Probing Sensitivity Near a Quantum Exceptional Point Using Waveguide Quantum ElectrodynamicsRemoveAziza Almanakly, Réouven Assouly, Harry Hanlim Kang, Michael Gingras, Bethany M. Niedzielski, Hannah Stickler, Mollie E. Schwartz, Kyle Serniak, Max Hays, Jeffrey A. Grover, and William D. OliverPhys. Rev. Lett. 136, 183601 (2026)