Journal of High Energy Physics

, 2019:232 | Cite as

Information flows in strongly coupled ABJM theory

  • Vijay Balasubramanian
  • Niko JokelaEmail author
  • Arttu Pönni
  • Alfonso V. Ramallo
Open Access
Regular Article - Theoretical Physics


We use holographic methods to characterize the RG flow of quantum information in a Chern-Simons theory coupled to massive fermions. First, we use entanglement entropy and mutual information between strips to derive the dimension of the RG-driving operator and a monotonic c-function. We then display a scaling regime where, unlike in a CFT, the mutual information between strips changes non-monotonically with strip width, vanishing in both IR and UV but rising to a maximum at intermediate scales. The associated information transitions also contribute to non-monotonicity in the conditional mutual information which characterizes the independence of neighboring strips after conditioning on a third. Finally, we construct a measure of extensivity which tests to what extent information that region A shares with regions B and C is additive. In general, mutual information is super-extensive in holographic theories, and we might expect super-extensivity to be maximized in CFTs since they are scale-free. Surprisingly, our massive theory is more super-extensive than a CFT in a range of scales near the UV limit, although it is less super-extensive than a CFT at all lower scales. Our analysis requires the full ten-dimensional dual gravity background, and the extremal surfaces computing entanglement entropy explore all of these dimensions.


AdS-CFT Correspondence D-branes 


Open Access

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Copyright information

© The Author(s) 2019

Authors and Affiliations

  1. 1.David Rittenhouse LaboratoryUniversity of PennsylvaniaPhiladelphiaU.S.A.
  2. 2.Theoretische Natuurkunde, Vrije Universiteit Brussel and International Solvay InstitutesBrusselsBelgium
  3. 3.Department of PhysicsUniversity of HelsinkiHelsinkiFinland
  4. 4.Helsinki Institute of PhysicsUniversity of HelsinkiHelsinkiFinland
  5. 5.Departamento de Física de PartículasUniversidade de Santiago de CompostelaSantiago de CompostelaSpain
  6. 6.Instituto Galego de Física de Altas EnerxíasUniversidade de Santiago de CompostelaSantiago de CompostelaSpain

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