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Spectral weight and spatially modulated instabilities in holographic superfluids
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stanford University, United States .
2017 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 5, 005Article in journal (Refereed) Published
Abstract [en]

Free fermions form a Fermi surface, which results in non-zero spectral weight at low energy and finite wavevector k(F). In this work, we find similar features in holographic phases dual to strongly coupled quantum superfluid matter. At zero temperature, the phases we consider exhibit semi-local criticality in the IR and all the charge is carried by the scalar condensate outside the black hole horizon. Depending on the value taken by the IR critical exponents, we find Fermi surfaces in the transverse sector, Fermi shells in the longitudinal sector or no spectral weight at all. When there is non-zero transverse spectral weight, the IR can be subject to an instability at finite wavevector, the endpoint of which is likely a spatially modulated phase.

Place, publisher, year, edition, pages
Springer, 2017. no 5, 005
Keyword [en]
Holography and condensed matter physics (AdS/CMT), AdS-CFT Correspondence
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-208828DOI: 10.1007/JHEP05(2017)005ISI: 000401072300001ScopusID: 2-s2.0-85018399803OAI: oai:DiVA.org:kth-208828DiVA: diva2:1108773
Note

QC 20170613

Available from: 2017-06-13 Created: 2017-06-13 Last updated: 2017-06-13Bibliographically approved

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