April 13, 2015
Author(s)
Michael S. Foss-Feig, Zhexuan Gong, Charles W. Clark, Alexey V. Gorshkov
In non-relativistic quantum theories with short-range Hamiltonians, a velocity $v$ can be chosen such that the influence of any local perturbation is approximately confined to within a distance $r$ until a time $t \sim r/v$, thereby defining a linear light