Information Loss

Abstract

The fact that information loss is easy to add as a feature in deterministic models, while it seems inevitably to lead to loss of unitarity in quantum mechanics, requires our attention. One could demand that our deterministic models should all preserve information, but it is more interesting to ask what happens if we do start with deterministic models with information loss. Here it is shown that such models do allow for a quantum interpretation as well, but they lead to internal local symmetries, as well as an arrow of time. We do have local gauge symmetries in elementary particles, and we do have an arrow of time in thermodynamics.