High Energy Physics - Theory
[Submitted on 2 Oct 2025
]
Title: Entanglement entropy between tangent balls in CFT$_D$
Title: CFT中切球之间的纠缠熵$_D$
Abstract: We apply the universal method developed in \cite{Jiang:2025jnk} to compute the entanglement entropy between two tangent balls in CFT$_D$. When taking the radius of one ball to infinity, it gives the entanglement entropy between a ball and its tangent half plane. In two-dimensional case, this configuration is equivalent to the entanglement in boundary conformal field theory (BCFT) between the negative half-axis and an interval ending on the boundary.
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