Photon-added squeezed thermal states: Statistical properties and its decoherence in a photon-loss channel

Abstract

Using the normally ordered Gaussian form of displaced-squeezed thermal field characteristic of average photon numbern, we introduce the photon-added squeezed thermo state (PASTS) and investigate its statistical properties, such as Mandel's Q-parameter, number distribution (as a Legendre polynomial), the Wigner function. We then study its decoherence in a photon-loss channel in term of the negativity of WF by deriving the analytical expression of WF for PASTS. It is found that the WF with single photon-added is always partial negative for the arbitrary values ofn and the squeezing parameter r.

Squeezing-enhanced communication without a phase reference

“…( 11) simply putting Q (r, α) (n) as total photon-number distribution. Their photon number distribution can be computed as follows [59]. Redefining x and p with a rotation in the phase space, V can be put to diagonal form.…”

Synthesis of Hermite polynomial excited squeezed vacuum states from two separate single-mode squeezed vacuum states

“…7 we plot the squeezing effect as a function of different parameters by considering Eqs. (14), (15) and (13). Here we adopt quantum squeezing quantified in a dB scale through X X X dB 1 0l o g / , It is clearly seen from Fig.…”

“…Agarwal and Tara investigated the nonclassicality of field states when photon addition operation is applied to the coherent state [12]. Our group investigated the nonclassical properties of optical fields generated by operating photon-addition on and subtraction from squeezed thermal states [13,14] . Recently, Lee and Nha proposed a coherent superposition of photon addition and subtraction, ta ra + † ( t r 1 2 2 | | + | | = ) acting on a coherent state and a thermal state [15].…”

Generating Hermite polynomial excited squeezed states by means of conditional measurements on a beam splitter

“…Quantum state engineering has been a subject of increasing interest to construct various novel nonclassical states in quantum optics and quantum information processing [1,2]. From a theoretical point of view, the simplest way of generating nonclassical field states is to apply the photon creation operation to classical states such as the thermal and coherent states [3][4][5]. These nonclassical states, such as the single-photon added coherent state [6] and single-photon-added thermal state [7], have been realized experimentally.…”