Implementation of projective measurements with linear optics and continuous photon counting
- 23 February 2005
- journal article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 71 (2)
- https://doi.org/10.1103/physreva.71.022318
Abstract
We investigate the possibility of implementing a given projection measurement using linear optics and arbitrarily fast feedforward based on the continuous detection of photons. In particular, we systematically derive the so-called Dolinar scheme that achieves the minimum error discrimination of binary coherent states. Moreover, we show that the Dolinar-type approach can also be applied to projection measurements in the regime of photonic-qubit signals. Our results demonstrate that for implementing a projection measurement with linear optics, in principle, unit success probability may be approached even without the use of expensive entangled auxiliary states, as they are needed in all known (near-)deterministic linear-optics proposals.Comment: 11 pages, 2 figures, updated to the published versioKeywords
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