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VERSION:2.0
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BEGIN:VEVENT
SUMMARY:Probing the system’s dynamics around dynamical quantum phase tra
 nsitions
DTSTART:20230531T143000Z
DTEND:20230531T160000Z
DTSTAMP:20260623T171431Z
UID:96f1ab23-e626-46ed-a5f9-8d1e8e1aeceb
SEQUENCE:1
CREATED:20230525T081946Z
DESCRIPTION: Dynamical quantum phase transitions (DQPTs) are defined by th
 e non-analyticity intime in the Loschmidt echo\, which measures the overla
 p between the time-evolvedstate and the initial state when a system is bro
 ught out of equilibrium. While the studyof DQPTs has been thriving\, how t
 he system behaves around the critical time remainsan open question. In thi
 s talk\, we will explore the dynamics of the many-body systemsaround DQPT 
 using various probes. We find that the extrema in the time evolutionof the
  equilibrium order parameter are connected to DQPTs in the Su-SchreifferHe
 eger model. We will also discuss how the correlations spread under the inf
 luence ofinter and intra- cell interactions in the model as probed by uneq
 ual time Greenfunctions. The concept of Loschmidt amplitude spectrum – a
 n extension of theLoschmidt echo measures will also be introduced. The spe
 ctrum suggests there is apopulation redistribution in the momentum space a
 cross the transition in thequantum Ising model\, providing us new insight 
 into the behaviour of the systemaround DQPTs. 
LAST-MODIFIED:20230525T081946Z
LOCATION:Sala de Seminários do DF\,  Pavilhão de Física\, 2º piso
URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/probing-the-systems-dynami
 cs-around-dynamical-quantum-phase-transitions/
X-ALT-DESC;FMTTYPE=text/html:<p data-block-key="f0prb"> Dynamical quantum 
 phase transitions (DQPTs) are defined by the non-analyticity intime in the
  Loschmidt echo\, which measures the overlap between the time-evolvedstate
  and the initial state when a system is brought out of equilibrium. While 
 the studyof DQPTs has been thriving\, how the system behaves around the cr
 itical time remainsan open question. <br/><br/>In this talk\, we will expl
 ore the dynamics of the many-body systemsaround DQPT using various probes.
  We find that the extrema in the time evolutionof the equilibrium order pa
 rameter are connected to DQPTs in the Su-SchreifferHeeger model. We will a
 lso discuss how the correlations spread under the influence ofinter and in
 tra- cell interactions in the model as probed by unequal time Greenfunctio
 ns. <br/><br/>The concept of Loschmidt amplitude spectrum – an extension
  of theLoschmidt echo measures will also be introduced. The spectrum sugge
 sts there is apopulation redistribution in the momentum space across the t
 ransition in thequantum Ising model\, providing us new insight into the be
 haviour of the systemaround DQPTs. </p>
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