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

被引：19
作者：
Ghiu, Iulia [1 ]
Marian, Paulina [1 ,2 ]
Marian, Tudor A. [1 ]
机构：
[1] Univ Bucharest, Dept Phys, Ctr Adv Quantum Phys, R-077125 Bucharest, Romania
[2] Univ Bucharest, Dept Phys Chem, R-030018 Bucharest, Romania
来源：
PHYSICA SCRIPTA | 2014年 / T160卷
关键词：
classicality; photon-number distribution; non-Gaussianity; damping; photon-subtracted thermal states; NONCLASSICAL PROPERTIES; EXCITATIONS;
D O I：
10.1088/0031-8949/2014/T160/014014
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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 monotonic behaviour with respect to their mean photon number. Decaying of their non-Gaussianity under damping is found to be consistently described by the distance-type measures considered here. We also compare the dissipative evolution of non-Gaussianity when starting from M-photon-subtracted and M-photon-added thermal states.
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页数：5
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