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SUMMARY:Transient Fluid Dynamics of a Strongly Coupled N = 4 SYM Plasma
DTSTART;VALUE=DATE-TIME:20120816T200000Z
DTEND;VALUE=DATE-TIME:20120816T220000Z
DTSTAMP;VALUE=DATE-TIME:20210117T010520Z
UID:indico-contribution-308625@indico.cern.ch
DESCRIPTION:Speakers: Jorge Noronha (U)\nWe argue\, using the AdS/CFT corr
espondence\, that the transient\ndynamics of the shear stress tensor in a
strongly coupled N = 4 SYM\nplasma is not described by relaxation-type\, f
luid dynamical equations:\nat long times the equations of motion should co
ntain a second-order\ncomoving derivative of the shear stress tensor. This
occurs because in\nthis strongly-coupled system the lowest “non-hydrody
namical”\nquasinormal modes associated with shear stress possess a nonze
ro real\npart at zero wavenumber. We use Weyl invariance to obtain the mos
t\ngeneral equations of motion containing 2 comoving derivatives of the\ns
hear stress tensor that are compatible with the symmetries. We show\nthat
the asymptotic solution of this theory valid at times much larger\nthan th
e timescale associated with the “non-hydrodynamical” modes\nreproduces
the well-known results previously obtained directly from\nthe AdS/CFT cor
respondence. If the QGP formed in heavy ion collisions\ncan be at least qu
alitatively understood in terms of strongly-coupled\nN = 4 SYM theory\, th
e second time derivative present in the equations\nof motion of the fluid
may lead to an unexpected dependence on the\ninitial conditions for the sh
ear stress tensor needed in numerical\nhydrodynamic simulations.\n\nhttps:
//indico.cern.ch/event/181055/contributions/308625/
LOCATION: Regency 1/3 and Ambassador
URL:https://indico.cern.ch/event/181055/contributions/308625/
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