Preparation of pure and mixed polarization qubits and the direct measurement of figures of merit

Details Preparation of pure and mixed polarization qubits and the direct measurement of figures of merit Preparation of pure and mixed polarization qubits and the direct measurement of figures of merit

2006-06-22

arxiv.org/abs/quant-ph/0606191v2

Phys. Rev. A 75, 012104 (2007)

Physics

Quantum Physics

5 pages, 3 figures, 1 table

Scientific paper

10.1103/PhysRevA.75.012104

Non-classical joint measurements can hugely improve the efficiency with which
certain figures of merit of quantum systems are measured. We use such a
measurement to determine a particular figure of merit, the purity, for a
polarization qubit. In the process we highlight some of subtleties involved in
common methods for generating decoherence in quantum optics.

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