Robust creation of atomic W state in a cavity by adiabatic passage

TL;DR

This paper presents two robust methods for creating atomic W-states in a cavity using adiabatic passage, effectively suppressing losses and enabling controlled entanglement of three atoms outside the cavity.

Contribution

It introduces novel adiabatic passage schemes for deterministic atomic W-state generation with enhanced robustness against losses.

Findings

Successful suppression of atomic spontaneous emissions and cavity decay.

Deterministic creation of controllable three-atom W-states.

Atoms become entangled outside the cavity after passing through the cavity-mode and laser beam.

Abstract

We propose two robust schemes to generate controllable (deterministic) atomic W-states of three three-level atoms interacting with an optical cavity and a laser beam. Losses due to atomic spontaneous emissions and to cavity decay are efficiently suppressed by employing adiabatic passage technique and appropriately designed atom-field couplings. In these schemes the three atoms traverse the cavity-mode and the laser beam and become entangled in the free space outside the cavity.