2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93539We show how to create maximally entangled EPR pairs between spatially distant atoms, each of them inside a high-Q optical cavity, by sending photons through a general, noisy channel, such as a standard optical fiber. An error correction scheme that uses few auxiliary atoms in each cavity effectively eliminates photoabsorption and other transmission errors. This realizes the `absorption free channel.' A concatenation protocol using the absorption free channel allows for quantum communication with single qubits over distances much larger than the coherence length of the channel.12 pages, latex, rspublic.sty, 4 figures, uses epsf macro. For the Royal Society meeting on quantum computationQuantum Physicstext