Vortex sorter for Bose-Einstein condensates

TL;DR

This paper introduces a novel interferometric method to sort Bose-Einstein condensates by their vortex components using asymmetric phase imprinting, with potential applications in quantum information processing.

Contribution

The paper presents a new interferometric scheme and phase imprinting technique for sorting BEC vortices by topological charge, advancing quantum control methods.

Findings

Successfully modeled vortex sorting for various BEC states

Demonstrated differentiation of vortex components with even and odd topological charges

Proposed applications in quantum information processing

Abstract

We have designed interferometers that sort Bose-Einstein condensates into their vortex components. The Bose-Einstein condensates in the two arms of the interferometer are rotated with respect to each other through fixed angles; different vortex components then exit the interferometer in different directions. The method we use to rotate the Bose-Einstein condensates involves asymmetric phase imprinting and is itself new. We have modelled rotation through fixed angles and sorting into vortex components with even and odd values of the topological charge of 2-dimensional Bose-Einstein condensates in a number of states (pure or superposition vortex states for different values of the scattering length). Our scheme may have applications for quantum information processing.