Signals faster than light in nonlinear quantum dynamics

✍ Scribed by Thomas F. Jordan; Zoe-Elizabeth Sariyianni

• Book ID: 104337762
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 44 KB
• Volume: 263
• Category: Article
• ISSN: 0375-9601
• DOI: 10.1016/s0375-9601(99)00595-2

✦ Synopsis

Recent ideas and experiments strengthen Gisin's argument that Weinberg's nonlinear generalization of quantum mechanics allows signals faster than light. Employing a classical signal as in quantum teleportation supports Gisin's use of 'preparation at a distance' in determining how the nonlinear dynamics of one of two correlated spins responds to measurements on the other, if there is time for the classical signal. A quantum signal faster than light can be avoided only if there is an abrupt change in the nonlinear dynamics when gradual adjustments of distances reach the point where there is no longer time for a signal at the speed of light, but that runs counter to experimental findings that quantum correlations do not change where there is no time for such a signal.