Efimov physics beyond three particles
arXiv:1812.11499 · doi:10.1007/978-3-030-32357-8_139
Abstract
Efimov physics originally refers to a system of three particles. Here we review recent theoretical progress seeking for manifestations of Efimov physics in systems composed of more than three particles. Clusters of more than three bosons are tied to each Efimov trimer, but no independent Efimov physics exists there beyond three bosons. The case of a few heavy fermions interacting with a lighter atom is also considered, where the mass ratio of the constituent particles plays a significant role. Following Efimov's study of the (2+1) system, the (3+1) system was shown to have its own critical mass ratio to become Efimovian. We show that the (4+1) system becomes Efimovian at a mass ratio which is smaller than its sub-systems thresholds, giving a pure five-body Efimov effect. The (5+1) and (6+1) systems are also discussed, and we show the absence of 6- and 7-body Efimov physics there.
References in corpus (11)
- Efimov Physics: a review
- Observation of an Efimov spectrum in an atomic system
- Observation of universality in ultracold 7Li three-body recombination
- Universal Properties of the Four-Body System with Large Scattering Length
- Low-energy three-body dynamics in binary quantum gases
- Four-Body Scale in Universal Few-Boson Systems
- Five-Body Efimov Effect and Universal Pentamer in Fermionic Mixtures
- Effective Field Theory for Few-Boson Systems
- Energy of N two-dimensional bosons with zero-range interactions
- Short Range Scaling Laws of Quantum Gases With Contact Interactions
- Mass-imbalanced fermionic mixture in a harmonic trap