Driving three atoms into a singlet state in an optical cavity via adiabatic passage of a dark state

TL;DR

This paper presents a robust adiabatic passage scheme to entangle three atoms into a singlet state within an optical cavity, effectively suppressing dissipation effects like spontaneous emission and cavity decay.

Contribution

It introduces a novel, robust adiabatic protocol for preparing three-atom singlet states that is resilient to experimental imperfections and dissipation.

Findings

The scheme achieves high fidelity in state preparation.

It is immune to atomic spontaneous emission.

Cavity decay effects can be effectively suppressed.

Abstract

In this paper, we propose an efficient scheme to drive three atoms in an optical cavity into a singlet state via adiabatic passage. Appropriate Rabi frequencies of the classical fields are selected to realize the present scheme. The scheme is robust against deviations in the pulse delay and laser intensity through some simple analysis of the adiabatic condition. It is notable that the estimated range of the effective adiabaticity condition coincides with the numerical results. When taking dissipation into account, we show that the process is immune to atomic spontaneous emission as the atomic excited states are never populated in adiabatic evolution. Moreover, under certain conditions, the cavity decay can also be efficiently suppressed.