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hep-th2009★ 635 cited
Entanglement entropy in free quantum field theory
H. Casini, M. Huerta
In this review we first introduce the general methods to calculate the entanglement entropy for free fields, within the Euclidean and the real time formalisms. Then we describe the…
hep-th2009★ 173 cited
Reduced density matrix and internal dynamics for multicomponent regions
H. Casini, M. Huerta
We find the density matrix corresponding to the vacuum state of a massless Dirac field in two dimensions reduced to a region of the space formed by several disjoint intervals. We c…