The Shannon-McMillan Theorem for Ergodic Quantum Lattice Systems
arXiv:math/0207121
Abstract
We formulate and prove a quantum Shannon-McMillan theorem. The theorem demonstrates the significance of the von Neumann entropy for translation invariant ergodic quantum spin systems on n-dimensional lattices: the entropy gives the logarithm of the essential number of eigenvectors of the system on large boxes. The one-dimensional case covers quantum information sources and is basic for coding theorems.
21 pages, extended version concerning subalgebras