M. Mourigal¹², Ch. Rüegg^1,2,13,14, R. Valentí³, and B. Normand¹⁵

• ¹Quantum Criticality and Dynamics Group, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland
• ²Institute for Quantum Electronics, ETH Zurich, CH-8093 Hönggerberg, Switzerland
• ³Institut für Theoretische Physik, Goethe-Universität Frankfurt, 60438 Frankfurt-am-Main, Germany
• ⁴Department of Physics and Astronomy, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
• ⁵The University of Manchester at Harwell, Diamond Light Source, Didcot, Oxfordshire OX11 0DE, United Kingdom
• ⁶School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, United Kingdom
• ⁷PSI Center for Neutron and Muon Sciences, CH-5232 Villigen-PSI, Switzerland
• ⁸Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), Tokai 319-1106, Ibaraki, Japan
• ⁹Materials and Life Science Division, J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
• ¹⁰Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
• ¹¹European Spallation Source ERIC (ESS), P.O. Box 176, SE, 221 00 Lund, Sweden
• ¹²School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
• ¹³Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva, Switzerland
• ¹⁴Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
• ¹⁵PSI Center for Scientific Computing, Theory and Data, CH-5232 Villigen-PSI, Switzerland

• ^*Contact author: leonie.spitz@psi.ch