Full counting statistics and symmetry resolved entanglement for free conformal theories with interface defects
arXiv:2302.08209 · doi:10.1088/1742-5468/ace3b8
Abstract
We consider the ground state of two species of one-dimensional critical free theories coupled together via a conformal interface. They have an internal global symmetry and we investigate the quantum fluctuations of the charge across the impurity, giving analytical predictions for the full counting statistics, the charged moments of the reduced density matrix and the symmetry resolved Rényi entropies. Our approach is based on the relation between the geometry with the defect and the homogeneous one, and it provides a way to characterise the spectral properties of the correlation functions restricted to one of the two species. Our analytical predictions are tested numerically, finding a perfect agreement.
arXiv commentTwo introductory paragraphs and a technical appendix added
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