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TZID:Europe/Vienna
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DTSTART:20170326T030000
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TZOFFSETTO:+0200
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DTSTART:20171029T020000
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DTSTAMP:20260428T112243Z
UID:593e7ce54d82d442358604@ist.ac.at
DTSTART:20170801T110000
DTEND:20170801T123000
DESCRIPTION:Speaker: Wen Wei Ho\nhosted by Maksym Serbyn\nAbstract: Spontan
 eous symmetry-breaking is a fundamental concept in physics that underpins 
 much of our understanding of equilibrium phases of matter\, such as the sh
 arp distinction between a solid crystalline phase and a liquid phase arisi
 ng from spontaneously broken spatial translational symmetry. Recently\, it
  was realized that time-translational symmetry can also be spontaneously b
 roken [1\,2]. More precisely\, periodically-driven (Floquet) disordered in
 teracting many-body systems may exhibit such a phenomenon -- in such syste
 ms\, physical observables exhibit robust oscillations that is an integer m
 ultiple of the driving period T -- leading to a novel\, nonequilibrium pha
 se of matter dubbed a ``discrete time crystal" (DTC).  In this talk\, I wi
 ll introduce the idea of discrete time crystals\, and discuss the key conc
 epts involved in defining this new nonequilibrium phase of matter. I will 
 also explain the mechanism by which the DTC phase is stabilized\, such as 
 many-body localization (MBL) or `critically-slow' thermalization in disord
 ered long-range systems [3]\, thereby providing an explanation for the rec
 ent experimental observation of robust DTC order in a diamond sample with 
 NV-center impurities [4].\n\n[1] Else\, D.\, Bauer\, B. and Nayak\, C.\,  
 Phys. Rev. Lett (117) 090402 (2016)\n[2] von Keyserlingk\, C.W.\, Khemani\
 , V. and Sondhi\, S.\, Phys. Rev. B (94) 085112 (2016)\n[3] Ho\, W. W.\, C
 hoi\, S.\, Lukin\, M.\, and Abanin\, D.\, Phys. Rev. Lett (119) 010602 (20
 17)\n[4] Choi\, S. et al.\, Nature 543\, 221–225 (2017)
LOCATION:Big Seminar room Ground floor / Office Bldg West (I21.EG.101)\, IS
 TA
ORGANIZER:jdeanton@ist.ac.at
SUMMARY:Wen Wei Ho: Discrete (Floquet) Time Crystals
URL:https://talks-calendar.ista.ac.at/events/687
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