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- Title
Relations between entanglement, Bell-inequality violation and teleportation fidelity for the two-qubit X states.
- Authors
Hu, Ming-Liang
- Abstract
Based on the assumption that the receiver Bob can apply any unitary transformation, Horodecki et al. (Phys Lett A 222:21-25, ) proved that any mixed two spin-1/2 state which violates the Bell-CHSH inequality is useful for teleportation. Here, we further show that any X state which violates the Bell-CHSH inequality can also be used for nonclassical teleportation even if Bob can only perform the identity or the Pauli rotation operations. Moreover, we showed that the maximal difference between the two average fidelities achievable via Bob's arbitrary transformations and via the sole identity or the Pauli rotation is 1/9.
- Subjects
QUBITS; BELL'S theorem; QUANTUM teleportation; UNITARY transformations; MATHEMATICAL transformations; MATHEMATICAL proofs; NUCLEAR spin
- Publication
Quantum Information Processing, 2013, Vol 12, Issue 1, p229
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-012-0371-1