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SUMMARY:Dynamical phase transitions and statistics of excitations - Alessa
 ndro Silva (SISSA\; Abdus Salam International Centre for Theoretical Physi
 cs)
DTSTART:20160114T100000Z
DTEND:20160114T110000Z
UID:TALK64631@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Co-authors: Pietro Smacchia		(Rutgers)\, Eugene Demler		(Harva
 rd)\, Michael Knap		(Munich)\, Anna Maraga		(SISSA)<span><br><span><br>Dyn
 amical phase transitions can occur in isolated quantum systems that are br
 ought out of equilibrium by either a sudden or a gradual change of their p
 arameters. Theoretical examples range from the behaviour of the O(N) model
  as well as spin-models with long range interactions both showing dynamica
 l criticality in their prethermal steady-states. In this talk I will start
  by discussing the characterization of such dynamical phase transitions ba
 sed on the statistics of produced excitations. I will also discuss the rol
 e of fluctuations as well as on the differences between sudden and gradual
  changes of the system parameters. Finally\, I will discuss the emergence 
 of zeroes in the Loschmidt amplitude attempting to elucidate their physica
 l meaning in connection with the dynamical transitions above.</span></span
 >
LOCATION:Seminar Room 1\, Newton Institute
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