Entanglement cost of two-qubit orthogonal measurements

Details Entanglement cost of two-qubit orthogonal measurements Entanglement cost of two-qubit orthogonal measurements

2010-05-28

arxiv.org/abs/1005.5236v2

J. Phys. A: Math. Theor. 43 (2010) 455303

Physics

Quantum Physics

Latex, 4 pages, minor changes

Scientific paper

The "entanglement cost" of a bipartite measurement is the amount of shared entanglement two participants need to use up in order to carry out the given measurement by means of local operations and classical communication. Here we numerically investigate the entanglement cost of generic orthogonal measurements on two qubits. Our results strongly suggest that for almost all measurements of this kind, the entanglement cost is strictly greater than the average entanglement of the eigenstates associated with the measurements, implying that the nonseparability of a two-qubit orthogonal measurement is generically distinct from the nonseparability of its eigenstates.

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