Few-body complexes near narrow two-body resonances

by Prof. Lev Khaykovich

BIU

at Condensed Matter Seminar

Mon, 17 Mar 2025, 11:10
Sacta-Rashi Building for Physics (54), room 207

Abstract

An ubiquitous property of ultracold gases is the tunability of two-body interactions. When these interactions are resonantly enhanced, the quantum mechanical scattering problem supports weakly bound three-body states with universal properties such as independence of details of the short-range interaction potential and discrete scaling invariance. Various aspects of this universality have been successfully demonstrated theoretically and experimentally in several atomic species in recent decades. Lithium, however, remains a notable exception stubbornly refusing to concur with the emergent framework. In this talk I will present an overview of the subject and will describe an increasingly involved theory-experiment collaborative effort to reveal the physics responsible for this puzzling behavior. Specifically, I will show how the three-body interactions are reshaped near a certain type of two-body resonances and unexpectedly protect weakly bound three-body states in the atom-dimer continuum.

Created on 10-03-2025 by Bar Lev, Yevgeny (ybarlev)
Updaded on 10-03-2025 by Bar Lev, Yevgeny (ybarlev)