Pseudopotential for the 2D contact interaction
Physical Review A
American Physical Society
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Whitehead, T., Schonenberg, L., Kongsuwan, N., Needs, R., & Conduit, G. (2016). Pseudopotential for the 2D contact interaction. Physical Review A, 93 042702. https://doi.org/10.1103/PhysRevA.93.042702
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.
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.
External DOI: https://doi.org/10.1103/PhysRevA.93.042702
This record's URL: https://www.repository.cam.ac.uk/handle/1810/254627