Holographic method for site-resolved detection of a 2D array of ultracold atoms

TL;DR

This paper introduces a holographic detection technique for ultracold atoms in a 2D optical lattice, enabling site-resolved imaging with minimal photon scattering and potentially reducing cooling requirements.

Contribution

The authors develop a holographic method that uses interference patterns to achieve high-fidelity, site-resolved detection of ultracold atoms with fewer scattered photons than traditional methods.

Findings

High reconstruction fidelity with only a few hundred scattered photons per atom

Potential to eliminate additional cooling during detection for light atomic elements

Method applicable to various atomic species, including lithium

Abstract

We propose a novel approach to site-resolved detection of a 2D gas of ultracold atoms in an optical lattice. A near resonant laser beam is coherently scattered by the atomic array and its interference pattern is holographically recorded by superimposing it with a reference laser beam on a CCD chip. Fourier transformation of the recorded intensity pattern reconstructs the atomic distribution in the lattice with single-site resolution. The holographic detection method requires only a few hundred scattered photons per atom in order to achieve a high reconstruction fidelity. Therefore, additional cooling during detection might not be necessary even for light atomic elements such as lithium.