Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 1, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP01(2015)080
Keywords
Conformal and W Symmetry; AdS-CFT Correspondence; Holography and condensed matter physics (AdS/CMT)
Categories
Funding
- National Science Foundation [PHYS-1066293]
- European Research Council under the European Union's Seventh Framework Programme (FP7), ERC Grant [STG 279943]
- Fundacion La Caixa
- Science and Technology Facilities Council [ST/J000434/1, ST/L000385/1] Funding Source: researchfish
- STFC [ST/J000434/1, ST/L000385/1] Funding Source: UKRI
Ask authors/readers for more resources
We derive several new results for Renyi entropy, S-n, across generic entangling surfaces. We establish a perturbative expansion of the Renyi entropy, valid in generic quantum field theories, in deformations of a given density matrix. When applied to even-dimensional conformal field theories, these results lead to new constraints on the n-dependence, independent of any perturbative expansion. In 4d CFTs, we show that the n-dependence of the universal part of the ground state Renyi entropy for entangling surfaces with vanishing extrinsic curvature contribution is in fact fully determined by the Renyi entropy across a sphere in flat space. Using holography, we thus provide the first computations of Renyi entropy across non-spherical entangling surfaces in strongly coupled 4d CFTs. Furthermore, we address the possibility that in a wide class of 4d CFTs, the flat space spherical Renyi entropy also fixes the n-dependence of the extrinsic curvature contribution, and hence that of arbitrary entangling surfaces. Our results have intriguing implications for the structure of generic modular Hamiltonians.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available