TY - RPRT TI - Improved bound on nonlinear quantum mechanics using a cryogenic radio frequency experiment AU - Melnychuk, Oleksandr [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] (ORCID:0000000220898685) AU - Giaccone, Bianca [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] (ORCID:0000000272758465) AU - Bornman, Nicholas [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] (ORCID:0000000241266759) AU - Cervantes, Raphael [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] (ORCID:0000000313861005) AU - Grassellino, Anna [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] (ORCID:0000000239858296) AU - Harnik, Roni [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] (ORCID:0000000172937175) AU - Kaplan, David E. [Johns Hopkins Univ., Baltimore, MD (United States)] (ORCID:0000000181754506) AU - Nahal, Geev [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] AU - Pilipenko, Roman [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] (ORCID:0000000163230354) AU - Posen, Sam [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] (ORCID:000000026499306X) AU - Rajendran, Surjeet [Johns Hopkins Univ., Baltimore, MD (United States)] (ORCID:0000000199153573) AU - Sushkov, Alexander O. [Boston Univ., MA (United States); Johns Hopkins Univ., Baltimore, MD (United States)] PY - 2025 DO - 10.1103/gkg6-fqsc UR - https://www.osti.gov/biblio/2479558 ID - 2479558 ER -