Physics – Quantum Physics
Scientific paper
2007-02-08
Phys. Rev. Lett. 98, 250501 (2007)
Physics
Quantum Physics
4 pages, 2 figures
Scientific paper
10.1103/PhysRevLett.98.250501
We present a quantum circuit that implements a non-demolition measurement of complementary single- and bi-partite properties of a two-qubit system: entanglement and single-partite visibility and predictability. The system must be in a pure state with real coefficients in the computational basis, which allows a direct operational interpretation of those properties. The circuit can be realized in many systems of interest to quantum information.
Bergou Janos A.
Davidovich Luiz
Melo Fernando de
Walborn Stephen P.
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