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  • The simulation of quantum dynamics is a challenging task to solve with classical resources. An experiment with a trapped-ion quantum processor now shows the efficient simulation of the evolution of large-scale many-body quantum systems.

    • Eli Chertkov
    • Justin Bohnet
    • Michael Foss-Feig
  • Trapped ion quantum computers can use two different kinds of ion to avoid crosstalk between adjacent qubits. Encoding two different qubit types in only one ion species can achieve the same goal while reducing experimental complexity.

    • Cornelius Hempel
    News & Views
  • Measurements of four different infinite-layer nickelates show that magnetic behaviour coexists with superconductivity. This is different from what is seen in cuprates, giving a strong distinction between the two classes of oxide superconductors.

    • Jennifer Fowlie
    • Marios Hadjimichael
    • Andreas Suter
  • Interactive protocols can verify that a quantum computer exhibits a computational speedup using only classical analysis of its output. Exploiting a connection to Bell’s theorem gives a simpler protocol that is much less demanding for experiments.

    • Gregory D. Kahanamoku-Meyer
    • Soonwon Choi
    • Norman Y. Yao
    Article Open Access
  • A fundamental technical challenge in the analysis of network data is the automated discovery of communities — groups of nodes that are strongly connected or that share similar features or roles. In this Comment we review progress in the field over the past 20 years.

    • Santo Fortunato
    • Mark E. J. Newman
  • An experiment with photonic waveguides demonstrates the connection between non-Abelian holonomies and adiabatic particle transport, paving the way to the geometric and topological control of light trajectories.

    • Laura Pilozzi
    • Valentina Brosco
    News & Views
  • Non-Abelian Thouless pumping, whose outcome depends on the order of pumping operations, has been observed in photonic waveguides with degenerate flat bands.

    • Yi-Ke Sun
    • Xu-Lin Zhang
    • Hong-Bo Sun
  • Edge modes in chiral topological systems can carry quantum information without backscattering. A topological lattice of superconducting resonators has been coupled to a qubit, providing a platform for chiral quantum electrodynamics and communication.

    • John Clai Owens
    • Margaret G. Panetta
    • David I. Schuster
  • Cells can sense the mechanical properties of their environment. By adjusting the ruffling of their membranes, cells respond to different viscosities of their surrounding liquid medium.

    • Laura M. Faure
    • Pere Roca-Cusachs
    News & Views
  • Unconventional superconductivity is often associated with the presence of other kinds of electronic order. Observations of charge order in infinite-layer nickelate superconductors show that they fit this pattern.

    • Matteo Rossi
    • Motoki Osada
    • Wei-Sheng Lee
  • Living cells change their behaviour in response to the viscosity of the medium surrounding them. An in vitro study shows that cells spread wider and move faster in a highly viscous medium, provided they have an actively ruffling lamellipodium.

    • Matthew Pittman
    • Ernest Iu
    • Yun Chen
  • Across the world, decisions on investment and policy are made under the assumption of continuous economic expansion. Fundamental physical limits may soon put an end to this phase of development, as foreshadowed by the 1972 report The Limits to Growth.

    • Thomas W. Murphy Jr
  • Qudits are generalizations of qubits that have more than two states, which gives them a performance advantage in some quantum algorithms. The operations needed for a universal qudit processor have now been demonstrated using trapped ions.

    • Martin Ringbauer
    • Michael Meth
    • Thomas Monz
  • Colloidal random lasers are hard to design and control. Combining optically controlled micro-heaters with thermophilic particles attracted by them leads to microlasers with programmable and reversible patterns.

    • Neda Ghofraniha
    News & Views
  • Experiments inspired by the behaviour of active matter show that an external optical stimulus can spatially reconfigure colloidal random lasers and continuously tune their lasing threshold.

    • Manish Trivedi
    • Dhruv Saxena
    • Giorgio Volpe