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dc.contributor.author
Landig, Renate
dc.contributor.author
Brennecke, Ferdinand
dc.contributor.author
Mottl, Rafael
dc.contributor.author
Donner, Tobias Ulrik
dc.contributor.author
Esslinger, Tilman
dc.date.accessioned
2018-09-12T10:57:26Z
dc.date.available
2017-06-11T18:00:45Z
dc.date.available
2018-09-12T10:57:26Z
dc.date.issued
2015
dc.identifier.issn
2041-1723
dc.identifier.other
10.1038/ncomms8046
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/101960
dc.identifier.doi
10.3929/ethz-b-000101960
dc.description.abstract
The dynamic structure factor is a central quantity describing the physics of quantum many-body systems, capturing structure and collective excitations of a material. In condensed matter, it can be measured via inelastic neutron scattering, which is an energy-resolving probe for the density fluctuations. In ultracold atoms, a similar approach could so far not be applied because of the diluteness of the system. Here we report on a direct, real-time and nondestructive measurement of the dynamic structure factor of a quantum gas exhibiting cavity-mediated long-range interactions. The technique relies on inelastic scattering of photons, stimulated by the enhanced vacuum field inside a high finesse optical cavity. We extract the density fluctuations, their energy and lifetime while the system undergoes a structural phase transition. We observe an occupation of the relevant quasi-particle mode on the level of a few excitations, and provide a theoretical description of this dissipative quantum many-body system.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Nature Publishing Group
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Measuring the dynamic structure factor of a quantum gas undergoing a structural phase transition
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2015-05-06
ethz.journal.title
Nature Communications
ethz.journal.volume
6
en_US
ethz.journal.abbreviated
Nat Commun
ethz.pages.start
7046
en_US
ethz.size
6 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.nebis
007044158
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02510 - Institut für Quantenelektronik / Institute for Quantum Electronics::03599 - Esslinger, Tilman / Esslinger, Tilman
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02510 - Institut für Quantenelektronik / Institute for Quantum Electronics::03599 - Esslinger, Tilman / Esslinger, Tilman
ethz.date.deposited
2017-06-11T18:01:00Z
ethz.source
ECIT
ethz.identifier.importid
imp593653451592b12190
ethz.ecitpid
pub:160073
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-13T17:55:43Z
ethz.rosetta.lastUpdated
2019-02-03T07:53:44Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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