期刊
PHYSICAL REVIEW LETTERS
卷 112, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.171603
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资金
- National Science Foundation (NSF) [PHY11-25915]
- Simons Foundation
- Sloan Foundation
- NSF [PHY08-44827, PHY13-16617]
- Division Of Physics
- Direct For Mathematical & Physical Scien [0844827] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1316617] Funding Source: National Science Foundation
We consider single interval Renyi and entanglement entropies for a two dimensional conformal field theory on a circle at nonzero temperature. Assuming that the finite size of the system introduces a unique ground state with a nonzero mass gap, we calculate the leading corrections to the Renyi and entanglement entropy in a low temperature expansion. These corrections have a universal form for any two dimensional conformal field theory that depends only on the size of the mass gap and its degeneracy. We analyze the limits where the size of the interval becomes small and where it becomes close to the size of the spatial circle.
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