physics

Using a single trapped strontium-88 ion, an Oxford group built cat states whose components are themselves squeezed and trisqueezed states, reporting Wigner negativity and greater quantum resourcefulness than standard cat or Fock states.

A Mamyshev oscillator on an erbium-doped silicon nitride chip delivers 1.05 nJ pulses as short as 147 fs, matching tabletop femtosecond lasers.

A Monash University team reports in Nature Photonics the first integrated chip that can create, route, and read information carried in light's 'valley' degree of freedom.

University of Hong Kong team shows ultrathin polycrystalline diamond membranes generate voltage when bent, overturning the century-old classification of diamond as non-piezoelectric.

University of Pennsylvania researchers demonstrated strongly nonlinear exciton-polaritons that switch optical signals at 4 femtojoules—a record low for 2D polariton systems—using a MoSe₂ monolayer inside a photonic crystal nanocavity.

Sodium nanoparticles of 5,000 to 10,000 atoms diffract through ultraviolet laser gratings, reaching macroscopicity μ = 15.5 in a Nature paper from the Arndt group.

Researchers at Aalto University demonstrated they can connect a continuous time crystal to a mechanical oscillator without destroying it, turning the exotic quantum state into an optomechanics-like platform that ran for up to 108 cycles.

Powell and Buchalter show in Physical Review B that periodically switched magnetic fluxes through a Harper-Hofstadter lattice can produce topological phases that no equilibrium material can host.

Physicists at the University of Wurzburg used a gallium arsenide quantum film cooled to -269.15 C to measure KPZ scaling exponents in 2D, four years after the 1D version was confirmed.

A University of Oxford group has experimentally demonstrated quadsqueezing, a fourth-order quantum interaction long thought too weak to observe, by harnessing non-commutativity between two laser-driven forces on a single trapped ion.

A Tokyo University of Science team has observed first-order matter-wave diffraction of positronium passing through a few-layer graphene grating, the first direct evidence that the short-lived electron-positron atom behaves as one coherent quantum object and a step toward gravity tests on antimatter.

Independent teams publishing in Nature and Nature Communications show that doping infinite-layer nickelates with europium revives superconductivity at magnetic fields that should destroy it.