TY - JOUR AU - Somma, Rolando AU - Ortiz, Gerardo AU - Barnum, Howard AU - Knill, Emanuel AU - Viola, Lorenza 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 -