Abstract:
:We present experimental evidence for scale invariant behaviour of the excitation spectrum in phase-fluctuating quasi-1d Bose gases after a rapid change of the external trapping potential. Probing density correlations in free expansion, we find that the temperature of an initial thermal state scales with the spatial extension of the cloud as predicted by a model based on adiabatic rescaling of initial eigenmodes with conserved quasiparticle occupation numbers. Based on this result, we demonstrate that shortcuts to adiabaticity for the rapid expansion or compression of the gas do not induce additional heating.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Rohringer W,Fischer D,Steiner F,Mazets IE,Schmiedmayer J,Trupke Mdoi
10.1038/srep09820subject
Has Abstractpub_date
2015-04-13 00:00:00pages
9820issn
2045-2322pii
srep09820journal_volume
5pub_type
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