Pseudopotential for the two-dimensional contact interaction
Accepted version
Peer-reviewed
Repository URI
Repository DOI
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
2469-9934
Volume Title
93
Publisher
American Physical Society (APS)
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/J017639/1)
EPSRC (1492522)
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.