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SUMMARY:Some aspects in many-body quantum dynamics: from multi-channel Kon
 do impurities to entanglement transition in SU(1\,1) periodically driven s
 ystems - Po-Yao Chang\, National Tsing Hua University
DTSTART:20240424T100000Z
DTEND:20240424T110000Z
UID:TALK215389@talks.cam.ac.uk
CONTACT:Gaurav
DESCRIPTION:Quantum dynamics plays an essential role in many-body systems.
  It not only describes the time evolutions of observable quantities but al
 so reveals how information is processed in the quantum systems. In this ta
 lk\, we first demonstrate some universal properties of the evolution of en
 tanglement spectra under generic quantum dynamics\, providing a deeper und
 erstanding of quantum thermalization. Secondly\, we investigate the transi
 ent dynamics and long-time quasi-equilibrium properties in multi-channel K
 ondo impurity systems using the large-N Schwinger-Keldysh approach. We obs
 erve the prethermalization in these systems\, in which the effective tempe
 ratures between the impurity spin and the composite boson are different. L
 astly\, we show that by using the SU(1\,1) algebra\, we can define non-equ
 ilibrium phases in terms of entanglement properties. We provide examples s
 uch as Bose-Einstein Condensate (BEC) quench dynamics and periodically dri
 ven quantum oscillators. 
LOCATION:TCM Seminar Room
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