Nonclassical properties of multiple-photon subtracted displaced squeezed thermal states

Wang, S.; Hu, Li-Yun; Fan, Heng

doi:10.1140/epjd/e2012-30125-2

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Multiple-photon-subtracted Thermal States1

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“…Their non-classicality was marked by the negativity of both Wigner and P functions surviving to some extent under damping as well. On the contrary, an M-photon-subtracted Gaussian state can be either classical or non-classical, depending on the input state ρG [24,25,26]. For instance, subtraction of photons from a coherent or a thermal state provides a classical non-Gaussian output [24,27].…”

Section: Multiple-photon-subtracted Thermal Statesmentioning

confidence: 99%

Loss of non-Gaussianity for damped photon-subtracted thermal states

Ghiu¹,

Marian²,

Marian³

2014

Phys. Scr.

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Abstract. We investigate non-Gaussianity properties for a set of classical one-mode states obtained by subtracting photons from a thermal state. Three distance-type degrees of non-Gaussianity used for these states are shown to have a monotonic behaviour with respect to their mean photon number. Decaying of their nonGaussianity under damping is found to be consistently described by the distancetype measures considered here. We also compare the dissipative evolution of nonGaussianity when starting from M -photon-subtracted and M -photon-added thermal states.

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