Dynamical objectivity in quantum Brownian motion

¹ Faculty of Applied Physics and Mathematics, Gdańsk University of Technology - 80-233 Gdańsk, Poland
² Institute of Theoretical Physics and Astrophysics, University of Gdańsk - 80-952 Gdańsk, Poland
³ National Quantum Information Centre in Gdańsk - 81-824 Sopot, Poland

Received: 14 September 2015
Accepted: 16 November 2015

Abstract

Classical objectivity as a property of quantum states —a view proposed to explain the observer-independent character of our world from quantum theory, is an important step in bridging the quantum-classical gap. It was recently derived in terms of spectrum broadcast structures for small objects embedded in noisy photon-like environments. However, two fundamental problems have arisen: a description of objective motion and applicability to other types of environments. Here we derive an example of objective states of motion in quantum mechanics by showing the formation of dynamical spectrum broadcast structures in the celebrated, realistic model of decoherence —Quantum Brownian Motion. We do it for realistic, thermal environments and show their noise-robustness. This opens a potentially new method of studying the quantum-to-classical transition.