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SUMMARY:Particle Production\, Equilibration\, and Quantum Recurrences from
  Classical Fields
DTSTART:20260831T113000Z
DTEND:20260831T133000Z
DTSTAMP:20260915T205900Z
UID:indico-event-1721224@indico.cern.ch
DESCRIPTION:Speakers: Iván Cuntín Broullón (IGFAE)\n\nWe investigate pa
 rticle production from classical fields\, a phenomenon central to the pre-
 equilibrium dynamics of relativistic heavy-ion collisions and the reheatin
 g epoch of the early Universe. Using lattice phi-4 theory as a proof of pr
 inciple\, we show that this problem is naturally amenable to quantum compu
 tation\, providing a first-principles framework for nonequilibrium quantum
 -field dynamics beyond existing approximations. We perform simulations on 
 small spatial lattices\, exhausting our available classical computational 
 resources while maintaining a direct mapping to future quantum-computing i
 mplementations. We find that particle production is accompanied by equilib
 ration of observables\, including the field expectation value\, occupation
 -number distribution\, and pressure. The observed equilibration persists f
 or timescales several times longer than the initial equilibration time bef
 ore the observables resume oscillatory behavior associated with quantum Po
 incaré recurrences. Our results establish a route toward first-principles
  studies of equilibration in nonequilibrium quantum field theory and provi
 de insight into the search for the smallest possible locally equilibrated 
 quark-gluon systems at hadron colliders.\n\nhttps://indico.cern.ch/event/1
 721224/
LOCATION:4/2-037 - TH meeting room (CERN)
URL:https://indico.cern.ch/event/1721224/
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