Gisin's theorem and no-faster-than-light signaling

Date: 
Friday, November 28, 2014
Room: 
204
Speaker: 
Mohammad Bahrami
Abstract: 
One way to study possible theories beyond standard quantum theory is to modify Schrodinger equation by adding new terms. If we aim at resolving the measurement problems, the new terms should be non-linear. However, it has been shown by Gisin and many others, that a deterministic nonlinear modification of Schrodinger gives rise to superluminal signalling. We shall discuss the detail of Gisin's argument and related issues.
References: 
- N. Gisin. Stochastic quantum dynamics and relativity. Helv. Phys. Acta, 62(4):363–371, 1989. - N. Gisin. Weinberg’s non-linear quantum mechanics and superluminal communications. Phys. Lett. A, 143(1-2):1–2, 1990. - N. Gisin and M. Rigo. Relevant and irrelevant nonlinear Schrödinger equations. J. Phys. A, 28(24):7375–7390, 1995. - A. Bassi, K. Lochan, S. Satin, T. P. Singh, and H. Ulbricht. Models of wave-function collapse, underlying theories, and experimental tests. Rev. Mod. Phys., 85:471–527, 2013.