976 publications from this institution
John Bell proposed an ontology for the GRW modification of quantum mechanics in terms of flashes occurring at space-time points. The paper spells out the motivation for this ontology, enquires into the status of the wave-function in it, critically examines the claim of its being Lorentz-invariant and considers whether it is a parsimonious, but nevertheless physically adequate ontology.
Intercomparisons of refracted near field measurements have shown variations as large as 20% in refractive index difference between instruments and with measurements made by axial interferometry. In one type of instrument errors were due to the use of a gaussian light intensity distribution rather than the lambertian distribution required for linear operation and accurate calibration. We have found it possible to reliably correct for this source of error using software developed to run on the instrument's computer.
