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Super Efimov effect for mass-imbalanced systems
University of Washington, USA ; University of Colorado, USA; .ORCID-id: 0000-0002-4615-2507
Tokyo Institute of Technology, JPN.
2014 (engelsk)Inngår i: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 90, nr 6, artikkel-id 063631Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We study two species of particles in two dimensions interacting by isotropic short-range potentials with the interspecies potential fine-tuned to a p-wave resonance. Their universal low-energy physics can be extracted by analyzing a properly constructed low-energy effective field theory with the renormalization group method. Consequently, a three-body system consisting of two particles of one species and one of the other is shown to exhibit the super Efimov effect, the emergence of an infinite tower of three-body bound states with orbital angular momentum l = +/- 1 whose binding energies obey a doubly exponential scaling, when the two particles are heavier than the other by a mass ratio greater than 4.034 04 for identical bosons and 2.414 21 for identical fermions. With increasing the mass ratio, the super Efimov spectrum becomes denser which would make its experimental observation easier. We also point out that the Born-Oppenheimer approximation is incapable of reproducing the super Efimov effect, the universal low-energy asymptotic scaling of the spectrum.

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American Physical Society, 2014. Vol. 90, nr 6, artikkel-id 063631
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URN: urn:nbn:se:kau:diva-87176DOI: 10.1103/PhysRevA.90.063631ISI: 000346824600014OAI: oai:DiVA.org:kau-87176DiVA, id: diva2:1624816
Tilgjengelig fra: 2022-01-05 Laget: 2022-01-05 Sist oppdatert: 2023-06-20bibliografisk kontrollert

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