Quantum liquid droplets in a mixture of Bose-Einstein condensates

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hdl:2117/111147
Document typeArticle
Defense date2017
Rights accessOpen Access
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ProjectMAG-QUPT - Exploring magnetic quantum phase transitions with ultra-cold Fermi gases (EC-FP7-631633)
QUIC - Quantum simulations of insulators and conductors (EC-H2020-641122)
SIMULACION CUANTICA CON GASES ULTRAFRIOS FUERTEMENTE CORRELACIONADOS (MINECO-FIS2014-59546-P)
AGR-INSTITUTO DE CIENCIAS FOTONICAS (MINECO-SEV-2015-0522)
BES-2015-072186 (MINECO-BES-2015-072186)
TOP-DOL - Topological physics in tunable optical lattices (EC-H2020-657439)
RYC-2015-17890 (MINECO-RYC-2015-17890)
QUIC - Quantum simulations of insulators and conductors (EC-H2020-641122)
SIMULACION CUANTICA CON GASES ULTRAFRIOS FUERTEMENTE CORRELACIONADOS (MINECO-FIS2014-59546-P)
AGR-INSTITUTO DE CIENCIAS FOTONICAS (MINECO-SEV-2015-0522)
BES-2015-072186 (MINECO-BES-2015-072186)
TOP-DOL - Topological physics in tunable optical lattices (EC-H2020-657439)
RYC-2015-17890 (MINECO-RYC-2015-17890)
Abstract
Quantum droplets are small clusters of atoms self-bound by the balance of attractive and repulsive
forces. Here we report on the observation of a novel type of droplets, solely stabilized by contact
interactions in a mixture of two Bose-Einstein condensates. We demonstrate that they are several
orders of magnitude more dilute than liquid helium by directly measuring their size and density
via in situ imaging. Moreover, by comparison to a single-component condensate, we show that
quantum many-body effects stabilize them against collapse. We observe that droplets require a
minimum atom number to be stable. Below, quantum pressure drives a liquid-to-gas transition that
we map out as a function of interaction strength. These ultra-dilute isotropic liquids remain weakly
interacting and constitute an ideal platform to benchmark quantum many-body theories.
Description
Bose-Einstein condensates quantum mixtures quantum liquids quantum fluctuations
DatasetCabrera, C. R. [et al.]. (2017). Quantum liquid droplets in a mixture of Bose-Einstein condensates [Dataset]. 1 v. Universitat Politècnica de Catalunya.
http://hdl.handle.net/2117/111148
CitationCabrera, C. R. [et al.]. Quantum liquid droplets in a mixture of Bose-Einstein condensates. 2017.
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