Feedback Intensity Equalization Algorithm for Multi-Spots Holographic Tweezer

TL;DR

This paper introduces an algorithm to equalize the intensity of traps in large-scale holographic tweezer arrays, improving uniformity for quantum applications.

Contribution

The paper presents a novel intensity equalization algorithm that achieves below 1.1% non-uniformity in large tweezer arrays, enhancing quantum simulation capabilities.

Findings

Non-uniformity below 1.1% for arrays larger than 1000 traps

Optimization of hardware can further improve uniformity

Enables large-scale quantum computation and simulation

Abstract

High degree of adjustability enables the holographic tweezer array a versatile platform for creating an arbitrary geometrical atomic array. In holographic tweezer array experiments, an optical tweezer generated by a spatial light modulator (SLM) usually is used as a static tweezer array. However, the alternating current (AC) stark effect generally induces the intensity difference of traps in terms of different light shifts. So, intensity equalization is an essential prerequisite for preparing a many-body system with individually controlled atoms. Here, we report an intensity equalization algorithm. In particular, we observe the non-uniformity of the tweezer array is below 1.1% when the array size is larger than 1000. Our analysis shows that by optimizing the hardware performance of the optical system, this uniformity could be further improved. Our work offers the opportunities for large-scale quantum computation and simulation with reconfigurable atom arrays.