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CCQ Seminar

Speaker: Thomas Guldager Skov "Observation of a Lee-Huang-Yang Fluid".

26.03.2021 | CCQ

Dato ons 16 jun
Tid 15:00 16:00
Sted Zoom

Abstract:

Thomas G. Skov, Magnus G. Skou, Nils B. Jørgensen, Jan J. Arlt

We observe monopole oscillations in a mixture of Bose-Einstein condensates, where the usually dominant mean-field interactions are canceled. In this case, the system is governed by the next-order Lee-Huang-Yang (LHY) correction to the ground state energy, which describes the effect of quantum fluctuations. Experimentally such a LHY fluid is realized by controlling the atom numbers and interaction strengths in a 39K spin mixture confined in a spherical trap potential. We measure the monopole oscillation frequency and find excellent agreement with simulations of the complete experiment including the excitation procedure and inelastic losses.

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