that PASSVS is just a superposition state between S( r) | 0〉 and S( r) | 2〉, where S( r) is the single-mode squeezing operator with the squeezing parameter r. Its non-Gaussianity is exhibited via its Wigner function and the Hilbert–Schmidt distance. In addition, a possible scheme is presented to produce the PASSVS by virtue of the cavity QED.

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