Measuring the knot of degeneracies and eigenvalue braids near a third-order exceptional point
Y. S. S. Patil, J. Höller, P. A. Henry, C. Guria, Y. Zhang, L. Jiang, N. Kralj, N. Read, J. G. E. Harris
Nature 607, 271-275 (2022)
arXiv:2112.00157 (2021)