Entanglement entropy via double-cone regularization

This paper proposes an alternative regularization method for handling the ultraviolet behavior of entanglement entropy. Utilizing an i ε prescription in the Euclidean double cone geometry, it accurately reproduces the universal behavior of entanglement entropy. The method is demonstrated in the free...

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Bibliographic Details
Published in:Physical review. D 2024-08, Vol.110 (4), Article 046011
Main Authors: Kawamoto, Taishi, Suzuki, Yu-ki
Format: Article
Language:English
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Summary:This paper proposes an alternative regularization method for handling the ultraviolet behavior of entanglement entropy. Utilizing an i ε prescription in the Euclidean double cone geometry, it accurately reproduces the universal behavior of entanglement entropy. The method is demonstrated in the free boson theory in arbitrary dimensions and two-dimensional conformal field theories. The findings highlight the effectiveness of the i ε regularization method in addressing ultraviolet issues in quantum field theory and gravity, suggesting potential applications to other calculable quantities.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.110.046011