Comment on "Uniqueness of the Equation for Quantum State Vector Collapse"
Abstract
A diffusive stochastic Schrödinger equation (SSE) is shown for the first time, such that contributes to a noncompletely positive dynamics. This contradicts to a recent Letter [arXiv:1303.4284] claiming that SSEs, under most general conditions, enforce completepositivity. The general form and parametrization of the SSE in the Letter is different from an alternative simpler result, the difference is shown to be completely redundant because of the gaugefreedom of the state vector's phase.
 Publication:

Physical Review Letters
 Pub Date:
 March 2014
 DOI:
 10.1103/PhysRevLett.112.108901
 arXiv:
 arXiv:1401.6197
 Bibcode:
 2014PhRvL.112j8901D
 Keywords:

 03.65.Ta;
 03.67.a;
 Foundations of quantum mechanics;
 measurement theory;
 Quantum information;
 Quantum Physics;
 Mathematical Physics
 EPrint:
 2 pages