Pseudopotential for the two-dimensional contact interaction

T. M. Whitehead, L. M. Schonenberg, N. Kongsuwan, R. J. Needs, and G. J. Conduit
Phys. Rev. A 93, 042702 – Published 5 April 2016

Abstract

We propose a smooth pseudopotential for the contact interaction acting between ultracold atoms confined to two dimensions. The pseudopotential reproduces the scattering properties of the repulsive contact interaction up to 200 times more accurately than a hard disk potential, and in the attractive branch gives a tenfold improvement in accuracy over the square well potential. Furthermore, the potential enables diffusion Monte Carlo simulations of the ultracold gas to be run 15 times quicker than was previously possible.

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  • Received 5 February 2016

DOI:https://doi.org/10.1103/PhysRevA.93.042702

©2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

T. M. Whitehead1, L. M. Schonenberg1, N. Kongsuwan2, R. J. Needs1, and G. J. Conduit1

  • 1Cavendish Laboratory, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
  • 2Blackett Laboratory, Prince Consort Road, London, SW7 2AZ, United Kingdom

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Issue

Vol. 93, Iss. 4 — April 2016

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