Spin flips and quantum information for anti-parallel spins

Details Spin flips and quantum information for anti-parallel spins Spin flips and quantum information for anti-parallel spins

1999-01-26

arxiv.org/abs/quant-ph/9901072v1

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.83.432

We consider two different ways to encode quantum information, by parallel or anti-parallel pairs of spins. We find that there is more information in the anti-parallel ones. This purely quantum mechanical effect is due to entanglement, not of the states but occuring in the course of the measuring process. We also introduce a range of quantum information processing machines, such as spin-flip and anti-cloning.

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