Bremen 2017 – wissenschaftliches Programm

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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 8: AdS/CFT II

MP 8.2: Vortrag

Mittwoch, 15. März 2017, 09:55–10:15, SFG 2010

Phase diagrams of holographic superfluids at finite superfluid velocity — Martin Ammon and •Markus Gardemann — Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany

The AdS/CFT correspondence is a novel approach to strongly coupled field theories. With this tool we examine the phase diagram of a particular superfluid at finite superfluid velocity. In particular we study the Goldstone modes arising due to spontaneous symmetry breaking. Within the model the sound velocity becomes negative for large enough superfluid velocity signalling an instability. Since the instability is strongest at finite wavelength, this indicates the existence of an inhomogeneous or striped condensed phase for large superfluid velocity. We explicitly construct the striped phase and extract some of the thermodynamic properties.