A deficiency of Weinberg's quantum mechanics

Bruce Rosenblum, Fred Kuttner

Abstract In his book Dreams of a Final Theory, Nobel Laureate Steven Weinberg writes: “The one part of today’s physics that seems to me likely to survive unchanged in a final theory is quantum mechanics.” We share Weinberg’s intuition about the ultimate correctness of quantum mechanics.

G. Feild

Konstantin V. Kazakov

Joseph Polchinski

I show that Weinberg's nonlinear quantum mechanics leads either to communication via Einstein-Podolsky-Rosen correlations, or to communications between branches of the wave function.Received 18 June 1990DOI:https://doi.org/10.1103/PhysRevLett.66.397©1991 American Physical Society

Elihu Lubkin, Thelma Lubkin

Mark G. Raizen, Gerald N. Gilbert, Dmitry Budker

We consider possible extensions to quantum mechanics proposed by Weinberg [S. Weinberg, Phys. Rev. A 94, 042117 (2016)] and reanalyze his prediction of a new test based upon three atomic clocks in the same atom. We propose realistic experimental systems where this hypothesis can be tested. Two systems already set limits on deviations from quantum mechanics, while with another system one would be able to search for new physics at the limit of sensitivity of the best atomic clocks.