Numerical determination of entanglement entropy for a sphere

Zusammenfassung

We apply Srednicki's regularization to extract the logarithmic term in the entanglement entropy produced by tracing out a real, massless, scalar field inside a three-dimensional sphere in 3 + 1 flat spacetime. We find numerically that the coefficient of the logarithm is -1/90 to 0.2 percent accuracy, in agreement with an existing analytical result. (c) 2010 Published by Elsevier B.V.