Repository logo
 

Pseudopotential for the two-dimensional contact interaction

Accepted version
Peer-reviewed

Repository DOI


Type

Article

Change log

Authors

Whitehead, TM 
Schonenberg, LM 
Kongsuwan, N 
Needs, RJ 
Conduit, GJ 

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 10-fold improvement in accuracy over the square well potential. Furthermore, the new potential enables diffusion Monte Carlo simulations of the ultracold gas to be run 15 times quicker than was previously possible.

Description

Keywords

cond-mat.quant-gas, cond-mat.quant-gas

Journal Title

Physical Review A

Conference Name

Journal ISSN

2469-9926
2469-9934

Volume Title

93

Publisher

American Physical Society (APS)
Sponsorship
Engineering and Physical Sciences Research Council (EP/J017639/1)
EPSRC (1492522)
The authors acknowledge the financial support of the EPSRC [EP/J017639/1]; LMS acknowledges financial support from the Cambridge European Trust, VSB Fonds, and De Breed Kreiken Innovatie Fonds of the Prins Bernhard Cultuurfonds; and GJC acknowledges the financial support of the Royal Society and Gonville & Caius College. Computational facilities were provided by the University of Cambridge High Performance Computing Service.