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Author(s): Mahmudul Hasan, Jingsong Gao, Hao Liang, Yiming Yuan, Zach Eisenhutt, Ming-Shian Tsai, Ming-Chang Chen, Hans Jakob Wörner, Artem Rudenko, and Meng Han Attosecond soft-X-ray pump-probe spectroscopy of xenon and krypton atoms reveals two previously unobserved dynamical features in xenon that are inconsistent with lifetimes inferred from energy-domain measurements. [Phys. Rev. Lett. 136, 163201] Published Mon Apr 20, 2026

Author(s): Gabriel Sorci, Joshua Foo, Dietrich Leibfried, Christian Sanner, and Igor Pikovski High-precision clocks based on quantum systems will work in a regime where a quantum description of proper time might be necessary. [Phys. Rev. Lett. 136, 163602] Published Mon Apr 20, 2026

Author(s): W. Joe Meese and Rafael M. Fernandes A 19th-century theory of elasticity inspires a new way to analyze a quantum phase transition that has become central to modern quantum materials research. [Phys. Rev. Lett. 136, 166501] Published Mon Apr 20, 2026

Author(s): N. Alden et al. (ARA Collaboration) A South Pole neutrino experiment has measured radio waves induced by cosmic rays—thus demonstrating that its detection method works. [Phys. Rev. Lett. 136, 151003] Published Fri Apr 17, 2026

Author(s): Alexis Bougouin, Henri Lhuissier, Yoël Forterre, and Bloen Metzger Flows of gravity-driven, shear-thickening fluids form a sharp, vertical front that advances at constant velocity independent of released volume, flow height, and slope. [Phys. Rev. Lett. 136, 158202] Published Thu Apr 16, 2026

Author(s): Cyprien Daix, Maxime Dixmerias, Yuan-Yao He, Joris Verstraten, Tim de Jongh, Bruno Peaudecerf, Shiwei Zhang, and Tarik Yefsah Snapshot measurements of cold-atom gases reveal hidden spin correlations that could force an update of some superconductivity theories. [Phys. Rev. Lett. 136, 153402] Published Wed Apr 15, 2026

Author(s): Carlo Vanoni, Jonas Karcher, Mikael C. Rechtsman, Boris L. Altshuler, Paul J. Steinhardt, and Salvatore Torquato The systematic cancellation of leading self-energy terms causes the localization length in the 1D Anderson model to increase far beyond typical system sizes, effectively producing delocalized behavior in a regime where localization is expected. [Phys. Rev. Lett. 136, 150404] Published Tue Apr 14, 2026