Laserless quantum gates for electric dipoles in thermal motion

TL;DR

This paper proposes a laserless method for implementing quantum gates between polar molecules in thermal motion using microwave electric field gradients, enabling high-speed quantum processing without laser cooling.

Contribution

It introduces a novel microwave-based approach to perform phonon-mediated quantum gates on polar molecules without laser illumination or ground-state cooling.

Findings

Enables quantum gates with polar molecules in thermal motion.

Combines microwave control with long coherence times.

Operates without laser cooling or ground-state preparation.

Abstract

Internal states of polar molecules can be controlled by microwave-frequency electric dipole transitions. If the applied microwave electric field has a spatial gradient, these transitions also affect the motion of these dipolar particles. This capability can be used to engineer phonon-mediated quantum gates between e.g. trapped polar molecular ion qubits without laser illumination and without the need for cooling near the motional ground state. The result is a high-speed quantum processing toolbox for dipoles in thermal motion that combines the precision microwave control of solid-state qubits with the long coherence times of trapped ion qubits.