2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/134051A system of interacting qubits can be viewed as a non-i.i.d quantum information source. A possible model of such a source is provided by a quantum spin system, in which spin-1/2 particles located at sites of a lattice interact with each other. We establish the limit for the compression of information from such a source and show that asymptotically it is given by the von Neumann entropy rate. Our result can be viewed as a quantum analog of Shannon's noiseless coding theorem for a class of non - i.i.d. quantum information sources.22 pages, LaTex file ; Theorem 2 modifiedQuantum PhysicsInformation TheoryMathematical Physicstext