‘Quantum Nonlocality without Entanglement’ in a Pair of Qubits

Masato Koashi; Masato Koashi; Fumitaka Takenaga; Fumitaka Takenaga; Takashi Yamamoto; Takashi Yamamoto; Nobuyuki Imoto; Nobuyuki Imoto

doi:10.1364/WEQD.2008.P4

OSA Workshop on Entanglement and Quantum Decoherence
Technical Digest Series (Optica Publishing Group, 2008),
paper P4
•https://doi.org/10.1364/WEQD.2008.P4

‘Quantum Nonlocality without Entanglement’ in a Pair of Qubits

Masato Koashi, Fumitaka Takenaga, Takashi Yamamoto, and Nobuyuki Imoto

Workshop on Entanglement and Quantum Decoherence 2008

Nara Japan
28–30 January 2008
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M. Koashi, F. Takenaga, T. Yamamoto, and N. Imoto, "‘Quantum Nonlocality without Entanglement’ in a Pair of Qubits," in OSA Workshop on Entanglement and Quantum Decoherence, Technical Digest Series (Optica Publishing Group, 2008), paper P4.

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Abstract

We consider unambiguous discrimination between separable bipartite states, one being pure and the other being a rank-2 mixed state. We show that the optimal success probability achieved by separable measurements is never achieved under LOCC.

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