The Decoherence Exponent: Stable Phase Noise and Constraints on Objective State Reduction

Milen V. Velev, Ivo D. Dinov

Let $L_u$ be a symmetric Levy process representing an unobserved phase lift, coupling to a quantum system via charge $Q$. Averaging $e^{i{L}_{u}Q}$ gives a completely positive dephasin…