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Publications

  • High-Efficiency Loading of 2400 Ytterbium Atoms in Optical Tweezer Arrays

    Author(s): Jiawen Zhu, Changfeng Chen, Li Zhou, Xiangru Xie, Chenyang Jiang, Zhuoli Ding, Fan Wu, Fan Yang, Guoqing Wang, Qihuang Gong, Peng Zhang, Sheng Zhang, and Pai Peng Using a technique applicable to other atomic species, the stable loading of 2400 neutral Ytterbium-174 atoms in an optical tweezer array represents the largest alkaline-earth-like atom array to date. [Phys. Rev. Lett. 137, 063201] Published Tue Aug 04, 2026

  • Thermodynamics and Melting of a Quantum Quasicrystal

    Author(s): Ethan C. McGarrigle, Thomas G. Kiely, Leon Balents, and Glenn H. Fredrickson A quantum quasicrystal was proposed to exist by mean-field, variational arguments in two-dimensional Rashba spin-orbit coupled BECs with dipolar interactions. Despite this remarkable prediction, there is little known about the superfluid character or stability of this quasicrystalline state against … [Phys. Rev. Lett. 137, 063401] Published Mon Aug 03, 2026

  • Coherent Control of Three-Level System Using Shaped Free Electrons

    Author(s): Dixuan Wu, Jing Li, Yuhan Jiang, and Yunquan Liu Three-level systems exhibit quantum interference effects absent in two-level systems, making them important for quantum optics. Here, we study the coherent interaction of a $\mathrm{Λ}$-type three-level system with free electrons shaped by optical near fields. By treating the electron train as a qua… [Phys. Rev. Lett. 137, 063601] Published Mon Aug 03, 2026

  • Sub-Hertz Optical Transitions in Excited ${\mathrm{Yb}}^{+}$

    Author(s): Patrick McMillin, Hassan Farhat, William Liu, and Wesley C. Campbell We present the observation of three semiforbidden transitions in singly ionized ytterbium from the metastable $^{2}{\mathrm{F}}_{7/2}^{o}$ state. Owing to the long lifetimes of both the upper and lower states involved, these transitions are narrow and complement those already frequently used in this… [Phys. Rev. Lett. 137, 053002] Published Fri Jul 31, 2026

  • Nonreciprocal and Long-Range Three-Body Interactions in Bose-Einstein Condensates Induced by Optical Feedback

    Author(s): Yi-Qing Zhang, Liang-Jun He, Han Pu, Zheng-Wei Zhou, and Yong-Chang Zhang We propose generating atom-atom three-body interactions in quantum gases by placing a quasi-two-dimensional Bose-Einstein condensate in front of two reflecting mirrors and illuminating it with dichromatic laser beams. These pumping fields traverse the condensate twice, thereby inducing a feedback ef… [Phys. Rev. Lett. 137, 053201] Published Wed Jul 29, 2026

  • Mass of Helium-4 from the Cyclotron Frequency Ratio $^{4}{\mathrm{He}}^{+}/{^{12}\mathrm{C}}^{3+}$

    Author(s): Maria Fernandez Davila, Moisés Medina Restrepo, Cristian A. Navarro, and Edmund G. Myers By measuring the cyclotron frequency ratio of $^{4}{\mathrm{He}}^{+}$ to ${^{12}\mathrm{C}}^{3+}$ in a Penning trap the mass of $^{4}\mathrm{He}$ has been determined to be 4.002 603 254 665(36) u. [The corresponding mass of the alpha particle is 4.001 506 179 662 (36) u]. This opens the possibility … [Phys. Rev. Lett. 137, 053001] Published Tue...

  • Timing Ultrafast Charge Transfer via Fano Interference beyond the Core-Hole Clock

    Author(s): Ji-Cai Liu, Nicolas Velasquez, Victor Kimberg, Sayantan Sarkar, Oksana Travnikova, Iyas Ismail, Renaud Guillemin, Man Zhang, Pavel Krasnov, Marcella Iannuzzi, Michael Odelius, Ralph Püttner, Maria Novella Piancastelli, Marc Simon, Faris Gel’mukhanov, and Tatiana Marchenko Ultrafast charge transfer (CT) lies at the heart of molecular and electronic functionality. We develop a Fano-based core-hole clock (FCHC) method that captures coherent...
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