The Universality of the Efimov Three-body Parameter
نویسندگان
چکیده
منابع مشابه
Origin of the three-body parameter universality in Efimov physics.
In recent years extensive theoretical and experimental studies of universal few-body physics have advanced our understanding of universal Efimov physics. Whereas theory had been the driving force behind our understanding of Efimov physics for decades, recent experiments have contributed an unexpected discovery. Specifically, measurements have found that the so-called three-body parameter determ...
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We measure the critical scattering length for the appearance of the first three-body bound state, or Efimov three-body parameter, at seven different Feshbach resonances in ultracold ^{39}K atoms. We study both intermediate and narrow resonances, where the three-body spectrum is expected to be determined by the nonuniversal coupling of two scattering channels. Instead, our observed ratio of the ...
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We report on the observation of triatomic Efimov resonances in an ultracold gas of cesium atoms. Exploiting the wide tunability of interactions resulting from three broad Feshbach resonances in the same spin channel, we measure magnetic-field dependent three-body recombination loss. The positions of the loss resonances yield corresponding values for the three-body parameter, which in universal ...
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The low-energy spectrum of three particles interacting via nearly resonant two-body interactions in the Efimov regime is set by the so-called three-body parameter. We show that the three-body parameter is essentially determined by the zero-energy two-body correlation. As a result, we identify two classes of two-body interactions for which the three-body parameter has a universal value in units ...
متن کاملEfimov states with strong three-body losses
Introduction. – Motivated by nuclear physics, Efimov discovered that three particles with short-ranged two-body interactions of scattering length |a| = ∞ can support an infinite series of weakly bound trimer states [1]. In contrast to systems of nucleons or of He atoms, ultracold gases of alkali metal atoms offer the possibility to tune a by using a Feshbach resonance, and thus to go more deepl...
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ژورنال
عنوان ژورنال: Few-Body Systems
سال: 2013
ISSN: 0177-7963,1432-5411
DOI: 10.1007/s00601-013-0616-2