String Theory seminar - Kazem Bitaghsir Fadafan Seminar

- Time:
- 13:00 - 14:00
- Date:
- 21听狈辞惫别尘产别谤听2017
- Venue:
- 34/4005
For more information regarding this seminar, please email Olga Papadoulaki, Brandon Robinson at o.papadoulaki@soton.ac.uk, b.j.robinson@soton.ac.uk .
Event details
On diffusivities bounds from holography
黑料社 of some quantum systems in condensed matter theory such as strange metals and cold atomic phase need to consider strongly interacting many-body quantum physics. To study such strongly interacting systems, the usual theoretical methods are not e铿僣ient and one should use new methods which are based on the non-perturbative approaches. Using the gauge-string correspondence is a new tool for studying the transport coe铿僣ients in a strongly interacting systems. One of the important observables is the electrical conductivity at 铿乶ite density and disorder. We discuss the proposed bound of the electrical conductivity in strongly coupled disordered quantum 铿乪ld theories using holography. It is interesting that in the incoherent limit, the transport is given by the di铿usion of charge and energy. In this limit, a universal bound for the di铿usivities have been proposed from holography which is related to quantum chaos and butterfly velocity. We consider coupling of the Maxwell term to the bulk Weyl tensor and compute the butter铿倅 velocity, charge and energy di铿usion with broken translational symmetry.
Speaker information
Kazem Bitaghsir Fadafan , Southampton and Institute for Research in Fundamental Sciences (IPM), Iran.