Monday, July 29, 2013

1307.6926 (Yuji Sekino et al.)

Quantum-information Division and Optimal Uncorrelated Cloning    [PDF]

Yuji Sekino, Satoshi Ishizaka
We consider quantum-information division, which is characterized by a cloning channel whose outputs have no correlation and are not completely randomized. We show that the quantum-information division is possible in a probabilistic manner by optimizing the average fidelity in the channel with $M$ outputs in both deterministic and probabilistic cases. Moreover, we show that the optimal fidelities drastically change depending on the condition imposed on the outputs (symmetric and asymmetric), which is quite contrast to the case of imperfect cloning.
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