Coherent addressing of individual neutral atoms in a 3D optical lattice

TL;DR

This paper demonstrates precise, coherent control of individual neutral atoms in a 3D optical lattice using reconfigurable laser beams, achieving high fidelity with minimal disturbance to neighboring atoms, advancing quantum computing scalability.

Contribution

It introduces a method for arbitrary coherent addressing of atoms in a 3D lattice with minimal crosstalk, enhancing neutral atom quantum computing capabilities.

Findings

Successful single-atom addressing in a 5x5x5 lattice

Targeted gates cause less than 0.3% fidelity loss in non-targeted atoms

Reconfigurable laser beams enable scalable quantum control

Abstract

We demonstrate arbitrary coherent addressing of individual neutral atoms in a $5\times 5\times 5$ array formed by an optical lattice. Addressing is accomplished using rapidly reconfigurable crossed laser beams to selectively ac Stark shift target atoms, so that only target atoms are resonant with state-changing microwaves. The effect of these targeted single qubit gates on the quantum information stored in non-targeted atoms is smaller than $3\times 10^{-3}$ in state fidelity. This is an important step along the path of converting the scalability promise of neutral atoms into reality.