Nonclassicality and decoherence of photon-subtracted squeezed states

Biswas, Asoka ; Agarwal, G. S. (2007) Nonclassicality and decoherence of photon-subtracted squeezed states Physical Review A, 75 (3). 032104_1-032104_8. ISSN 1050-2947

PDF - Publisher Version

Official URL:

Related URL:


We discuss nonclassical properties of single-photon subtracted squeezed vacuum states in terms of the sub-Poissonian statistics and the negativity of the Wigner function. We derive a compact expression for the Wigner function from which we find the region of phase space where Wigner function is negative. We find an upper bound on the squeezing parameter for the state to exhibit sub-Poissonian statistics. We then study the effect of decoherence on the single-photon subtracted squeezed states. We present results for two different models of decoherence, viz. amplitude decay model and the phase diffusion model. In each case we give analytical results for the time evolution of the state. We discuss the loss of nonclassicality as a result of decoherence. We show through the study of their phase-space properties how these states decay to vacuum due to the decay of photons. We show that phase damping leads to very slow decoherence, slower than the photon-number decay.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:11764
Deposited On:13 Nov 2010 13:56
Last Modified:16 May 2016 21:11

Repository Staff Only: item control page