科研之友
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摘要
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)vertical bar 0) and S(r)vertical bar 2), where S(r) is the single-mode squeezing operator with the squeezing parameter r. Is 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.
