Control of Dipolar Dynamics by Geometrical Programming

TL;DR

This paper introduces geometric programming techniques for controlling dipolar quantum many-body systems using molecular tweezer arrays, enabling dynamic rearrangement, decoherence suppression, and enhanced spin squeezing.

Contribution

It presents novel methods for quantum control through geometric reshaping of molecular arrays, including dynamic rearrangement and static geometry optimization.

Findings

Suppression of motional dephasing

Achieving enhanced spin squeezing

Identification of a geometry that reduces decoherence

Abstract

We propose and theoretically analyze methods for quantum many-body control through geometric reshaping of molecular tweezer arrays. Dynamic rearrangement during entanglement is readily available due to the extended coherence times of molecular rotational qubits. We show how motional dephasing can be suppressed and enhanced spin squeezing can be achieved in an actively rearranged short-range XY model. We also analyze in detail a specific static geometry that significantly suppresses decoherence. These general methods as applied to programmable quantum systems offer robust control modalities that are well suited to molecules.