Measurement of quantum weak values of photon polarization

G. J. Pryde; J. L. O'Brien; A. G. White; T. C. Ralph; H. M. Wiseman

doi:10.1103/PhysRevLett.94.220405

Measurement of quantum weak values of photon polarization

G. J. Pryde, J. L. O'Brien, A. G. White, T. C. Ralph, H. M. Wiseman

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Abstract

We experimentally determine weak values for a single photon's polarization, obtained via a weak measurement that employs a two-photon entangling operation, and postselection. The weak values cannot be explained by a semiclassical wave theory, due to the two-photon entanglement. We observe the variation in the size of the weak value with measurement strength, obtaining an average measurement of the S1 Stokes parameter more than an order of magnitude outside of the operator's spectrum for the smallest measurement strengths.

Original language	English
Article number	220405
Journal	Physical Review Letters
Volume	94
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.94.220405
Publication status	Published - 10 Jun 2005
Externally published	Yes

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Measurement of quantum weak values of photon polarization

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