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SUMMARY:Quarkonium as Quantum Probe of the QGP in the Open Quantum System 
 Framework
DTSTART:20260604T080000Z
DTEND:20260604T100000Z
DTSTAMP:20260701T001900Z
UID:indico-event-1677000@indico.cern.ch
DESCRIPTION:Speakers: Tom Magorsch (TU Munich)\, Tom Magorsch\n\nIn this t
 alk\, I discuss heavy quarkonium as a quantum probe of the QGP within the 
 open quantum system framework. After briefly introducing the formalism\, I
  demonstrate how higher-order terms in an expansion of the binding energy 
 over the temperature enable thermalization of the bottomonium. Motivated b
 y this\, I show an extension of the formalism that avoids the $E/T$ expans
 ion and briefly introduce a novel simulation framework to perform scalable
  calculations in this setting. Notably\, without the $E/T$ expansion\, bot
 tomonium dynamics depend on the full chromoelectric spectral function inst
 ead of a finite set of transport coefficients characterizing the QGP. Fina
 lly\, I discuss the role of the quantum nature of bottomonium in its dynam
 ics. By calculating the time evolution of the negativity in Wigner space\,
  assess the evolution of quantum features and study their relevance to the
  survival probability of bottomonium. I show that the $\\Upsilon(1S)$ is l
 argely insensitive to the negative regions in the phase space\, while the 
 $\\Upsilon(2S)$ and  $\\Upsilon(3S)$ show a large sensitivity. Finally\, 
 I show that partial classicalization is driven by a conditional purificati
 on of the bottomonium ensemble\, resulting from the dipole interaction pre
 dominantly dissolving weakly bound bottomonium modes.\n\nhttps://indico.ce
 rn.ch/event/1677000/
LOCATION:4/2-037 - TH meeting room (CERN)
URL:https://indico.cern.ch/event/1677000/
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