Interaction of Two-Level Atom with Squeezed Vacuum Reservoir

Abstract

In this paper, the quantum properties of a two-level atom interaction with squeezed vacuum reservoir is throughly analyzed. With the aid of the interaction Hamiltonian and the master equation, we obtain the time evolution of the expectation values of the atomic operators. Employing the steady-state solution of these equations, we calculate the power spectrum and the second-order correlation function for the interaction of two-level atom with squeezed vacuum reservoir. It is found that the half width of the power spectrum of the light increases with the squeeze parameter, r . Furthermore, in the absence of decay constant and interaction time, it enhances the probability for the atom to be in the upper level.

Quantum Jaynes–Cummings model for a two-level system with effects of parametric time-dependences

“…The interactions between a two-level atom and a quantized single-mode electromagnetic field have attracted much attention in the physics community up until now, thanks to their potential applicability in the state-of-the-art science [1][2][3][4][5][6]. The experiments of such interactions reveal many novel quantum effects, such as the quantum collapses and revivals of atomic inversion [7,8], photon antibunching [9], squeezing of the radiation field [3,10], inversionless light amplification [11], and inducing a controllable transparency [12,13].…”

“…The interactions between a two-level atom and a quantized single-mode electromagnetic field have attracted much attention in the physics community up until now, thanks to their potential applicability in the state-of-the-art science [1][2][3][4][5][6]. The experiments of such interactions reveal many novel quantum effects, such as the quantum collapses and revivals of atomic inversion [7,8], photon antibunching [9], squeezing of the radiation field [3,10], inversionless light amplification [11], and inducing a controllable transparency [12,13]. Twolevel atoms are not only used for providing the simplest model for light-matter interactions, but are a kind of potential resources for qubits in quantum information processing, which are indispensable in quantum computation, quantum communication, quantum teleportation, etc.…”