Quantifying the decay of quantum properties in single-mode states

Details Quantifying the decay of quantum properties in single-mode states Quantifying the decay of quantum properties in single-mode states

2007-10-31

arxiv.org/abs/0710.5930v3

Optics Communications 281 (2008) 4696

Physics

Quantum Physics

Accepted version

Scientific paper

10.1016/j.optcom.2008.06.017

The dissipative dynamics of Gaussian squeezed states (GSS) and coherent superposition states (CSS) are analytically obtained and compared. Time scales for sustaining different quantum properties such as squeezing, negativity of the Wigner function or photon number distribution are calculated. Some of these characteristic times also depend on initial conditions. For example, in the particular case of squeezing, we find that while the squeezing of CSS is only visible for small enough values of the field intensity, in GSS it is independent of this quantity, which may be experimentally advantageous. The asymptotic dynamics however is quite similar as revealed by the time evolution of the fidelity between states of the two classes.

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