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  • Electric dipole moments (EDMs) of atoms and molecules are a sensitive probe for sources of time-reversal symmetry violation beyond the standard model. In this Perspective, we review recent progress in EDM searches with atoms and molecules and survey proposed next-generation experiments.

    • William B. Cairncross
    • Jun Ye
  • Although the differential equations that describe the physical climate system are deterministic, there are reasons, both theoretical and practical, why computational representations of these equations should be stochastic. This Perspective surveys the benefits of stochastic modelling of weather and climate.

    • T. N. Palmer
  • Atomically precise measurements in 2D materials can be used to quantify the effects of energetic electron irradiation. In this Perspective, we discuss how understanding of electron–matter interactions can help to stimulate the development of quantitative models that are generalizable to a wide range of materials.

    • Toma Susi
    • Jannik C. Meyer
    • Jani Kotakoski
  • This Perspective describes how statistical physics helps understand some of the key aspects of cities: their spatial structure and social organization, the distribution of their population, urban mobility and how some critical factors vary with population.

    • Marc Barthelemy
  • Synthetic dimensions provide a way to artificially engineer extra spatial dimensions through other degrees of freedom. We review how synthetic dimensions have emerged as a promising tool for quantum simulations of topological lattice models in atomic, molecular and optical systems.

    • Tomoki Ozawa
    • Hannah M. Price
  • An analysis of the number of physicists and their career paths reveals the changing landscape of the physics subdisciplines, highlighting the connections between different fields and the effects of large collaborations.

    • Federico Battiston
    • Federico Musciotto
    • Roberta Sinatra