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Author(s): Trevor Olsson, William Medlin, Jody Davis, Scott Chumley, Courtney Wicklund, Nicholas San Juan, Gregory Young, and Guillaume M. Laurent We present a novel experimental approach to retrieve both the ionization and return times in high harmonic generation from the spectral phases of the radiation generated by a two-color femtosecond field. By performing a detailed characterization of the phases as both the ratio and delay between the...

Author(s): Filip Marijanović, Sambuddha Chattopadhyay, Luka Skolc, Timo Zwettler, Catalin-Mihai Halati, Simon B. Jäger, Thierry Giamarchi, Jean-Philippe Brantut, and Eugene Demler Recent quench experiments on ultracold atoms in optical cavities provide a clean platform for studying how long-range interactions in atomic media structure their nonequilibrium dynamics. Motivated by these experiments, we provide a theoretical analysis of the quench...

Author(s): Ruiling Weng, Elias R. Koch, Jesús Yelo-Sarrión, Josep Batle, Neil G. R. Broderick, Julien Javaloyes, and Svetlana V. Gurevich We report the first experimental observation of discrete time crystal phases and crystallites in an actively mode-locked semiconductor laser. By tuning either the bias current or the modulation frequency, the system undergoes a spontaneous symmetry-breaking transition from the harmonically mode-lock… [Phys...

Author(s): Zhihao Chen, Jikun Liu, Qiang Liu, Di Zhang, Dahuai Zheng, Wei Wu, Wei Cai, Mengxin Ren, and Jingjun Xu Continuous time crystals (CTCs) are nonequilibrium phases that spontaneously break continuous time-translation symmetry to sustain persistent oscillations under time-invariant driving. Here we report the first realization of CTC in a photorefractive carrier-transport system, using iron-doped lithium… [Phys. Rev. Lett. 136, 193802...

Author(s): Pedro H. Pereira, F. Impens, C. Farina, P. A. Maia Neto, and R. de Melo e Souza We report on a microscopic theory of quantum friction. Our approach investigates the interplay between the dispersive response and the relative center-of-mass motion of two ground-state atoms. This coupling yields a quantum force, which can be expressed as a power series in the velocity. The signifi… [Phys. Rev. Lett. 136, 193601] Published Tue May 12...

Author(s): M. Schubert, K. Mukherjee, P. Stürmer, and S. M. Reimann Rotation is a natural tool in ultracold gases to break time-reversal symmetry, yet its impact on the collective excitations of supersolids remains largely unexplored. We show theoretically that tuning the rotation frequency, rather than the interparticle interactions, can trigger the superfluid-to-s… [Phys. Rev. Lett. 136, 183401] Published Fri May 08, 2026

Author(s): Haoye Qin, Wenjing Lv, Junda Wang, Kaili Sun, Xinyang Mu, Zhanghua Han, Qinghua Song, and Cheng-Wei Qiu An experiment shows that geometric phase of Pancharatnam-Berry metasurfaces can be preserved while their intrinsic spin duality is deliberately broken. [Phys. Rev. Lett. 136, 183805] Published Fri May 08, 2026