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dc.contributor.author
Dreon, Davide
dc.contributor.author
Sidorenkov, Leonid A.
dc.contributor.author
Bouazza, Chayma
dc.contributor.author
Maineult, Wilfried
dc.contributor.author
Dalibard, Jean
dc.contributor.author
Nascimbene, Sylvain
dc.date.accessioned
2019-09-30T09:06:19Z
dc.date.available
2019-09-27T12:36:56Z
dc.date.available
2019-09-30T09:05:04Z
dc.date.available
2019-09-30T09:06:19Z
dc.date.issued
2017-03-28
dc.identifier.issn
1361-6455
dc.identifier.issn
0368-3508
dc.identifier.issn
0953-4075
dc.identifier.issn
0022-3700
dc.identifier.other
10.1088/1361-6455/aa5db5
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/366988
dc.identifier.doi
10.3929/ethz-b-000366988
dc.description.abstract
From the study of long-range-interacting systems to the simulation of gauge fields, open-shell lanthanide atoms with their large magnetic moment and narrow optical transitions open novel directions in the field of ultracold quantum gases. As for other atomic species, the magneto-optical trap (MOT) is the working horse of experiments but its operation is challenging, due to the large electronic spin of the atoms. Here we present an experimental study of narrow-line dysprosium MOTs. We show that the combination of radiation pressure and gravitational forces leads to a spontaneous polarization of the electronic spin. The spin composition is measured using a Stern–Gerlach separation of spin levels, revealing that the gas becomes almost fully spin-polarized for large laser frequency detunings. In this regime, we reach the optimal operation of the MOT, with samples of typically 3 x 10^8 atoms at a temperature of 15 μK. The spin polarization reduces the complexity of the radiative cooling description, which allows for a simple model accounting for our measurements. We also measure the rate of density-dependent atom losses, finding good agreement with a model based on light-induced Van der Waals forces. A minimal two-body loss rate beta~ 2 x 10^-11} cm3 s–1 is reached in the spin-polarized regime. Our results constitute a benchmark for the experimental study of ultracold gases of magnetic lanthanide atoms.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Institute of Physics
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.subject
laser cooling
en_US
dc.subject
ultracold dysprosium
en_US
dc.subject
ultracold atoms
en_US
dc.title
Optical cooling and trapping of highly magnetic atoms: the benefits of a spontaneous spin polarization
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2017-03-07
ethz.journal.title
Journal of Physics B: Atomic, Molecular and Optical Physics
ethz.journal.volume
50
en_US
ethz.journal.issue
6
en_US
ethz.journal.abbreviated
J. Phys. B: At. Mol. Opt. Phys
ethz.pages.start
065005
en_US
ethz.size
12 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.publication.place
Bristol
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.date.deposited
2019-09-27T12:37:09Z
ethz.source
FORM
ethz.eth
no
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-09-30T09:05:23Z
ethz.rosetta.lastUpdated
2021-02-15T06:03:57Z
ethz.rosetta.versionExported
true
ethz.COinS
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