Spin Flips and Quantum Information for Antiparallel Spins
Spin Flips and Quantum Information for Antiparallel Spins
We consider two different ways to encode quantum information, by parallel or antiparallel pairs of spins. We find that there is more information in the antiparallel ones. This purely quantum mechanical effect is due to entanglement, not of the states but occurring in the course of the measuring process. We …