Journal
FEW-BODY SYSTEMS
Volume 51, Issue 2-4, Pages 191-206Publisher
SPRINGER WIEN
DOI: 10.1007/s00601-011-0243-8
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Funding
- MIT Pappalardo Fellowship in Physics
- US Department of Energy [DE-FG02-94ER40818]
- U.S. Department of Energy (DOE) [DE-FG02-94ER40818] Funding Source: U.S. Department of Energy (DOE)
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When two particles attract via a resonant short-range interaction, three particles always form an infinite tower of bound states characterized by a discrete scaling symmetry. It has been considered that this Efimov effect exists only in three dimensions. Here we review how the Efimov physics can be liberated from three dimensions by considering two-body and three-body interactions in mixed dimensions and four-body interaction in one dimension. In such new systems, intriguing phenomena appear, such as confinement-induced Efimov effect, Bose-Fermi crossover in Efimov spectrum, and formation of interlayer Efimov trimers. Some of them are observable in ultracold atom experiments and we believe that this study significantly broadens our horizons of universal Efimov physics.
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