Noncommutative AdS black hole and the IR holographic superconductor
We construct a noncommutative (NC) AdS$_4$-charged black hole with a planar horizon topology. The NC effects of this geometry are captured by a Gaussian distribution of black hole mass codified in a dust-like energy-momentum tensor. A natural bound in radial coordinate is established, below which th...
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Zusammenfassung: | We construct a noncommutative (NC) AdS$_4$-charged black hole with a planar
horizon topology. The NC effects of this geometry are captured by a Gaussian
distribution of black hole mass codified in a dust-like energy-momentum tensor.
A natural bound in radial coordinate is established, below which the scalar
curvature changes its sign and defines a NC cutoff that embeds the point
singularity. We study in detail the thermodynamic structure of this scenario,
finding a well-defined black hole mass and an analytic criterion for its
stability. Focusing on the AdS$_{2}$ structure near the horizon, we find a
novel effective curvature radius with dependency on the NC cutoff. These
results motivate us to explore the holographic superconducting system in terms
of the nearness from the cutoff. The behavior of the magnetic field in the deep
IR geometry is studied and we found semi-analytical novel expressions for the
upper critical magnetic fields of a dual type-II superconductor in the
canonical and grand canonical ensembles. The condensation in the form of hair
is studied in terms of the bound states of the associated Schr\"odinger
potential of the scalar field, interpreted as the dual to the density of Cooper
pairs. The NC effects increase the hair formation due to a steeper AdS$_2$
throat comparable to the commutative case. Finally, we obtain the effective IR
scalar field equation on the near horizon and near extremal NC Schwarzschild
AdS$_2$ geometry and confirm that NC effects promote bound states that the
commutative version forbids. |
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DOI: | 10.48550/arxiv.2411.05259 |