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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 543713.0, MPI für Physik / MPI für Physik
Holographic Flavor Transport in Schroedinger Spacetime
Authors:Ammon, Martin; Hoyos, Carlos; O'Bannon, Andy; Wu, Jackson M. S.
Date of Publication (YYYY-MM-DD):2010
Title of Journal:Journal of High Energy Physics
Journal Abbrev.:JHEP
Issue / Number:1006
Start Page:012
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:We use gauge-gravity duality to study the transport properties of a finite density of charge carriers in a strongly-coupled theory with non-relativistic symmetry. The field theory is N=4 supersymmetric SU(Nc) Yang-Mills theory in the limit of large Nc and with large 't Hooft coupling, deformed by an irrelevant operator, coupled to a number Nf of massive N=2 supersymmetric hypermultiplets in the fundamental representation of the gauge group, i.e. flavor fields. The irrelevant deformation breaks the relativistic conformal group down to the Schroedinger group, which has non-relativistic scale invariance with dynamical exponent z=2. Introducing a finite baryon number density of the flavor fields provides us with charge carriers. We compute the associated DC and AC conductivities using the dual gravitational description of probe D7-branes in an asymptotically Schroedinger spacetime. We generically find that in the infrared the conductivity exhibits scaling with temperature or frequency that is relativistic, while in the ultraviolet the scalings appear to be non-relativistic with dynamical exponent z=2, as expected in the presence of the irrelevant deformation.
Classification / Thesaurus:Theoretical Physics
Comment of the Author/Creator:32 pages; v2 minor corrections, added three references, version published in JHEP
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2010-37
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/arxiv:1003.5913
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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