Generation of two-mode field squeezing through selective dynamics in cavity QED

TL;DR

This paper proposes a cavity QED scheme to generate two-mode field squeezing using selective Raman excitations, without requiring initial state preparation and demonstrating robustness against atomic decay.

Contribution

It introduces a novel method for two-mode squeezing in cavity QED via selective dynamics with three-level atoms and classical fields, avoiding initial state preparation.

Findings

Two-mode squeezing can be achieved at steady state.

The scheme is robust against atomic spontaneous decay.

No initial state preparation of atoms or cavity modes is needed.

Abstract

We propose a scheme for the generation of a two-mode field squeezed state in cavity QED. It is based on two-channel Raman excitations of a beam of three-level atoms with random arrival times by two classical fields and two high-Q resonator modes. It is shown that by suitably choosing the intensities and detunings of fields the dynamical processes can be selective and two-mode squeezing between the cavity modes can be generated at steady state. This proposal does not need the preparation of the initial states of atoms and cavity modes, and is robust against atomic spontaneous decay.