Experimental demonstration of single-site addressability in a two-dimensional optical lattice

TL;DR

This paper demonstrates precise control over individual sites in a 2D optical lattice using a focused electron beam, enabling the creation of stable, arbitrary atomic patterns for quantum technologies.

Contribution

It introduces a method for single-site addressability in a 2D optical lattice with high stability, advancing quantum simulation and information processing capabilities.

Findings

Successful site-specific atom removal with electron beam

Creation of arbitrary, stable atomic patterns

Potential applications in quantum simulation and quantum information

Abstract

We demonstrate single site addressability in a two-dimensional optical lattice with 600 nm lattice spacing. After loading a Bose-Einstein condensate in the lattice potential we use a focused electron beam to remove atoms from selected sites. The patterned structure is subsequently imaged by means of scanning electron microscopy. This technique allows us to create arbitrary patterns of mesoscopic atomic ensembles. We find that the patterns are remarkably stable against tunneling diffusion. Such micro-engineered quantum gases are a versatile resource for applications in quantum simulation, quantum optics and quantum information processing with neutral atoms.