# Dissipation-based entanglement via quantum Zeno dynamics and Rydberg antiblockade

## TL;DR

This paper introduces a dissipative method leveraging quantum Zeno dynamics and Rydberg antiblockade to generate high-fidelity entanglement between two atoms in cavity QED, with improved speed and robustness.

## Contribution

It presents a new scheme combining quantum Zeno dynamics, Rydberg antiblockade, and feedback control for efficient entanglement generation in cavity QED.

## Key findings

- Achieves about 90% fidelity at cooperativity C=10
- Fidelity improves to 90% at C=5.2 with feedback control
- Convergence rate is enhanced by ground-state blockade mechanism

## Abstract

A novel scheme is proposed for dissipative generation of maximally entanglement between two Rydberg atoms in the context of cavity QED. The spontaneous emission of atoms combined with quantum Zeno dynamics and Rydberg antiblockade guarantees a unique steady solution of the master equation of system, which just corresponds to the antisymmetric Bell state $|S\rangle$. The convergence rate is accelerated by the ground-state blockade mechanism of Rydberg atoms. Meanwhile the effect of cavity decay is suppressed by the Zeno requirement, leading to a steady-state fidelity about $90\%$ as the single-atom cooperativity parameter $C\equiv g^2/(\kappa\gamma)= 10$, and this restriction is further relaxed to $C= 5.2$ once the quantum-jump-based feedback control is exploited.