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Quantum weak values
Pryde, O'Brien, White and 2 others
arXiv (Cornell University)27 Dec 2004Open access
NobleIDark:/48914/w1/20260515/32D763DFDOI10.48550/arxiv.quant-ph/0412204
Quantum weak values
Pryde, O'Brien, White and 2 others · arXiv (Cornell University) · 2004
NobleIDark:/48914/w1/20260515/32D763DFDOI10.48550/arxiv.quant-ph/0412204
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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 size of the weak value with measurement strength, obtaining an average measurement of the S_1 Stokes parameter more than an order of magnitude outside of the operator's spectrum for the smallest measurement strengths.