Electromagnetic signatures of a strongly coupled anisotropic plasma
arXiv:1106.3539 · doi:10.1007/JHEP08(2011)153
Abstract
In heavy-ion collisions, quark-gluon plasma is likely to be produced with sizable initial pressure anisotropy, which may leave an imprint on electromagnetic observables. In order to model a strongly coupled anisotropic plasma, we use the AdS/CFT correspondence to calculate the current-current correlator of a weakly gauged U(1) subgroup of R symmetry in an N=4 super-Yang-Mills plasma with a (temporarily) fixed anisotropy. The dual geometry, obtained previously by Janik and Witaszczyk, contains a naked singularity which however permits purely infalling boundary conditions and therefore the usual definition of a retarded correlator. We obtain numerical results for the cases of wave vector parallel and orthogonal to the direction of anisotropy, and we compare with previous isotropic results. In the (unphysical) limit of vanishing frequency (infinite time) we obtain a vanishing DC conductivity for any amount of anisotropy, but the anisotropic AC conductivities smoothly approach the isotropic case in the limit of high frequencies. We also discuss hard photon production from an anisotropic plasma and compare with existing hard-loop resummed calculations.
23 pages, 15 figures. v3: improved figures 1 and 3
References in corpus (16)
- Minkowski-space correlators in AdS/CFT correspondence: recipe and applications
- Horizon formation and far-from-equilibrium isotropization in supersymmetric Yang-Mills plasma
- Holography and colliding gravitational shock waves in asymptotically AdS_5 spacetime
- Dissipative Dynamics of Highly Anisotropic Systems
- Photon and dilepton production in supersymmetric Yang-Mills plasma
- Thermodynamics and Instabilities of a Strongly Coupled Anisotropic Plasma
- On String Theory Duals of Lifshitz-like Fixed Points
- Non-boost-invariant anisotropic dynamics
- Plasma Instabilities in an Anisotropically Expanding Geometry
- Non-abelian plasma instabilities for strong anisotropy
- Photoemission with Chemical Potential from QCD Gravity Dual
- Measuring Quark-Gluon-Plasma Thermalization Time with Dileptons
- Bright branes for strongly coupled plasmas
- Towards the description of anisotropic plasma at strong coupling
- Suppression of forward dilepton production from an anisotropic quark-gluon plasma
- Photon polarization as a probe for quark-gluon plasma dynamics
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- Thermal photon production in a strongly coupled anisotropic plasma
- Anisotropic hydrodynamics, holography and the chiral magnetic effect
- Probing Two Holographic Models of Strongly Coupled Anisotropic Plasma
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- Brighter Branes, enhancement of photon production by strong magnetic fields in the gauge/gravity correspondence
- Thermodynamics and phase diagram of anisotropic Chern-Simons deformed gauge theories
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