1. Aix-Marseille Université, Université de Toulon, CNRS, CPT, Marseille, France
2. Physics Program, Bard College, 30 Campus Road, Annandale-on-Hudson, New York 12504, USA
3. Center for Space, Time and the Quantum, 13288 Marseille, France; Department of Philosophy and Rotman Institute, Western University, London N6A 3K7, Ontario, Canada; Aix-Marseille Université, Université de Toulon, CNRS, CPT, Marseille, France; and Perimeter Institute, 31 Caroline Street North, Waterloo N2L 2Y5, Ontario, Canada
4. Department of Physics & Astronomy, Western University, London N6A 3K7, Ontario, Canada and Department of Philosophy and Rotman Institute, Western University, London N6A 3K7, Ontario, Canada