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SUMMARY:Acoustics of a simple holographic model with momentum relaxation -
  Shahar Hadar (DAMTP)
DTSTART:20160429T120000Z
DTEND:20160429T130000Z
UID:TALK65464@talks.cam.ac.uk
CONTACT:43345
DESCRIPTION:The linear axion model\, proposed by Andrade and Withers\, is 
 the simplest extant holographic model of transport with momentum relaxatio
 n in a strongly coupled field theory without quasiparticles. On the gravit
 y side it is an asymptotically Anti-de Sitter black brane solution of Gene
 ral Relativity with additional matter fields which have a nonzero profile 
 at equilibrium. We develop a gauge-invariant formalism for studying the pe
 rturbations of this solution and compute its quasinormal modes. We find st
 rong evidence for the model's stability and find an interesting critical b
 ehaviour of a certain family of modes. For a special value of the paramete
 rs the symmetry is enhanced\, allowing an analytical computation of the fu
 ll quasinormal spectrum. 
LOCATION:Pavilion B Potter Room (B1.19)
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