A magnetically induced quantum critical point in holography
Abstract
Here, we investigate quantum critical points in a 2+1 dimensional gauge theory at finite chemical potential χ and magnetic field B. The gravity dual is based on 4D N = 2 FayetIliopoulos gauged supergravity and the solutions we consider — that are constructed analytically — are extremal, dyonic, asymptotically AdS_{4} blackbranes with a nontrivial radial profile for the scalar field. We discover a line of second order fixed points at B = B _{c}(χ) between the dyonic black brane and an extremal “thermal gas” solution with a singularity of goodtype, according to the acceptability criteria of Gubser. The dual field theory is a strongly coupled nonconformal field theory at finite charge and magnetic field, related to the ABJM theory deformed by a triple trace operator Φ ^{3}. This line of fixed points might be useful in studying the various strongly interacting quantum critical phenomena such as the ones proposed to underlie the cuprate superconductors. We also find curious similarities between the behaviour of the VeV under B and that of the quark condensate in 2+1 dimensional NJL models.
 Authors:
 KU Leuven, Leuven (Belgium)
 Utrecht Univ., Utrecht (The Netherlands)
 Columbia Univ., New York, NY (United States)
 Publication Date:
 Research Org.:
 Columbia Univ., New York, NY (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), High Energy Physics (HEP) (SC25)
 OSTI Identifier:
 1360129
 Grant/Contract Number:
 SC0011941
 Resource Type:
 Journal Article: Accepted Manuscript
 Journal Name:
 Journal of High Energy Physics (Online)
 Additional Journal Information:
 Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 9; Journal ID: ISSN 10298479
 Publisher:
 Springer Berlin
 Country of Publication:
 United States
 Language:
 English
 Subject:
 74 ATOMIC AND MOLECULAR PHYSICS; AdSCFT correspondence; black holes in string theory; gaugegravity correspondence; holography and condensed matter physics (AdS/CMT)
Citation Formats
Gnecchi, A., Gursoy, U., Papadoulaki, O., and Toldo, C. A magnetically induced quantum critical point in holography. United States: N. p., 2016.
Web. doi:10.1007/JHEP09(2016)090.
Gnecchi, A., Gursoy, U., Papadoulaki, O., & Toldo, C. A magnetically induced quantum critical point in holography. United States. doi:10.1007/JHEP09(2016)090.
Gnecchi, A., Gursoy, U., Papadoulaki, O., and Toldo, C. 2016.
"A magnetically induced quantum critical point in holography". United States.
doi:10.1007/JHEP09(2016)090. https://www.osti.gov/servlets/purl/1360129.
@article{osti_1360129,
title = {A magnetically induced quantum critical point in holography},
author = {Gnecchi, A. and Gursoy, U. and Papadoulaki, O. and Toldo, C.},
abstractNote = {Here, we investigate quantum critical points in a 2+1 dimensional gauge theory at finite chemical potential χ and magnetic field B. The gravity dual is based on 4D N = 2 FayetIliopoulos gauged supergravity and the solutions we consider — that are constructed analytically — are extremal, dyonic, asymptotically AdS4 blackbranes with a nontrivial radial profile for the scalar field. We discover a line of second order fixed points at B = Bc(χ) between the dyonic black brane and an extremal “thermal gas” solution with a singularity of goodtype, according to the acceptability criteria of Gubser. The dual field theory is a strongly coupled nonconformal field theory at finite charge and magnetic field, related to the ABJM theory deformed by a triple trace operator Φ3. This line of fixed points might be useful in studying the various strongly interacting quantum critical phenomena such as the ones proposed to underlie the cuprate superconductors. We also find curious similarities between the behaviour of the VeV under B and that of the quark condensate in 2+1 dimensional NJL models.},
doi = {10.1007/JHEP09(2016)090},
journal = {Journal of High Energy Physics (Online)},
number = 9,
volume = 2016,
place = {United States},
year = 2016,
month = 9
}
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