Universality in Three- and Four-Body Bound States of Ultracold Atoms - Condensed Matter > Quantum GasesReportar como inadecuado




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Abstract: Under certain circumstances, three or more interacting particles may formbound states. While the general few-body problem is not analytically solvable,the so-called Efimov trimers appear for a system of three particles withresonant two-body interactions. The binding energies of these trimers arepredicted to be universally connected to each other, independent of themicroscopic details of the interaction. By exploiting a Feshbach resonance towidely tune the interactions between trapped ultracold lithium atoms, we findevidence for two universally connected Efimov trimers and their associatedfour-body bound states. A total of eleven precisely determined three- andfour-body features are found in the inelastic loss spectrum. Their relativelocations on either side of the resonance agree well with universal theory,while a systematic deviation from universality is found when comparing featuresacross the resonance.



Autor: Scott E. Pollack, Daniel Dries, Randall G. Hulet

Fuente: https://arxiv.org/







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