Cooling neutral atoms into maximal entanglement in the Rydberg blockade regime

TL;DR

This paper introduces a novel cooling protocol that uses collective laser pumping and dissipation to reliably prepare maximally entangled states of neutral atoms in the Rydberg blockade regime, without requiring precise individual control.

Contribution

The proposed scheme enables robust entanglement generation through engineered dissipation and collective dynamics, simplifying experimental requirements compared to previous methods.

Findings

Achieves steady-state maximal entanglement of neutral atoms.

Does not require individual atom addressing or precise Rydberg interaction control.

Potentially enhances experimental feasibility in quantum information processing.

Abstract

We propose a cooling scheme to prepare stationary entanglement of neutral atoms in the Rydberg blockade regime by combination of periodically collective laser pumping and dissipation. In each cycle, the controlled unitary dynamics process can selectively pump atoms away from the non-target state while maintaining the target state unchanged. The subsequent dissipative process redistributes the populations of ground states through the engineered spontaneous emission. After a number of cycles, the system will be eventually stabilized into the desired steady state independent of the initial state. This protocol does not rely on coherent addressing of individual neutral atoms or fine control of Rydberg interaction intensity, which can in principle greatly improve the feasibility of experiments in related fields.