Multi‐Center Magnon Excitations Open the Entire Brillouin Zone to Terahertz Magnetometry of Quantum Magnets. - Biesner, Tobias; Roh, Seulki; Razpopov, Aleksandar; Willwater, Jannis; Süllow, Stefan; Li, Ying; Zoch, Katharina M.; Medarde, Marisa; Nuss, Jürgen; Gorbunov, Denis; Skourski, Yurii; Pustogow, Andrej; et al. (Advanced Quantum Technologies, 2022)