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Islands for Entanglement Negativity

by Jaydeep Kumar Basak, Debarshi Basu, Vinay Malvimat, Himanshu Parihar and Gautam Sengupta

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Submission summary

Authors (as registered SciPost users): Jaydeep Kumar Basak · Debarshi Basu · Vinay Malvimat · Himanshu Parihar
Submission information
Preprint Link: scipost_202107_00024v2  (pdf)
Date accepted: 2021-10-29
Date submitted: 2021-10-09 09:09
Submitted by: Malvimat, Vinay
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
  • High-Energy Physics - Theory
Approach: Theoretical


We advance two alternative proposals for the island contributions to the entanglement negativity of various pure and mixed state configurations in quantum field theories coupled to semiclassical gravity. The first construction involves the extremization of an algebraic sum of the generalized Renyi entropies of order half. The second proposal involves the extremization of the sum of the effective entanglement negativity of quantum matter fields and the backreacted area of a cosmic brane spanning the entanglement wedge cross section which also extremizes the generalized Renyi reflected entropy of order half. These proposals are utilized to obtain the island contributions to the entanglement negativity of various pure and mixed state configurations involving the bath systems coupled to extremal and non-extremal black holes in JT gravity demonstrating an exact match with each other. Furthermore, the results from both the proposals match precisely with the island contribution to half the Renyi reflected entropy of order half providing a strong consistency check. We then allude to a possible doubly holographic picture of our island proposals and provide a derivation of the first proposal by determining the corresponding replica wormhole contributions.

Published as SciPost Phys. 12, 003 (2022)

Author comments upon resubmission

We have examined the reports of the two referees for our submission scipost$\_202107\_00024$ entitled ``Islands for Entanglement Negativity". Note that the first referee has not requested any changes however has a few remarks to which we have responded in the corresponding author reply section. The second referee has requested two changes which have been incorporated in the revised version of the manuscript and are listed in the corresponding author reply section.

List of changes

We have provided the complete list of changes made in the authors' response section.

Reports on this Submission

Anonymous Report 1 on 2021-10-11 (Invited Report)


The authors have addressed the previous concerns and the manuscript can now be published.

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Anonymous on 2021-10-24  [id 1873]

As a referee I am satisfied and am of the opinion the manuscript is ready for publication.