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Evolution of entanglement entropy in orbifold CFTs
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stockholm University, Sweden; Kyoto University, Japan.
2017 (English)In: Journal of Physics A: Mathematical and Theoretical, ISSN 1751-8113, E-ISSN 1751-8121, Vol. 50, no 24, 244001Article in journal (Refereed) Published
Abstract [en]

In this work we study the time evolution of the Renyi entanglement entropy for locally excited states created by twist operators in the cyclic orbifold (T-2)(n)/Z(n) and the symmetric orbifold (T-2)(n)/S-n. We find that when the square of its compactification radius is rational, the second Renyi entropy approaches a universal constant equal to the logarithm of the quantum dimension of the twist operator. On the other hand, in the non-rational case, we find a new scaling law for the Renyi entropies given by the double logarithm of time log log t for the cyclic orbifold CFT.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2017. Vol. 50, no 24, 244001
Keyword [en]
entanglement entropy, conformal field theory, quantum quenches
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-208783DOI: 10.1088/1751-8121/aa6e08ISI: 000401617500001Scopus ID: 2-s2.0-85019611572OAI: oai:DiVA.org:kth-208783DiVA: diva2:1110153
Funder
Knut and Alice Wallenberg Foundation
Note

QC 20170615

Available from: 2017-06-15 Created: 2017-06-15 Last updated: 2017-06-15Bibliographically approved

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