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Observation of the Second Triatomic Resonance in Efimov's Scenario

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arxiv 1402.6161 v2 pith:PAV7TUSP submitted 2014-02-25 cond-mat.quant-gas physics.atom-phquant-ph

classification cond-mat.quant-gasphysics.atom-phquant-ph
keywords resonanceefimovobservationatomsfirstscalingsecondthree
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abstract

We report the observation of a three-body recombination resonance in an ultracold gas of cesium atoms at a very large negative value of the $s$-wave scattering length. The resonance is identified as the second triatomic Efimov resonance, which corresponds to the situation where the first excited Efimov state appears at the threshold of three free atoms. This observation, together with a finite-temperature analysis and the known first resonance, allows the most accurate demonstration to date of the discrete scaling behavior at the heart of Efimov physics. For the system of three identical bosons, we obtain a scaling factor of $21.0(1.3)$, close to the ideal value of $22.7$.

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  1. Rabi Oscillations of Strongly Driven Bose Polarons

    cond-mat.quant-gas 2025-04 conditional novelty 6.0 of 10

    A trial-wavefunction calculation predicts anomalous Rabi oscillations and a steady-state magnetization for strongly driven Bose polarons when attractive and repulsive polaron branches coexist.

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