Gauge/gravity duality and near-equilibrium regime of strongly coupled thermal gauge theories

Lead Research Organisation: University of Oxford
Department Name: Oxford Physics

Abstract

The focus of the proposed research is the intriguing connection between the physics of black holes and the properties of finite temperature gauge theories (gauge theories are the class of theories describing strong, weak and electromagnetic forces). This connection is known as the holographic gauge/gravity duality. The duality can be used as a tool to access the so called nonperturbative regime of gauge theories where other available theoretical methods are not effective. This is especially important for processes involving hot and dense nuclear matter out of thermal equilibrium i.e. precisely the conditions created in heavy ion collision experiments currently underway at the Relativistic Heavy Ion Collider (RHIC). Experimental data strongly suggests that the matter in these collisions exists in the regime described by a nonperturbative gauge theory. In the absence of other viable approaches, the gauge/gravity duality remains the only source of theoretical insights in this field. Computing transport coefficients such as shear and bulk viscosity, thermal conductivity, diffusion constants in various models using gravity dual description of gauge theories is of great interest for phenomenological applications. Other non-equlibrium processes such as particle emission from the expanding quark-gluon plasma fireball can be treated in this approach as well. The proposed reasearch is supposed to accumulate theoretical information relevant for the analysis of currently available and future experimental data from RHIC and (in the near future) from the heavy ion experiments at the Large Hadron Collider at CERN.

Publications

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Grozdanov S (2015) On the universal identity in second order hydrodynamics in Journal of High Energy Physics

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Grozdanov S (2015) Zero-viscosity limit in a holographic Gauss-Bonnet liquid in Theoretical and Mathematical Physics

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Davison Richard A. (2012) Holographic zero sound at finite temperature in PHYSICAL REVIEW D

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Karch A (2009) Holographic quantum liquid. in Physical review letters

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Starinets A (2009) Quasinormal spectrum and the black hole membrane paradigm in Physics Letters B

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Berti E (2009) Quasinormal modes of black holes and black branes in Classical and Quantum Gravity

 
Description A new formalism to treat higher order fluid dynamics has been developed.
Exploitation Route The formalism can be used to construct the full description of fluid dynamics (within derivative expansion), write down and check the dispersion relation for collective excitations in various substances including quark-gluon plasma and other strongly interacting liquids.
Sectors Education,Other

URL https://inspirehep.net/?ln=en
 
Description Holographic Quantum Liquids 
Organisation University of Washington
Department Department of Physics
Country United States 
Sector Academic/University 
PI Contribution Zero sound mode reminiscent of the collective mode known to exist in liquid Helium-3 has been discovered in a holographic model of quantum liquid.
Collaborator Contribution Joint publication
Impact ``Holographic Quantum Liquid,'' Phys. Rev. Lett. 102, 051602 (2009); ``Zero Sound from Holography,'' [arXiv:0806.3796 [hep-th]].
Start Year 2008
 
Description Quasinormal modes of black holes and black branes 
Organisation CENTRA
Country United States 
Sector Private 
PI Contribution The role of quasinormal modes in the gauge-gravity diality has been described in full detail.
Collaborator Contribution Joint publication
Impact ``Quasinormal modes of black holes and black branes,'' Class. Quant.Grav. 26, 163001 (2009). [arXiv:0905.2975 [gr-qc]].
Start Year 2008
 
Description Quasinormal modes of black holes and black branes 
Organisation California Institute of Technology
Country United States 
Sector Academic/University 
PI Contribution The role of quasinormal modes in the gauge-gravity diality has been described in full detail.
Collaborator Contribution Joint publication
Impact ``Quasinormal modes of black holes and black branes,'' Class. Quant.Grav. 26, 163001 (2009). [arXiv:0905.2975 [gr-qc]].
Start Year 2008
 
Description Second-order hydrodynamics 
Organisation University of Illinois
Department Department of Physics
Country United States 
Sector Academic/University 
PI Contribution Joint publication:Investigation of the second-order (relativistic) hydrodynamics in the context of the AdS/CFT correspondence had a significant impact on the field of heavy-ion physics.
Collaborator Contribution Joint publication
Impact ``Relativistic viscous hydrodynamics, conformal invariance, and holography,'' JHEP 0804, 100 (2008). [arXiv:0712.2451 [hep-th]].
Start Year 2007
 
Description Spectral functions 
Organisation Perimeter Institute for Theoretical Physics
Country Canada 
Sector Academic/University 
PI Contribution Investigation of the spectral functions via gauge-gravity duality
Collaborator Contribution Joint publication
Impact ``Holographic spectral functions and diffusion constants for fundamental matter,'' JHEP 0711, 091 (2007). [arXiv:0706.0162 [hep-th]].
Start Year 2007