Decoherence without Dissipation

TL;DR

A simple model is presented that illustrates such energy-free decoherence in the presence of energy conservation and avoids the ‘black hole information’ problem.

Abstract

That decoherence can take place in the presence of energy conservation seems to be a poorly known fact. That lack of knowledge has for example bedevilled the discussion of the "black hole information" problem. I present a simple model which illustrates such energy free decoherence.