Driving two atoms in an optical cavity into an entangled steady state using engineered decay

TL;DR

This paper introduces engineered decay schemes in cavity QED to reliably produce maximally entangled steady states of two atoms, optimizing parameters for experimental feasibility and high fidelity.

Contribution

It presents novel dissipative protocols leveraging natural decay processes to generate entanglement, with analytical optimization for practical implementation.

Findings

Protocols achieve high fidelity entanglement in realistic cavity conditions

Optimal parameters derived for experimental setups

Fidelity and convergence speed scale favorably with cavity parameters

Abstract

We propose various schemes for the dissipative preparation of a maximally entangled steady state of two atoms in an optical cavity. Harnessing the natural decay processes of cavity photon loss and spontaneous emission, we use an effective operator formalism to identify and engineer effective decay processes, which reach an entangled steady state of two atoms as the unique fixed point of the dissipative time evolution. We investigate various aspects that are crucial for the experimental implementation of our schemes in present-day and future cavity quantum electrodynamics systems and analytically derive the optimal parameters, the error scaling and the speed of convergence of our protocols. Our study shows promising performance of our schemes for existing cavity experiments and favorable scaling of fidelity and speed with respect to the cavity parameters.