Monitoring squeezed collective modes of a 1D Bose gas after an interaction quench using density ripples analysis

Abstract : We investigate the out-of-equilibrium dynamics following a sudden quench of the interaction strength, in a one-dimensional quasi-condensate trapped at the surface of an atom chip. Within a linearized approximation, the system is described by independent collective modes and the quench squeezes the phase space distribution of each mode, leading to a subsequent breathing of each quadrature. We show that the collective modes are resolved by the power spectrum of density ripples which appear after a short time of flight. This allows us to experimentally probe the expected breathing phenomenon. Our results are in good agreement with theoretical predictions which take the longitudinal harmonic confinement into account.
Type de document :
Pré-publication, Document de travail
2017
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https://hal-iogs.archives-ouvertes.fr/hal-01661074
Contributeur : Isabelle Bouchoule <>
Soumis le : lundi 18 décembre 2017 - 10:33:16
Dernière modification le : samedi 13 janvier 2018 - 01:23:38

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  • HAL Id : hal-01661074, version 2
  • ARXIV : 1712.04642

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Max Schemmer, Aisling Johnson, Isabelle Bouchoule. Monitoring squeezed collective modes of a 1D Bose gas after an interaction quench using density ripples analysis. 2017. 〈hal-01661074v2〉

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