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SUMMARY:Umut Gürsoy (University of Utrecht)
DTSTART:20200616T140000Z
DTEND:20200616T150000Z
DTSTAMP:20260423T023048Z
UID:HoloTube/10
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/HoloTube/10/
 ">Holography of the spin current</a>\nby Umut Gürsoy (University of Utrec
 ht) as part of HoloTube: Applied holography webinars\n\n\nAbstract\nRecent
  developments both in high and low energy physics have increased the impor
 tance of hydrodynamics of matter with correlated spin degrees of freedom. 
 In particular\, Takahashi et al managed to create stable spin currents in 
 liquid metals sourced by vorticity\, and the STAR collaboration at RHIC ob
 served nontrivial polarization of hyperon particles in off-central heavy i
 on collisions. Theoretical understanding of these findings requires adding
  the spin current to (relativistic) hydrodynamics as a new degree of freed
 om. In this talk — that will be based on arXiv:2004.05148  — I will de
 scribe how this can be done by sourcing the spin current by torsion. I wil
 l classify different types of torsion in 3+1 dimensions and develop the co
 rresponding constitutive equations for the energy-momentum tensor and the 
 spin current. We will then analyze the problem in a toy holographic model 
 based on the 5D Lovelock-Chern-Simons theory. As a byproduct\, I will intr
 oduce a number of  previously unknown blackhole solutions to this theory a
 nd map these solutions to hydrodynamics by the fluid-gravity correspondenc
 e. The resulting energy-momentum and spin flow exhibits interesting featur
 es including a dynamical version of the Barnett effect and indicate variou
 s novel mechanisms through which spin currents may be generated in strongl
 y correlated systems.\n
LOCATION:https://researchseminars.org/talk/HoloTube/10/
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