TY - JOUR AU - Rolando Somma AU - Gerardo Ortiz AU - Howard Barnum AU - Emanuel Knill AU - Lorenza Viola C2 - Physical Review A (Atomic, Molecular and Optical Physics) DA - 2004-10-01 00:10:00 LA - en M1 - 70 PB - Physical Review A (Atomic, Molecular and Optical Physics) PY - 2004 TI - Nature and Measure of Entanglement in Quantum Phase Transactions ER -