Quantum position diffusion and its implications for the quantum linear Boltzmann equation
I. Kamleitner, James D. Cresser · Physical Review A · 2010
We derive a quantum linear Boltzmann equation from first principles to describe collisional friction, diffusion, and decoherence in a unified framework. In doing so, we discover that the previously celebrated quantum contribution to position diffusion is not a true physical process, but rather an artifact of the use of a coarse-grained time scale necessary to derive Markovian dynamics.