Tunnel-coupled optical microtraps for ultracold atoms

TL;DR

This paper reviews the development and recent advances of tunnel-coupled optical microtraps for ultracold atoms, highlighting their potential for quantum simulation and the manipulation of quantum states with high geometric flexibility.

Contribution

It provides a comprehensive overview of the design, implementation, and recent progress in tunnel-coupled microtrap systems for ultracold atoms, emphasizing their advantages over traditional optical lattices.

Findings

Enables low-entropy quantum state preparation.

Facilitates exploration of exotic quantum phases.

Offers high geometric flexibility for quantum simulations.

Abstract

Arrays of individual atoms trapped in optical microtraps with micrometer-scale sizes have emerged as a fundamental, versatile, and powerful platform for quantum sciences and technologies. This platform enables the bottom-up engineering of quantum systems, offering the capability of low-entropy preparation of quantum states with flexible geometry, as well as manipulation and detection at the single-site level. The utilization of ultracold itinerant atoms with tunnel coupling in optical microtraps provides new opportunities for quantum simulation, enabling the exploration of exotic quantum states, phases, and dynamics, which would otherwise be challenging to achieve in conventional optical lattices due to high entropy and limited geometric flexibility. Here the development of tunnel-coupled optical microtraps for the manipulation of ultracold atomic quantum systems and its recent advances are briefly reviewed.