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Résumé |
n this talk, I will summarize recent progress in the description of thermoelectric transport using gauge/gravity
duality. I will first review thermoelectric transport in hydrodynamics, where momentum conservation implies
infinite zero frequency conductivities. By a change of basis of the conserved currents, a universal, finite
conductivity can be extracted. It can be computed holographically. I will discuss its low-temperature scaling
in terms of critical exponents characterizing time and space anisotropy and anomalous dimensions for the
free energy and conserved current. When momentum is almost conserved, the zero-frequency delta
functions broaden into Drude-like peaks. A holographic computation precisely identifies the redistribution of
the low-frequency spectral weight between two contributions originating from the non-conservation of
momentum and intrinsic dissipation respectively. |
