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Author(s): Ali Hosseinnia, Michele Marrocco, Francesco Vergari, Meena Raveesh, Sebastian Riewer, Ashutosh Jena, Abhishek Kushwaha, Francesco Mazza, Mark Linne, Joakim Bood, and Isaac Boxx Conventional femtosecond coherent laser spectroscopy predominantly focuses on the temporal phase coherence through time- or frequency-resolved methods. In this Letter, we suggest an alternative experimental framework based on spatial phase coherence. The intrinsic...

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): Daniel I. Herman, Molly Kate Kreider, Noah Lordi, Mathieu Walsh, Eugene J. Tsao, Alexander J. Lind, Matthew Heyrich, Joshua Combes, Scott A. Diddams, and Jérôme Genest Manipulating the quantum noise of continuous-wave lasers through squeezing has reshaped optical interferometry. However, progress in optical frequency comb interferometry with pulsed squeezed sources has been limited, despite the role of frequency combs in ultraprecise...

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): Renhao Tao, Ohad Lib, Flavien Gyger, Hendrik Timme, Maximilian Ammenwerth, Immanuel Bloch, and Johannes Zeiher Metastable atomic qubits are a highly promising platform for the realization of quantum computers, owing to their scalability and the possibility of converting leakage errors to erasure errors midcircuit. Here, we demonstrate and characterize a high-fidelity quantum gate set for the metastable fine-… [Phys. Rev. Lett. 136...

Author(s): Marko Haertelt, WenZhuo Wu, XuanYang Lai, Andrei Yu. Naumov, XiaoJun Liu, Paul B. Corkum, and André Staudte We present strong-field photoelectron holography measurements of hydrogen chloride (HCl) that resolve subcycle dynamics in two ionization channels associated with the HOMO and HOMO-1 orbitals. The holograms in the photoelectron momentum distributions show different cutoffs and interference fringes t… [Phys. Rev. Lett. 136,...

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