# Partial entanglement entropy The Partial Entanglement Entropy (PEE) is defined as$s_A\left(A_i\right) \equiv \int_{A_i} f_A(x) d x,$where $A_i$ is a subregion of $A$ and $f_A(x)$ is the density of the entanglement entropy of $A$:$S(A)=\int_A f_A(x) d x.$ ## Refs - interpretation as the component flow flux in a locking [[0211 Bit thread|bit thread]] - [[2021#Lin, Sun, Zhang]] - in the [[0213 Islands|island]] phase - [[2024#Wen, Xu, Zhong]]