Test of the linearity of quantum mechanics in optically pumped
- 10 December 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 65 (24) , 2931-2934
- https://doi.org/10.1103/physrevlett.65.2931
Abstract
Measurement of the free precession of nuclear spins in optically pumped ground-state atoms has allowed a test of Weinberg’s nonlinear generalization of quantum mechanics. Shifts among the three resolved precession frequencies in the spin-3/2 system were studied as a function of the projection of spin polarization along the precession axis. Our results set an upper limit on ε, Weinberg’s nonlinearity parameter, of ‖ε‖/2πħ<3.8μ Hz, which corresponds to 2.0× of the binding energy per nucleon. This is the most stringent such limit to date.
Keywords
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