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Super Efimov Effect of Resonantly Interacting Fermions in Two Dimensions
Los Alamos National Laboratory, USA.
University of Washington, USA.ORCID iD: 0000-0002-4615-2507
University of Chicago, USA.
2013 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 110, no 23Article in journal (Refereed) Published
Abstract [en]

We study a system of spinless fermions in two dimensions with a short-range interaction fine-tuned to a p-wave resonance. We show that three such fermions form an infinite tower of bound states of orbital angular momentum l = +/- 1 and their binding energies obey a universal doubly exponential scaling E-3((n)) proportional to exp(-2e(3 pi n/4+theta)) at large n. This “super Efimov effect” is found by a renormalization group analysis and confirmed by solving the bound state problem. We also provide an indication that there are l = +/- 2 four-body resonances associated with every three-body bound state at E-4((n)) proportional to exp(-2e(3 pi n/4+theta-0.188)). These universal few-body states may be observed in ultracold atom experiments and should be taken into account in future many-body studies of the system.

Place, publisher, year, edition, pages
American Physical Society, 2013. Vol. 110, no 23
National Category
Subatomic Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:kau:diva-87181DOI: 10.1103/PhysRevLett.110.235301ISI: 000320115000013OAI: oai:DiVA.org:kau-87181DiVA, id: diva2:1624810
Available from: 2022-01-05 Created: 2022-01-05 Last updated: 2023-06-20Bibliographically approved

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Moroz, Sergej

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