1. SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, UK.
2. Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany.
3. Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany.
4. CPHT, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, F-91128 Palaiseau, France.
5. Institut de Physique, Collège de France, 11 place Marcelin Berthelot, 75005 Paris, France.
6. Diamond Light Source, Harwell Campus, Didcot, OX11 0DE, UK.
7. Center for Computational Quantum Physics, Flatiron Institute, New York, NY 10010, USA.
8. DQMP, Université de Genève, 24 quai Ernest Ansermet, CH-1211 Genève, Switzerland.