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Entanglement and correlations near extremality: CFTs dual to Reissner-Nordström AdS5

Andrade, Tomas; Fischetti, Sebastian; Marolf, Don; Ross, Simon F; Rozali, Moshe

Entanglement and correlations near extremality: CFTs dual to Reissner-Nordström AdS5 Thumbnail


Tomas Andrade

Sebastian Fischetti

Don Marolf

Moshe Rozali


We use the AdS/CFT correspondence to study models of entanglement and correlations between two d = 4 CFTs in thermofield double states at finite chemical potential. Our bulk spacetimes are planar Reissner-Nordström AdS black holes. We compute both thermo-mutual information and the two-point correlators of large-dimension scalar operators, focussing on the small-temperature behavior — an infrared limit with behavior similar to that seen at large times. The interesting feature of this model is of course that the entropy density remains finite as T → 0 while the bulk geometry develops an infinite throat. This leads to a logarithmic divergence in the scale required for non-zero mutual information between equal-sized strips in the two CFTs, though the mutual information between one entire CFT and a finite-sized strip in the other can remain non-zero even at T =0. Furthermore,despitetheinfinitethroat,therecanbeextremallychargedoperators for which the two-point correlations remain finite as T → 0. This suggests an interestingly mixed picture in which some aspects of the entanglement remain localized on scales set by the chemical potential, while others shift to larger and larger scales. We also comment on implications for the localized-quasiparticle picture of entanglement.


Andrade, T., Fischetti, S., Marolf, D., Ross, S. F., & Rozali, M. (2014). Entanglement and correlations near extremality: CFTs dual to Reissner-Nordström AdS5. Journal of High Energy Physics, 2014(4), Article 23.

Journal Article Type Article
Acceptance Date Mar 5, 2014
Online Publication Date Apr 3, 2014
Publication Date Apr 3, 2014
Deposit Date Apr 14, 2014
Publicly Available Date Apr 15, 2014
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2014
Issue 4
Article Number 23


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Copyright Statement
This article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.

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