Multipartite entangled states with two bosonic modes and qubits

TL;DR

This paper explores how phase control in atom-cavity systems enables the deterministic creation of various multipartite entangled states, analyzing their robustness under realistic imperfections like dissipation and timing errors.

Contribution

It introduces a phase-dependent method for generating and controlling multipartite entangled states in atom-cavity systems, including hybrid states, with analysis of fidelity and nonlocality under imperfections.

Findings

Deterministic generation of Bell, W, GHZ, and cluster states.

Inhibition of dipole-dipole interactions via phase tuning.

Violation of local realism persists despite dissipation and timing errors.

Abstract

We theoretically investigate the role of different phases of coupling constants in the dynamics of atoms and two cavity modes, observing deterministic generation of prototype or hybrid Bell, W, GHZ, and cluster states. Commonly induced dipole-dipole interactions (far-off resonance) are inhibited between particular pairs of qubits under suitable choice of those phases. We evaluate the generation fidelities when imperfections such as dissipative environments and time precision errors are considered. We show violation of local realism for the generated cluster state under such imperfections, even when approaching the weak coupling regime.