期刊
LETTERS IN MATHEMATICAL PHYSICS
卷 110, 期 4, 页码 713-733出版社
SPRINGER
DOI: 10.1007/s11005-019-01238-z
关键词
Conformal field theory; Relative entropy; Schwarzian action
资金
- Max-Planck Society [Bez. M.FE.A.MATN0003]
- IHES
We consider the relative entropy between the vacuum state and a state obtained by applying an exponentiated stress tensor to the vacuum of a chiral conformal field theory on the lightray. The smearing function of the stress tensor can be viewed as a vector field on the real line generating a diffeomorphism. We show that the relative entropy is equal to c times the so-called Schwarzian action of the diffeomorphism. As an application of this result, we obtain a formula for the relative entropy between the vacuum and a solitonic state.
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