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DTSTART:20190331T030000
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DTSTAMP:20260312T172843Z
UID:5b4d8fb08706f436610462@ist.ac.at
DTSTART:20190905T160000
DTEND:20190905T180000
DESCRIPTION:Speaker: Spyros Sotiriadis\nhosted by Laszlo Erdös\nAbstract: 
 One of the fundamental principles of relativity is that a physical observa
 ble at any spacetime point is determined only by events within its past li
 ght-cone. In non-equilibrium quantum field theory this is manifested in th
 e way correlations spread through spacetime: starting from an initially sh
 ort-range correlated state\, measurements of two observers at distant spac
 etime points are expected to remain independent until their past light-con
 es overlap. This is usually called the horizon effect. In contrast to this
  typical behaviour we find that when topological excitations are present\,
  correlations develop outside of the horizon even between infinitely dista
 nt points. We demonstrate this effect in the sine-Gordon model\, showing t
 hat it can be attributed to the non-local nature of solitons and interpret
 ed as dynamical generation of entanglement between distant regions of spac
 e. Our results are derived by means of two independent methods: a numerica
 l technique based on Renormalisation Group and Conformal Field Theory and 
 an exact analytical calculation based on Bosonisation\, the simplest examp
 le of Duality in quantum field theory.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:boosthui@ist.ac.at
SUMMARY:Spyros Sotiriadis: Horizon violation and dynamical generation of in
 finite-range correlations after a quantum quench
URL:https://talks-calendar.ista.ac.at/events/2080
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