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Spatial heterogeneity in disease transmission rates and in mixing patterns between regions makes predicting epidemic trajectories hard. Quantifying the mixing rates within and between spatial regions can improve predictions.
Applications of atom interferometry require sufficiently long coherence times. Now, confining atoms in an optical lattice shows that the decoherence rate slows down markedly at hold times that exceed tens of seconds.
The application of quantum computing to computational chemistry faces various experimental and theoretical challenges. Now, a quantum simulation on a noisy quantum device has achieved chemical accuracy for small H2 and LiH molecules.
The observation of edge modes in topological systems is challenging because precise control over the sample and occupied states is required. An experiment with atoms in a driven lattice now shows how edge modes with programmable potentials can be realized.
Remote detection protocols use waves scattering off a target, but a formal description of how waves acquire and transmit information about objects has been lacking. The density and flux of Fisher information now provide a way to understand this process.
Topological boundary modes within charge-ordered states have not yet been observed experimentally. Now an in-gap boundary mode, stemming solely from the charge order, is visualized in the topological material Ta2Se8I.
Some features resembling superconductivity at high temperature have been seen under pressure in La3Ni2O7, but a transition to a zero-resistance state has not been observed. Now transport studies demonstrate this transition, along with strange metallicity.
An analysis of images from the Juno spacecraft reveals dynamics at high latitudes that are reminiscent of the generation of frontal structures in Earth’s atmosphere and oceans.
A superfluid is a macroscopic system with zero viscosity through which entropy is reversibly transported by waves. An unexpected transport phenomenon has now been observed between two superfluids, where irreversible entropy transport is enhanced by superfluidity.
In solids, the quantum metric captures the quantum coherence of the electron wavefunctions. Recent experiments demonstrate the detection and manipulation of the quantum metric in a noncollinear topological antiferromagnet at room temperature.
Multi-step transitions between a variety of topological spin textures have been unveiled in a centrosymmetric magnet, which may enable efficient multistate memory and logic devices.
Supracellular cues play a key role in directing collective cell migration in processes such as wound healing and cancer invasion. New findings emphasize the importance of all length scales of the microenvironment in shaping cell migration patterns.
The nature of turbulence that occurs when fluids flow in a pipe is still controversial. Now the onset of turbulence in pipe flow has been shown to be a directed-percolation phase transition.
Quantum geometry and electron–phonon coupling are two fundamental concepts in condensed matter physics that govern many correlated ground states. Now a generalized theory connects these two ideas.
The nature of the fractional quantum Hall state when the lowest Landau level is half-filled remains controversial. Now, the observation of a topological phase transition at related filling fractions suggests that the half-filled state is non-Abelian.
The sign of the Casimir force depends on the electric permittivities and the magnetic permeabilities of the materials involved. For a gold sphere immersed in a ferrofluid, tuneability of the Casimir force by means of a magnetic field is now shown.