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Intermediate scalings in holographic RG flows and conductivities
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stockholm University, Sweden; Stanford University, United States; Université Paris 7, France.
2015 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 2, 035Article in journal (Refereed) Published
Abstract [en]

We construct numerically finite density domain-wall solutions which interpolate between two AdS(4) fixed points and exhibit an intermediate regime of hyperscaling violation, with or without Lifshitz scaling. Such RG flows can be realized in gravitational models containing a dilatonic scalar and a massive vector field with appropriate choices of the scalar potential and couplings. The infrared AdS(4) fixed point describes a new ground state for strongly coupled quantum systems realizing such scalings, thus avoiding the well-known extensive zero temperature entropy associated with AdS(2) x R-2. We also examine the zero temperature behavior of the optical conductivity in these backgrounds and identify two scaling regimes before the UV CFT scaling is reached. The scaling of the conductivity is controlled by the emergent IR conformal symmetry at very low frequencies, and by the intermediate scaling regime at higher frequencies.

Place, publisher, year, edition, pages
2015. no 2, 035
Keyword [en]
Holography and condensed matter physics (AdS/CMT), AdS-CFT Correspondence
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-161609DOI: 10.1007/JHEP02(2015)035ISI: 000349286900001Scopus ID: 2-s2.0-84922363841OAI: oai:DiVA.org:kth-161609DiVA: diva2:797931
Note

QC 20150325

Available from: 2015-03-25 Created: 2015-03-13 Last updated: 2017-12-04Bibliographically approved

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