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Certain fish shoals ward off bird attacks by touching the water surface in a manner resembling waves observed in stadiums. This behaviour exhibits characteristics that suggest the fish might operate close to criticality.
The presence of small thermal regions in a many-body localized system could lead to its delocalization. An experiment with cold atoms now monitors the delocalization induced by the coupling of a many-body localized region with a thermal bath.
The interaction of strong laser fields with tungsten disulfide leads to light-dressed Floquet replica of excitonic states, which manifest as new features in the transient absorption spectrum.
Photonic waveguides with appropriately engineered interactions allow the experimental realization of non-Abelian quantum holonomies of the symmetry group U(3), which is known from the strong nuclear force.
The Luttinger liquid is a theoretical concept used to describe interacting fermions in a 1D system. Now it is shown that the model also describes electron physics in η-Mo4O11, a quasi-2D material in which 1D chains cross each other.
A continuum active solid system is realized in a bacterial biofilm. Self-sustained elastic waves are observed, and two modes of collective motion with a sharp transition between them are identified.
Interspecies comparisons between atomic optical clocks are important for several technological applications. A recently proposed spectroscopy technique extends the interrogation times of clocks, leading to highly stable comparison between species.
During development, tissues with complex topology emerge from collections of cells with simple geometry. This process in neuroepithelial organoids is governed by two topologically distinct modes of epithelial fusion.
Single-molecule magnetic tweezers enable probing the folding dynamics of a single talin protein for long periods of time. This allows the observation of previously inaccessible rare and kinetically trapped conformations.
The notion of chirality in dynamical systems with broken spatial symmetry but preserved time inversion symmetry has led to the concept of truly chiral phonons. These have now been observed in bulk HgS using circularly polarized Raman spectroscopy.
The IceCube Collaboration reports a search for quantum gravity effects imprinted in flavour conversions of astrophysical neutrinos. No evidence for anomalous conversions between neutrino flavours is observed.
The superconducting critical temperature of monolayer materials is often lower than their bulk counterparts. Now, intercalation is shown to induce two-dimensional superconducting properties while maintaining the bulk critical temperature.
Electrons in the non-superconducting state of cuprates can exhibit unusual transport behaviour. Now, analysis of experimental data shows that the magnetoresistance in this state is conventional, but influenced by an anisotropic scattering rate.
Cavitation refers to the emergence of bubbles from liquids undergoing pressure reduction. A hitherto unknown cavitation scenario is now reported, with bubbles originating from the atomically smooth interface between two immiscible liquids.
Periodic kicking of a quantum system leads to dynamical localization and to the failure of thermalization. Measurements on a kicked Bose–Einstein condensate now show how many-body interactions induce the breakdown of dynamical localization.
The quantum kicked rotor is a paradigmatic non-interacting model of quantum chaos and ergodicity breaking. An experiment with a kicked Bose–Einstein condensate now explores the influence of many-body interactions on the onset of quantum chaos.
As laser action emerges from fluorescence, its emission wavelength lies within the fluorescence spectrum. Exploiting multiphonon processes can take the laser emission far beyond the spectral limits defined by a material’s intrinsic fluorescence.
