Entanglement transfer experiment in NMR quantum information processing
Nicolas Boulant, Evan M. Fortunato, Marco A. Pravia, Grum Teklemariam, David G. Cory, Timothy F. Havel · Physical Review A · 2002
We report the implementation of an entanglement transfer on a four-qubit liquid-state nuclear-magnetic resonance quantum information processor. This consists of creating an (pseudopure) entangled state among two directly coupled spins, and then transferring this two-spin state to another pair of spins whose direct interactions are negligible. Such transfers are expected to be an essential operation in scalable quantum computer architectures, and provide a useful benchmark for the coherent control available in specific implementations.