# Nondestructive cooling of an atomic quantum register via state-insensitive Rydberg interactions

## TL;DR

This paper introduces a nondestructive cooling protocol for neutral atom quantum registers using state-insensitive Rydberg interactions, enabling heat transfer without damaging quantum information, thus extending quantum memory lifetime.

## Contribution

It presents a novel cooling method that preserves quantum states by leveraging Rydberg interactions, and also enables tunable interactions for quantum simulation.

## Key findings

- Effective phonon coupling facilitates heat transfer from data to auxiliary atoms.
- The protocol extends quantum storage lifetime.
- It can be adapted for quantum spin-model simulation.

## Abstract

We propose a protocol for sympathetically cooling neutral atoms without destroying the quantum information stored in their internal states. This is achieved by designing state-insensitive Rydberg interactions between the data-carrying atoms and cold auxiliary atoms. The resulting interactions give rise to an effective phonon coupling, which leads to the transfer of heat from the data atoms to the auxiliary atoms, where the latter can be cooled by conventional methods. This can be used to extend the lifetime of quantum storage based on neutral atoms and can have applications for long quantum computations. The protocol can also be modified to realize state-insensitive interactions between the data and the auxiliary atoms but tunable and non-trivial interactions among the data atoms, allowing one to simultaneously cool and simulate a quantum spin-model.