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NUCLEAR PHYSICS B
Volume 802, Issue 3, Pages 458-474Publisher
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DOI: 10.1016/j.nuclphysb.2008.04.024
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The entropy of entanglement between a three-dimensional slab of thickness I and its complement is studied numerically for four-dimensional SU(2) lattice gauge theory. We find a signature of a nonanalytic behavior of the entanglement entropy, which was predicted recently for large N-c confining gauge theories in the framework of AdS/CFT correspondence. The derivative of the entanglement entropy over l is likely to have a discontinuity at some l = l(c) It is argued that such behavior persists even at finite temperatures, probably turning into a sort of crossover for temperatures larger than the temperature of the deconfinement phase transition. We also confirm that the entanglement entropy contains quadratically divergent l-independent term, and that the nondivergent terms behave as l(-2) at small distances. (C) 2008 Elsevier B.V. All rights reserved.
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