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Hawking radiation is observed emanating from an analogue black hole, with measurements of the entanglement between the pairs of particles inside and outside the hole offering tantalizing insights into the field of black hole thermodynamics.
Animals moving in groups are expected to differ from their many-body counterparts in equilibrium. A method based on maximum entropy shows that the interactions in starling flocks rearrange slowly enough to permit an equilibrium description locally.
Parity–time symmetry in optics is studied in a warm atomic vapour, where its counterpart, anti-parity–time symmetry, as well as refractionless propagation, can also be observed.
The prediction of an antiferromagnetic semimetal that breaks both time-reversal and inversion symmetry but respects their combination could provide a platform for studying the interplay between Dirac fermions and magnetism.
The response of amorphous solids to external stress is not very well understood. A study now shows that certain glasses, upon decreasing temperature, undergo a phase transition characterized by diverging nonlinear elastic moduli.
A scanning tunnelling spectroscopy study focuses on the lightly doped region of the phase diagram of a cuprate superconductor to reveal the microscopic evolution of a high-temperature superconductor from a charge-ordered insulator.
Cell motility is typically described as a random walk due to the presence of noise. But a dynamical model suggests that dendritic cells move deterministically, alternating between fast and slow motility, and exhibiting periodic polarity reversals.
The control of long-range interactions is an essential ingredient for the study of exotic phases of matter using atoms in optical lattices. Such control is demonstrated using Rydberg dressing: the coupling of ground state atoms to Rydberg states.
The common policy of replacing infected individuals with healthy substitutes can have the effect of accelerating disease transmission. A dynamic network model suggests that standard modelling approaches underplay the effect of network structure.
Using a superconducting transmon qubit coupled to a microwave photonic crystal one can study intriguing strong-coupling effects such as the emergence of localized cavity modes within the photonic bandgap.
Studies of supercurrent phenomena, such as superconductivity and superfluidity, are usually restricted to cryogenic temperatures, but evidence suggests that a magnon supercurrent can be excited in a Bose–Einstein magnon condensate at room temperature.
The spin–momentum locking of Dirac surface states offers intriguing possibilities for converting between charge and spin currents. Experiments show that fine tuning of the Fermi level is critical for maximizing the efficiency of such conversions.
The interaction between the outflow of gas from a quasar and the interstellar medium can boost protons to relativistic energies. Collisions between such protons can explain a significant fraction of the unexplained extragalactic gamma-ray background.
Ice is a frustrated system: many ground states are possible due to the structure of a water molecule and the geometry of the ice lattice. Now, this frustration is shown to lead to high-Tc ferroelectric proton ordering in a heteroepitaxial ice film.
A detailed and systematic study of Ca10Cr7O28 reveals all the hallmarks of spin-liquid behaviour, in spite of the compound’s unusually complex structure.
The anomalous Hall effect is usually associated with ferromagnets but a large anomalous Hall response can be found in topologically non-trivial half-Heusler antiferromagnets thanks to Berry phase effects associated with symmetry breaking.
A method for analysing STM data enables the recovery of information about quasiparticle scattering in the form of holographic maps. The approach is verified for superconducting cuprates, but may find applications in heavy-fermion materials research.
An experiment reports the unexpected behaviour of an object in uniform motion in superfluid helium-3 above the Landau critical velocity — the limit above which it can generate excitations at no energy cost.
Certain proteins are capable of self-replicating, including those associated with Alzheimer’s disease. Simulations now pinpoint the adsorption of monomeric proteins onto protein fibril surfaces as the mechanism responsible for self-replication.
