Non-mean-field quantum critical points from holography
Evans, Nick, Jensen, Kristan and Kim, Keun-Young (2010) Non-mean-field quantum critical points from holography. Physical Review D, 82, (10), 105012-[15pp]. (doi:10.1103/PhysRevD.82.105012).
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We construct a class of quantum critical points with non-mean-field critical exponents via holography. Our approach is phenomenological. Beginning with the D3/D5 system at nonzero density and magnetic field which has a chiral phase transition, we simulate the addition of a third control parameter. We then identify a line of quantum critical points in the phase diagram of this theory, provided that the simulated control parameter has dimension less than two. This line smoothly interpolates between a second-order transition with mean-field exponents at zero magnetic field to a holographic Berezinskii-Kosterlitz-Thouless transition at larger magnetic fields. The critical exponents of these transitions only depend upon the parameters of an emergent infrared theory. Moreover, the non-mean-field scaling is destroyed at any nonzero temperature. We discuss how generic these transitions are.
|Subjects:||Q Science > QC Physics|
|Divisions:||Faculty of Physical and Applied Science > Physics and Astronomy
|Date Deposited:||24 Apr 2012 10:27|
|Last Modified:||26 Apr 2013 05:44|
|Contributors:||Evans, Nick (Author)
Jensen, Kristan (Author)
Kim, Keun-Young (Author)
|Date:||15 November 2010|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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