Volume 20

  • No. 7 July 2024

    Cell doublet pirouette

    Cells can pair up and form a rotating doublet. Linjie Lu and collaborators have shown that these rotations are spontaneously caused by an uneven distribution of myosin within cell cortices. This polarized distribution breaks the mirror symmetry of the doublet. These results highlight how active mechanical forces drive collective cell motion.

    See Lu et al.

  • No. 6 June 2024

    Neutrinos probe quantum gravity

    The existence of fluctuations in the metric of spacetime induced by quantum gravity would have an impact on neutrinos produced in cosmic-ray air showers. They would lose their quantum coherence, causing their flavour oscillations to change. The IceCube collaboration reports a search for this effect but finds no evidence for it, thus constraining the magnitude of anomalous decoherence from quantum gravity.

    See IceCube Collaboration

  • No. 5 May 2024

    Non-classical correlations

    Quantum devices need to be linked together in such a way that entanglement can be shared between them. Meesala et al. demonstrate a step towards this goal by developing a transducer capable of generating microwave-optical photon pairs that can be used to share non-classical correlations between an optical link and a superconducting quantum device.

    See Meesala et al.

  • No. 4 April 2024

    Material time in a material world

    The way in which glassy materials age can be difficult to describe. The concept of material time allows for the description of this physical ageing in a linear way. Multispeckle dynamic light scattering experiments now provide experimental access to material time and show that intensity fluctuations become statistically reversible when referenced in this way.

    See Böhmer

  • No. 3 March 2024

    Universal dynamics out of equilibrium

    The dynamics of isolated quantum many-body systems far from equilibrium is a field of study that pertains to many situations, including ultracold atoms, quantum spin magnets, and quark–gluon matter. Here, magnetization measurements in a spinor atomic gas show a way to classify universal dynamics based on symmetry and topology.

    See Huh et al. and Prüfer

  • No. 2 February 2024

    Emergent higher orders

    The dynamics of complex systems are often modelled using low-rank matrices, but the formal validity of this method has not yet been confirmed. Thibeault et al. present an analysis of random networks and real-world data that sheds light on this low-rank hypothesis and its implications.

    See Thibeault et al. and Gao

  • No. 1 January 2024

    Coherent control in chaotic cavities

    Non-Hermitian physics enables dynamic control of optical behaviour in real time, such as reflectionless scattering modes, which have now been demonstrated in a chaotic photonic microcavity.

    See Jiang et al. and Stone