Linear atomic quantum coupler

TL;DR

This paper introduces a linear atomic quantum coupler with two waveguides containing atoms, capable of generating nonclassical effects and exhibiting phenomena like revival-collapse in atomic inversions, extending the Jaynes-Cummings model.

Contribution

The paper develops a new atomic quantum coupler model that integrates atom-waveguide interactions and demonstrates nonclassical effects not seen in traditional couplers.

Findings

Atomic inversions show long revival-collapse phenomena.

The system can produce nonclassical effects.

Under certain conditions, it replicates two-mode Jaynes-Cummings model results.

Abstract

In this paper, we develop the notion of the linear atomic quantum coupler. This device consists of two modes propagating into two waveguides, each of them includes a localized and/or a trapped atom. These waveguides are placed close enough to allow exchanging energy between them via evanescent waves. Each mode interacts with the atom in the same waveguide in the standard way, i.e. as the Jaynes-Cummings model (JCM), and with the atom-mode in the second waveguide via evanescent wave. We present the Hamiltonian for the system and deduce the exact form for the wavefunction. We investigate the atomic inversions and the second-order correlation function. In contrast to the conventional linear coupler, the atomic quantum coupler is able to generate nonclassical effects. The atomic inversions can exhibit long revival-collapse phenomenon as well as subsidiary revivals based on the competition among the switching mechanisms in the system. Finally, under certain conditions, the system can yield the results of the two-mode JCM.