J.L. Romero, J.C. Retamal, L. Roa and C. Saavedra
REVISTA MEXICANA DE FISICA 48 (2002)
A physical implementation of an entanglement purification protocol is studied using a cavity quantum electrodynamic hased proposal, where the quantum information is stored in quantum field states inside cavities. Also a procedure is given for quantifying the degree of entanglement between quantum fields.