Time-dependent interaction between a two-level atom and a su(1,1) Lie algebra quantum system

Abstract

The problem of the interaction between a two-level atom and a two-mode field in the parametric amplifier-type is considered. A similar problem appears in an ion trapped in a two-dimensional trap. The problem is transformed into an interaction governed by su(1, 1) Lie algebraic operators with phase and coupling parameter depending on time.Under an integrability condition, that relates phase and coupling, a solution to the wavefunction is obtained using the Schrödinger equation. The effects of the functional dependence of the coupling and the initial state of the two-level atom on atomic inversion, the degree of entanglement, the fidelity and the Glauber second-order correlation function are investigated. It is shown that the acceleration term plays an important role in controlling the function behavior of the considered quantities.

Effect of intensity-dependent couplings and the atomic dissipation on the interaction of two three-level atoms and two modes of radiation field

“…The process of measuring the entanglement between parts of a quantum system is of paramount importance in quantum information. Therefore, we consider the fidelity [2]- [37] to measure the amount of entanglement between the particle and the cavity field.…”

Tavis–Cummings Model with Moving Atoms

“…Suppose that the coupling function takes the follows form, where and are arbitrary functions that we will define later [ 71 ]. Suppose we introduce the scaled time operators, …”