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UID:DSC-15606
DTSTART;TZID=Europe/Berlin:20190124T164000
SEQUENCE:1548288576
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20190124T180000
URL:https://dresden-science-calendar.de/calendar/en/detail/15606
LOCATION:TUD\,    
SUMMARY:Theorie-Kolloquium Heyl: Dynamical quantum phase transitions
CLASS:PUBLIC
DESCRIPTION:Speaker: \nInstitute of Speaker: \nTopics:\nWillkommen\n Locati
 on:\n  Name: TUD ()\n  Street:   \n  City:  \n  Phone: \n  Fax: \nDescript
 ion: <p><strong>Dynamical quantum phase transitions</strong></p>  <p>Noneq
 uilibrium states of closed quantum many-body systems defy a thermodynamic<
 br /> description. As a consequence\, constraints such as the principle of
  equal a<br /> priori probabilities in the microcanonical ensemble can be 
 relaxed\, which can<br /> lead to quantum states with novel properties of 
 genuine nonequilibrium nature.<br /> However\, for the theoretical descrip
 tion it is in general not sufficient to<br /> understand nonequilibrium dy
 namics on the basis of the properties of the<br /> involved Hamiltonians. 
 Instead it becomes important to characterize time-<br /> evolution operato
 rs which adds time as an additional scale to the problem. In<br /> this ta
 lk I will summarize recent progress in the field of dynamical quantum<br /
 > phase transitions\, which are phase transitions in time with temporal<br
  /> nonanalyticities in matrix elements of the time-evolution operator. Th
 ese<br /> transitions are therefore not driven by an external control para
 meter\, but<br /> rather occur due to sharp internal changes generated sol
 ely by unitary real-<br /> time dynamics. I will discuss obtained insights
  on general properties of<br /> dynamical quantum phase transitions\, thei
 r physical interpretation\, as well as<br /> recent experimental observati
 ons.</p>
DTSTAMP:20260506T125752Z
CREATED:20190124T000936Z
LAST-MODIFIED:20190124T000936Z
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