cam.issuedOnline	2015-07-30
dc.contributor.author	Schreiber, Michael
dc.contributor.author	Hodgman, Sean S
dc.contributor.author	Bordia, Pranjal
dc.contributor.author	Lüschen, Henrik P
dc.contributor.author	Fischer, Mark H
dc.contributor.author	Vosk, Ronen
dc.contributor.author	Altman, Ehud
dc.contributor.author	Schneider, Ulrich
dc.contributor.author	Bloch, Immanuel
dc.contributor.orcid	Schneider, Ulrich [0000-0003-4345-9498]
dc.date.accessioned	2019-11-05T10:40:54Z
dc.date.available	2019-11-05T10:40:54Z
dc.date.issued	2015-08-21
dc.description.abstract	Many-body localization (MBL), the disorder-induced localization of interacting particles, signals a breakdown of conventional thermodynamics because MBL systems do not thermalize and show nonergodic time evolution. We experimentally observed this nonergodic evolution for interacting fermions in a one-dimensional quasirandom optical lattice and identified the MBL transition through the relaxation dynamics of an initially prepared charge density wave. For sufficiently weak disorder, the time evolution appears ergodic and thermalizing, erasing all initial ordering, whereas above a critical disorder strength, a substantial portion of the initial ordering persists. The critical disorder value shows a distinctive dependence on the interaction strength, which is in agreement with numerical simulations. Our experiment paves the way to further detailed studies of MBL, such as in noncorrelated disorder or higher dimensions.
dc.description.sponsorship	We acknowledge financial support by the Deutsche Forschungsgemeinschaft (FOR801, Deutsch-Israelisches Kooperationsprojekt Quantum phases of ultracold atoms in optical lattices), the European Commission (UQUAM and AQuS), the U.S. Defense Advanced Research Projects Agency (Quantum Emulations of New Materials Using Ultracold Atoms), the Minerva Foundation, ISF grant no. 1594/11, Nanosystems Initiative Munich (NIM), and the Swiss Society of Friends of the Weizmann Institute.
dc.format.medium	Print-Electronic
dc.identifier.doi	10.17863/CAM.45758
dc.identifier.eissn	1095-9203
dc.identifier.issn	0036-8075
dc.identifier.uri	https://www.repository.cam.ac.uk/handle/1810/298701
dc.language	eng
dc.language.iso	eng
dc.publisher	American Association for the Advancement of Science (AAAS)
dc.publisher.url	http://dx.doi.org/10.1126/science.aaa7432
dc.subject	cond-mat.quant-gas
dc.subject	cond-mat.quant-gas
dc.subject	cond-mat.dis-nn
dc.subject	cond-mat.str-el
dc.subject	quant-ph
dc.title	QUANTUM GASES. Observation of many-body localization of interacting fermions in a quasirandom optical lattice.
dc.type	Article
dcterms.dateAccepted	2015-07-21
prism.endingPage	845
prism.issueIdentifier	6250
prism.publicationDate	2015
prism.publicationName	Science
prism.startingPage	842
prism.volume	349
rioxxterms.licenseref.startdate	2015-08
rioxxterms.licenseref.uri	http://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.type	Journal Article/Review
rioxxterms.version	AM
rioxxterms.versionofrecord	10.1126/science.aaa7432

QUANTUM GASES. Observation of many-body localization of interacting fermions in a quasirandom optical lattice.

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