Some realizable joint measurements of complementary observables |
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Authors: | Paul Busch |
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Institution: | (1) Institut für Theoretische Physik, Universität zu Köln, D-5000 Köln 41, FRG |
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Abstract: | Noncommuting quantum observables, if considered asunsharp observables, are simultaneously measurable. This fact is exemplified for complementary observables in two-dimensional state spaces. Two proposals of experimentally feasible joint measurements are presented for pairs of photon or neutron polarization observables and for path and interference observables in a photon split-beam experiment. A recent experiment proposed and performed by Mittelstaedt, Prieur, and Schieder in Cologne is interpreted as a partial version of the latter example.Work partly supported by the DFG, Bonn, and the BMFT, Bonn.Dedicated to Professor Ulrich Hauser on the occasion of his 60th birthday, November 1986. |
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