van der Waals interaction as the starting point for an effective field theory

Odell, Daniel; Deltuva, Arnoldas; Platter, Lucas

doi:10.1103/physreva.104.023306

van der Waals interaction as the starting point for an effective field theory

Journal Article · Wed Aug 04 00:00:00 EDT 2021 · Physical Review A

DOI:https://doi.org/10.1103/physreva.104.023306· OSTI ID:1821985

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Univ. of Tennessee, Knoxville, TN (United States); Ohio Univ., Athens, OH (United States)
Vilnius University (Lithuania)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

We consider the system of three ⁴He atoms to assess whether a pure van der Waals potential can be used as a starting point for an effective field theory to describe three-body processes in ultracold atomic systems. Using a long-range van der Waals interaction in combination with short-distance two-body counterterms, we analyze the dependence of two- and three-body observables on the short-distance regulator that is required due to the singular nature of the van der Waals interaction. We benchmark our approach with results obtained with the realistic ⁴He-⁴He LM2M2 potential and find good agreement. We furthermore show that in this effective field theory approach no three-body force is required at leading order and that universal van der Waals physics leads to a universal correlation between three-body observables in the absence of an Efimov three-body parameter.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1821985

Journal Information:: Physical Review A, Journal Name: Physical Review A Journal Issue: 2 Vol. 104; ISSN 2469-9926

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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74 ATOMIC AND MOLECULAR PHYSICS
Atomic & molecular collisions
Interatomic & molecular potentials
Ultracold collisions
Van der Waals interaction

van der Waals interaction as the starting point for an effective field theory

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