%0 Journal Article
%T Entropy and Area
%A Mark Srednicki
%J Physics
%D 1993
%I arXiv
%R 10.1103/PhysRevLett.71.666
%X The ground state density matrix for a massless free field is traced over the degrees of freedom residing inside an imaginary sphere; the resulting entropy is shown to be proportional to the area (and not the volume) of the sphere. Possible connections with the physics of black holes are discussed.
%U http://arxiv.org/abs/hep-th/9303048v2