A new class of $f$-deformed charge coherent states and their nonclassical properties

TL;DR

This paper introduces a new class of $f$-deformed charge coherent states using nonlinear coherent state methods, revealing their nonclassical properties and potential for diverse quantum applications.

Contribution

It generalizes two-mode charge coherent states through $f$-deformation, enabling the generation of states with various nonclassical features and physical properties.

Findings

States exhibit quadrature squeezing and sub-Poissonian statistics.

Photon count oscillations and nonclassical quasi-probability distributions are observed.

Enhanced nonclassicality compared to linear charge coherent states.

Abstract

Two-mode charge (pair) coherent states has been introduced previously by using $<\eta|$ representation. In the present paper we reobtain these states by a rather different method. Then, using the nonlinear coherent states approach and based on a simple manner by which the representation of two-mode charge coherent states is introduced, we generalize the bosonic creation and annihilation operators to the $f$-deformed ladder operators and construct a new class of $f$-deformed charge coherent states. Unlike the (linear) pair coherent states, our presented structure has the potentiality to generate a large class of pair coherent states with various nonclassicality signs and physical properties which are of interest. Along this purpose, we use a few well-known nonlinearity functions associated with particular quantum systems as some physical appearances of our presented formalism. After introducing the explicit form of the above correlated states in two-mode Fock-space, several nonclassicality features of the corresponding states (as well as the two-mode linear charge coherent states) are numerically investigated by calculating quadrature squeezing, Mandel parameter, second-order correlation function, second-order correlation function between the two modes and Cauchy-Schwartz inequality. Also, the oscillatory behaviour of the photon count and the quasi-probability (Husimi) function of the associated states will be discussed.