Cloning of a quantum measurement

Details Cloning of a quantum measurement Cloning of a quantum measurement

2011-03-29

arxiv.org/abs/1103.5709v2

Phys. Rev. A 84, 042330 (2011)

Physics

Quantum Physics

10 pages, 1 figure

Scientific paper

10.1103/PhysRevA.84.042330

We analyze quantum algorithms for cloning of a quantum measurement. Our aim is to mimic two uses of a device performing an unknown von Neumann measurement with a single use of the device. When the unknown device has to be used before the bipartite state to be measured is available we talk about 1 -> 2 learning of the measurement, otherwise the task is called 1 -> 2 cloning of a measurement. We perform the optimization for both learning and cloning for arbitrary dimension of the Hilbert space. For 1 -> 2 cloning we also propose a simple quantum network that realizes the optimal strategy.

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