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dc.contributor.authorSchulz, Maximilian
dc.contributor.authorTaylor, Scott Richard
dc.contributor.authorHooley, Christopher Andrew
dc.contributor.authorScardicchio, Antonello
dc.date.accessioned2019-04-10T16:30:01Z
dc.date.available2019-04-10T16:30:01Z
dc.date.issued2018-11-05
dc.identifier.citationSchulz , M , Taylor , S R , Hooley , C A & Scardicchio , A 2018 , ' Energy transport in a disordered spin chain with broken U(1) symmetry : diffusion, subdiffusion, and many-body localization ' , Physical Review. B, Condensed matter and materials physics , vol. 98 , no. 18 , 180201(R) . https://doi.org/10.1103/PhysRevB.98.180201en
dc.identifier.issn1098-0121
dc.identifier.otherPURE: 257972331
dc.identifier.otherPURE UUID: 555d0ea5-16c1-4dad-92e3-2762b64d0557
dc.identifier.otherScopus: 85056266196
dc.identifier.otherORCID: /0000-0002-9976-2405/work/54818781
dc.identifier.otherWOS: 000449293300001
dc.identifier.urihttp://hdl.handle.net/10023/17498
dc.descriptionFunding: MS and SRT acknowledge financial support from the CM-CDT under EPSRC (UK) grants EP/G03673X/1 and EP/L015110/1. CAH acknowledges financial support from the TOPNES programme under EPSRC (UK) grant number EP/I031014/1.en
dc.description.abstractWe explore the physics of the disordered XYZ spin chain using two complementary numerical techniques: exact diagonalization (ED) on chains of up to 17 spins, and time-evolving block decimation (TEBD) on chains of up to 400 spins. Our principal findings are as follows. First, we verify that the clean XYZ spin chain shows ballistic energy transport for all parameter values that we investigated. Second, for weak disorder there is a stable diffusive region that persists up to a critical disorder strength that depends on the XY anisotropy. Third, for disorder strengths above this critical value, energy transport becomes increasingly subdiffusive. Fourth, the many-body localization transition moves to significantly higher disorder strengths as the XY anisotropy is increased. We discuss these results, and their relation to our current physical picture of subdiffusion in the approach to many-body localization.
dc.format.extent10
dc.language.isoeng
dc.relation.ispartofPhysical Review. B, Condensed matter and materials physicsen
dc.rights© 2018, American Physical Society. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1103/PhysRevB.98.180201en
dc.subjectQC Physicsen
dc.subjectNDASen
dc.subject.lccQCen
dc.titleEnergy transport in a disordered spin chain with broken U(1) symmetry : diffusion, subdiffusion, and many-body localizationen
dc.typeJournal articleen
dc.contributor.sponsorEPSRCen
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews. Centre for Designer Quantum Materialsen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.98.180201
dc.description.statusPeer revieweden
dc.identifier.urlhttps://arxiv.org/abs/1805.01036en
dc.identifier.grantnumberEP/I031014/1en


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