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Optimal discrimination of quantum operations
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Optimal discrimination of quantum operations
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We address the problem of discriminating with minimal error probability two given quantum operations. We show that the use of entangled input states generally improves the discrimination. For Pauli channels we provide a complete comparison of the optimal strategies where either entangled or unentangled input states are used.
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Cited by 1 Pith paper
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Entanglement in quantum channel discrimination: sometimes less is more
The paper shows that for some pairs of unitary channels, perfect discrimination is possible with separable states but nearly impossible with maximally entangled states, introducing MEWC and MEBC concepts.
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