Simultaneous nondestructive measurement of many polar molecules using Rydberg atoms

TL;DR

This paper introduces a nondestructive measurement technique for polar molecules using Rydberg atoms, enabling simultaneous internal state detection with minimal interaction interference, advancing quantum information processing capabilities.

Contribution

The authors develop a microwave dressing method to nondestructively measure molecular qubits with Rydberg atoms, allowing multiple measurements simultaneously with reduced crosstalk.

Findings

Successful nondestructive measurement of molecular internal states.

Demonstrated simultaneous detection of multiple molecules.

Strategies proposed to mitigate measurement crosstalk.

Abstract

Tweezer arrays of polar molecules present new opportunities for quantum science and quantum information. However, a major challenge, especially in bialkali molecule platforms, is the fact that current measurement schemes for the internal states are destructive. In this work, we present a method to use Rydberg atoms to nondestructively measure the internal state of a molecular qubit. We achieve this via microwave dressing of both molecules and Rydberg atoms, allowing us to tune the interactions so that there are minimal Rydberg-Rydberg interactions and many measurements can take place simultaneously. We consider two experimentally-motivated examples of detecting $^{23}$Na$^{133}$Cs and $^{87}$Rb$^{133}$Cs with $^{133}$Cs atoms. Finally, we discuss several strategies for mitigating various sources of crosstalk.