Oxford Holography Group

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• Oxford micro-workshop on analytic properties of thermal correlators - March 2017
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Holography Seminar

Time and place: Tue 2-4 pm, Seminar Room 501, DWB (additional seminars and non-standard time are listed in bold)

Trinity Term 2014 Talks:

• 29/04/2014: Martin Ammon (U. Jena): Seminar canelled
• 06/05/2014: Matthew Lippert (U. Amsterdam): Holographic Anyonic Superfluidity
  Material: Paper I, Paper II, Slides
  Abstract: This talk will be about an unusual type of superfluid, one made up of anyons. I will discuss anyons, their relation to the quantum Hall effect, and how an anyonic superfluid is unlike a typical superfluid. Then I will describe a holographic model of a strongly-coupled anyonic superfluid and the stability of its supercurrents.
• 08/05/2014, 4:15pm, Sciama Lecture Theatre (Particle and Fields Seminar): Jorge Casalderrey Solana (University of Barcelona): Gauge/String Duality, Hot QCD and Heavy Ion Collisions
  Material: Paper
• 12/05/2014, 5.30-7.30pm, 501 DWB: Richard Davison (U. Leiden): Linear Resistivity from Hydrodynamics
  Material: Paper, Slides
  Abstract: I will describe a simple physical mechanism whereby a strongly interacting metallic state, through weak interactions with random disorder, acquires an electrical resistivity which is proportional to its entropy. This is a phenomenologically attractive feature as both of these quantities are linear in temperature in the strange metal phase of the cuprates. The key assumption is that, unlike in a Fermi liquid, strong interactions cause the quick formation of a collective, hydrodynamic state with a minimal viscosity.
• 13/05/2014, 4.30-6.30pm: Larry Yaffe (U.Washington, Seattle): Numerical holography and colliding shocks
  Material: Paper, Slides
  Abstract: Gauge/gravity duality maps problems involving non-equilibrium dynamics in certain strongly coupled quantum field theories into gravitational initial value problems in asymptotically anti-de Sitter spacetimes. Effective numerical techniques for solving the resulting gravitational infall problems will be described. Results obtained for colliding gravitational shocks, mimicking aspects of heavy ion collisions, will be discussed.
• 20/05/2014: No Seminar
• 26/05/2014, 5-7pm, 501 DWB: Andrej Ficnar (Columbia U.): Finite Endpoint Momentum Strings and Applications to Energy Loss
  Material: Paper I, Paper II, Slides
  Abstract: I will argue that classical strings, both bosonic and supersymmetric, can have finite energy and momentum at their endpoints and show that, in a general curved background, the string endpoints must propagate along null geodesics as long as their energy remains finite. In the AdS/CFT context, the finite endpoint momentum construction suggests a clear definition of the instantaneous rate of energy loss and leads to greater stopping distances for light quarks than it has been possible for classical solutions considered previously. We will also develop a scheme for determining the light quark jet energy loss, use it to compute the nuclear modification factor RAA and compare it to the most recent results from the heavy ion program at RHIC and LHC.
• 27/05/2014: Joan Camps (DAMPT Cambridge): Generalized Entropy and Higher Derivative Gravity
  Material: Paper, Slides
  Abstract: I will discuss the Maldacena-Lewkowycz derivation of the Ryu-Takayangi prescrition for holographic entanglement entropy, and extend it to a more general class of theories of gravity in the bulk. This analysis results in a new euclidean entropy functional, that generalises Wald's entropy. In the lorentzian, this functional is a natural extension of Wald's black hole entropy to time dependent situations.
• 29/05/2014, 2-4pm, 501 DWB: Umut Gursoy (U. Utrecht): Magnetically Induced Currents in the Quark-Gluon Plasma
  Material: Slides
  Abstract: The hot QCD matter produced in any heavy ion collision with a nonzero impact parameter is produced within a strong magnetic field. The magnetic field is time-dependent and the medium is expanding. In this talk I will describe two types of electric currents produced as a result of this magnetic field: 1. Chiral magnetic current in the presence of topologically non-trivial vacuum. 2. Induction of charged currents due to the combination of Faraday and Hall effects.
• 03/06/2014: No Seminar
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• 10/06/2014: No Seminar
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• 17/06/2014: No Seminar
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If you are interested in presenting your research in Oxford, please contact Jonas Probst.

For a list of past talks follow this link.

The following might also be of interest:

• A weekly updated list of talks related to string theory.
• A list of all seminars in the Physics Department, including the Theoretical Physics Colloquium and the Particles and Fields Seminar.