Five-Body Efimov Effect and Universal Pentamer in Fermionic Mixtures

We show that four heavy fermions interacting resonantly with a lighter atom (4+1 system) become Efimovian at mass ratio 13.279(2), which is smaller than the corresponding 2+1 and 3+1 thresholds. We thus predict the five-body Efimov effect for this system in the regime where any of its subsystem is n...

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Veröffentlicht in:	Physical review letters 2017-02, Vol.118 (8), p.083002-083002, Article 083002
Hauptverfasser:	Bazak, B, Petrov, D S
Format:	Artikel
Sprache:	eng
Schlagworte:	Atomic Physics Atomic properties Condensed Matter Fermions Mass ratios Mathematical analysis Physics Quantum Gases Quantum Physics Thresholds Trimers
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description	We show that four heavy fermions interacting resonantly with a lighter atom (4+1 system) become Efimovian at mass ratio 13.279(2), which is smaller than the corresponding 2+1 and 3+1 thresholds. We thus predict the five-body Efimov effect for this system in the regime where any of its subsystem is non-Efimovian. For smaller mass ratios we show the existence and calculate the energy of a universal 4+1 pentamer state, which continues the series of the 2+1 trimer predicted by Kartavtsev and Malykh and 3+1 tetramer discovered by Blume. We also show that the effective-range correction for the light-heavy interaction has a strong effect on all these states and larger effective ranges increase their tendency to bind.
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subjects	Atomic Physics Atomic properties Condensed Matter Fermions Mass ratios Mathematical analysis Physics Quantum Gases Quantum Physics Thresholds Trimers
title	Five-Body Efimov Effect and Universal Pentamer in Fermionic Mixtures
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