Producing superfluid circulation states using phase imprinting

Avinash Kumar, Romain Dubessy, Thomas Badr, Camilla De Rossi, Mathieu de Goër de Herve, Laurent Longchambon, and Hélène Perrin
Phys. Rev. A 97, 043615 – Published 17 April 2018
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Abstract

We propose a method to prepare states of given quantized circulation in annular Bose-Einstein condensates (BEC) confined in a ring trap using the method of phase imprinting without relying on a two-photon angular momentum transfer. The desired phase profile is imprinted on the atomic wave function using a short light pulse with a tailored intensity pattern generated with a spatial light modulator. We demonstrate the realization of “helicoidal” intensity profiles suitable for this purpose. Due to the diffraction limit, the theoretical steplike intensity profile is not achievable in practice. We investigate the effect of imprinting an intensity profile smoothed by a finite optical resolution onto the annular BEC with a numerical simulation of the time-dependent Gross-Pitaevskii equation. This allows us to optimize the intensity pattern for a given target circulation to compensate for the limited resolution.

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  • Received 12 January 2018

DOI:https://doi.org/10.1103/PhysRevA.97.043615

©2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Avinash Kumar1,2, Romain Dubessy2,1, Thomas Badr1,2, Camilla De Rossi2,1, Mathieu de Goër de Herve2,1, Laurent Longchambon2,1, and Hélène Perrin1,2

  • 1CNRS, UMR 7538, F-93430 Villetaneuse, France
  • 2Université Paris 13, Sorbonne Paris Cité, Laboratoire de Physique des Lasers, F-93430 Villetaneuse, France

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Issue

Vol. 97, Iss. 4 — April 2018

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