Locality and Nonlinear Quantum Mechanics
arXiv:1401.7018 · doi:10.1142/S0217751X15500293
Abstract
Nonlinear modifications of quantum mechanics generically lead to nonlocal effects which violate relativistic causality. We study these effects using the functional Schrodinger equation for quantum fields and identify a type of nonlocality which causes nearly instantaneous entanglement of spacelike separated systems. We describe a simple example involving widely separated wave-packet (coherent) states, showing that nonlinearity in the Schrodinger evolution causes spacelike entanglement, even in free field theory.
12 pages, 1 figure, v2: version to appear in IJMPA