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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik
MP 8: AdS/CFT II
MP 8.3: Vortrag
Mittwoch, 15. März 2017, 10:15–10:35, SFG 2010
Holographic quenches and anomalous transport — Martin Ammon1, •Sebastian Grieninger1, Amadeo Jiménez-Alba1, Rodrigo P. Macedo1, and Luis Melgar2 — 1Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany — 2Blackett Laboratory, Imperial College London, SW7 2AZ, U.K.
We study the response of the chiral magnetic effect due to continuous quenches induced by time dependent electric fields within holography. Holography is a novel tool to study strongly coupled field theories, i. e. their non equilibrium properties. Concretely, we consider a holographic model with dual chiral anomaly and compute the electric current parallel to a constant, homogeneous magnetic field and a time dependent electric field in the probe approximation. We explicitly solve the PDEs by means of pseudospectral methods in spatial and time directions and study the transition to an universal “fast” quench response. We highlight the existence of Landau level resonances in the electrical conductivity parallel to a magnetic field at finite frequency and show explicitly that these only appear in presence of the anomaly. We show that the existence of these resonances induces, among others, a long-lived AC electric current once the electric field is switched off.