Entangling identical bosons in optical tweezers via exchange interaction

TL;DR

This paper proposes schemes for entangling identical bosonic atoms in optical tweezers using exchange interactions, enabling universal gates and Bell pair preparation for quantum information tasks.

Contribution

It introduces novel methods leveraging particle symmetries to perform entangling gates and Bell pair generation with optical tweezers, advancing quantum communication capabilities.

Findings

Successful design of a universal entangling gate via controlled collisions.

Modified scheme for preparing atomic Bell pairs through selective excitation.

Potential for creating weighted graph states and conducting loophole-free Bell tests.

Abstract

We first devise a scheme to perform a universal entangling gate via controlled collisions between pairs of atomic qubits trapped with optical tweezers. Second, we present a modification to this scheme to allow the preparation of atomic Bell pairs via selective excitation, suitable for quantum information processing applications that do not require universality. Both these schemes are enabled by the inherent symmetries of identical composite particles, as originally proposed by Hayes et al. Our scheme provides a technique for producing weighted graph states, entangled resources for quantum communication, and a promising approach to performing a "loophole free" Bell test in a single laboratory.