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Quantum entanglement of localized excited states at finite temperature
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Kyoto University, Kyoto, Japan .
2015 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 1Article in journal (Refereed) Published
Abstract [en]

In this work we study the time evolutions of (Renyi) entanglement entropy of locally excited states in two dimensional conformal field theories (CFTs) at finite temperature. We consider excited states created by acting with local operators on thermal states and give both field theoretic and holographic calculations. In free field CFTs, we find that the growth of Renyi entanglement entropy at finite temperature is reduced compared to the zero temperature result by a small quantity proportional to the width of the localized excitations. On the other hand, in finite temperature CFTs with classical gravity duals, we find that the entanglement entropy approaches a characteristic value at late time. This behaviour does not occur at zero temperature. We also study the mutual information between the two CFTs in the thermofield double (TFD) formulation and give physical interpretations of our results.

Place, publisher, year, edition, pages
2015. no 1
Keyword [en]
AdS-CFT Correspondence, Black Holes, Conformal Field Models in String Theory, Holography and condensed matter physics (AdS/CMT)
National Category
Fusion, Plasma and Space Physics
URN: urn:nbn:se:kth:diva-161978DOI: 10.1007/JHEP01(2015)102ISI: 000349612200003ScopusID: 2-s2.0-84921329949OAI: diva2:800554
Swedish Research Council, 2013-4329

QC 20150407

Available from: 2015-04-07 Created: 2015-03-20 Last updated: 2015-04-07Bibliographically approved

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Caputa, Pawet
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