Modal Majorana Sphere and Hidden Symmetries of Structured-Gaussian Beams

Author(s): R. Gutiérrez-Cuevas, S. A. Wadood, A. N. Vamivakas, and M. A. AlonsoStructured-Gaussian beams are shown to be fully and uniquely represented by a collection of points (or a constellation) on the surface of the modal Majorana sphere, providing a complete generalization of the modal Poincaré sphere to higher-order modes. The symmetries of this...

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Linewidth Narrowing with Ultimate Confinement of an Alkali Multipole Plasmon by Modifying Surface Electronic Wave Functions with Two-Dimensional Materials

Author(s): Shunsuke Tanaka, Tatsuya Yoshida, Kazuya Watanabe, Yoshiyasu Matsumoto, Tomokazu Yasuike, Marin Petrović, and Marko KraljThis work demonstrates significant line narrowing of a surface multipole plasmon (MP) by modifying the surface electronic wave function with two-dimensional materials (2DMs): graphene and hexagonal boron nitride. This is...

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Many-Body Dephasing in a Trapped-Ion Quantum Simulator

Author(s): Harvey B. Kaplan, Lingzhen Guo, Wen Lin Tan, Arinjoy De, Florian Marquardt, Guido Pagano, and Christopher MonroeHow a closed interacting quantum many-body system relaxes and dephases as a function of time is a fundamental question in thermodynamic and statistical physics. In this Letter, we analyze and observe the persistent temporal fluctuations...

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Origin of Friction in Superlubric Graphite Contacts

Author(s): Cangyu Qu, Kunqi Wang, Jin Wang, Yujie Gongyang, Robert W. Carpick, Michael Urbakh, and Quanshui ZhengMore than thirty years ago, it was theoretically predicted that friction for incommensurate contacts between atomically smooth, infinite, crystalline materials (e.g., graphite, MoS2) is vanishing in the low speed limit, and this corresponding...

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Chern-Simons Origin of Superstring Integrability

Author(s): Kevin Costello and Bogdan Stefański, Jr.We derive the AdS5×S5 Green-Schwarz superstring from four-dimensional Beltrami-Chern-Simons theory reduced on a manifold with singular boundary conditions. In this construction, the Lax connection and spectral parameter of the integrable superstring have a simple geometric origin in four dimensions...

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Multiparticle Interference of Pairwise Distinguishable Photons

Author(s): Alex E. Jones, Adrian J. Menssen, Helen M. Chrzanowski, Tom A. W. Wolterink, Valery S. Shchesnovich, and Ian A. WalmsleyOne of the central principles of quantum mechanics is that if there are multiple paths that lead to the same event and there is no way to distinguish between them, interference occurs. It is often assumed that distinguishing...

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Simultaneous Determination of Neutron-Induced Fission and Radiative Capture Cross Sections from Decay Probabilities Obtained with a Surrogate Reaction

Author(s): R. Pérez Sánchez, B. Jurado, V. Méot, O. Roig, M. Dupuis, O. Bouland, D. Denis-Petit, P. Marini, L. Mathieu, I. Tsekhanovich, M. Aïche, L. Audouin, C. Cannes, S. Czajkowski, S. Delpech, A. Görgen, M. Guttormsen, A. Henriques, G. Kessedjian, K. Nishio, D. Ramos, S. Siem, and F. ZeiserReliable neutron-induced-reaction cross sections of unstable...

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Nanoscale Critical Phenomena in a Complex Fluid Studied by X-Ray Photon Correlation Spectroscopy

Author(s): D. Sheyfer, Qingteng Zhang, J. Lal, T. Loeffler, E. M. Dufresne, A. R. Sandy, S. Narayanan, S. K. R. S. Sankaranarayanan, R. Szczygiel, P. Maj, L. Soderholm, M. R. Antonio, and G. B. StephensonThe advent of high-speed x-ray photon correlation spectroscopy now allows the study of critical phenomena in fluids to much smaller length scales and...

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Fundamental Limit of Phase Coherence in Two-Component Bose-Einstein Condensates

Author(s): Yifan Li, Krzysztof Pawłowski, Boris Décamps, Paolo Colciaghi, Matteo Fadel, Philipp Treutlein, and Tilman ZiboldWe experimentally and theoretically study phase coherence in two-component Bose-Einstein condensates of Rb87 atoms on an atom chip. Using Ramsey interferometry we determine the temporal decay of coherence between the |F=1,mF=−1⟩...

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Demonstration of Dissipative Quasihelical Edge Transport in Quantum Anomalous Hall Insulators

Author(s): Shu-Wei Wang, Di Xiao, Ziwei Dou, Moda Cao, Yi-Fan Zhao, Nitin Samarth, Cui-Zu Chang, Malcolm R. Connolly, and Charles G. SmithDoping a topological insulator (TI) film with transition metal ions can break its time-reversal symmetry and lead to the realization of the quantum anomalous Hall (QAH) effect. Prior studies have shown that the longitudinal...

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