Research articles

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  • The beating of motile cilia arises from the collective action of hundreds of proteins. A study of the dynamics of cilia under different environmental and genetic conditions shows that the space of beating variations is low-dimensional.

    • Veikko F. Geyer
    • Jonathon Howard
    • Pablo Sartori
    Article Open Access
  • Network models rarely fix the number of connections of each node during evolution, despite this being needed in real-world applications. Addressing this need, a new approach can grow scale-free networks without preferential attachment.

    • Shubha R. Kharel
    • Tamás R. Mezei
    • Zoltan Toroczkai
  • Insulating states that are formed because of pairing between electrons and holes are known to exist in engineered bilayer structures in high magnetic fields. Now evidence suggests they can occur in a monolayer crystal at zero field.

    • Yanyu Jia
    • Pengjie Wang
    • Sanfeng Wu
  • Exciton condensation has been observed in various three-dimensional (3D) materials. Now, monolayer WTe2—a 2D topological insulator—also shows the phenomenon. Strong electronic interactions allow the excitons to form and condense at high temperature.

    • Bosong Sun
    • Wenjin Zhao
    • David H. Cobden
    Article Open Access
  • The modern understanding of quantum transport relies on geometric concepts such as the Berry phase. The geometric approach has now been extended to the theory of optical transitions.

    • Junyeong Ahn
    • Guang-Yu Guo
    • Ashvin Vishwanath
  • The complexity of many-body quantum states makes their evolution difficult to simulate with classical computers. Experiments on a 2D nine-qubit device demonstrate that the key properties of quantum lattices can be accessed by measuring out-of-time-ordered correlators.

    • Jochen Braumüller
    • Amir H. Karamlou
    • William D. Oliver
  • Active matter exhibits a plethora of collective phenomena in both biological and artificial systems. In a model system of colloidal rollers, polar states in active liquids can be controlled.

    • Bo Zhang
    • Hang Yuan
    • Alexey Snezhko
  • Observations of an electronic nematic phase in twisted double bilayer graphene expand the number of moiré materials where this interaction-driven state exists.

    • Carmen Rubio-Verdú
    • Simon Turkel
    • Abhay N. Pasupathy
  • Twisted double bilayer graphene is predicted to be a topological insulator under certain conditions. Simultaneous bulk and edge measurements now show metallic transport with a bulk bandgap, suggestive of this prediction.

    • Yimeng Wang
    • Jonah Herzog-Arbeitman
    • Emanuel Tutuc
  • Evaluations of quantum computers across architectures need reliable benchmarks. A class of benchmarks that can directly reflect the structure of any algorithm shows that different quantum computers have considerable variations in performance.

    • Timothy Proctor
    • Kenneth Rudinger
    • Robin Blume-Kohout
  • The performance of superconducting devices can be degraded by quasiparticle generation mechanisms that are difficult to identify and eliminate. Now, a small superconducting island can be kept quasiparticle free for seconds at a time.

    • E. T. Mannila
    • P. Samuelsson
    • J. P. Pekola