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SUMMARY:Viscosity in an accelerated relativistic medium from the Unruh eff
 ect vs string theory bound
DTSTART;VALUE=DATE-TIME:20241025T143000Z
DTEND;VALUE=DATE-TIME:20241025T144500Z
DTSTAMP;VALUE=DATE-TIME:20260916T191024Z
UID:indico-contribution-4164@cern.ch
DESCRIPTION:Speakers: Dmitriy Lapygin (Southern federal university)\nThis 
 project investigates the dissipative properties of an accelerated relativi
 stic medium and their connection to the Unruh effect and effective black h
 ole radiation. The thermodynamic properties in spaces with a horizon is on
 e of the most discussed in modern fundamental physics. A notable 2005 stri
 ng theory limit sets a minimum shear viscosity. We calculated viscosity in
  an accelerated frame for a photon medium\, where no holographic descripti
 on exists\, treating the black hole horizon as a membrane of finite thickn
 ess. While the average viscosity\nmeets the string theory limit\, local va
 lues are described by a universal function that is independent of particle
  spin. Specifically\, on the membrane surface\, the ratio of local viscosi
 ty to local entropy is half the string theory limit. Importantly\, this re
 sult is gauge-independent\, with the positive contribution from gauge fixi
 ng exactly canceling the negative contribution from Faddeev-Popov ghosts.\
 n\nhttps://indico.particle.mephi.ru/event/436/contributions/4164/
LOCATION: Moskvorechye 1
URL:https://indico.particle.mephi.ru/event/436/contributions/4164/
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