Bridging particle and wave sensitivity in a detector of configurable positive operator-valued measures

Details Bridging particle and wave sensitivity in a detector of configurable positive operator-valued measures Bridging particle and wave sensitivity in a detector of configurable positive operator-valued measures

2009-02-09

arxiv.org/abs/0902.1549v1

Physics

Quantum Physics

4 pages, 4 figures, accepted for publication in Phys. Rev. Lett.

Scientific paper

We report an optical detector with tunable positive operator-valued measures (POVMs). The device is based on a combination of weak-field homodyne techniques and photon-number-resolving detection. The resulting POVMs can be continuously tuned from Fock-state projectors to a variety of phase-dependent quantum-state measurements by adjusting different system parameters such as local oscillator coupling, amplitude and phase, allowing thus not only detection but also preparation of exotic quantum states. Experimental tomographic reconstructions of classical benchmark states are presented as a demonstration of the detector capabilities.

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