Nature Physics, Published online: 10 December 2025; doi:10.1038/s41567-025-03127-w
Despite being derived from the unit of time, the hertz is a unit in its own right. It has remained a much beloved unit since its establishment almost one hundred years ago, as Karen Mudryk recounts.
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- Love hertz
- Level the slopesNature Physics, Published online: 10 December 2025; doi:10.1038/s41567-025-03147-6 Social connections can unlock opportunities that are advantageous to careers in physics. However, this resource is unevenly distributed, and its benefits can’t always overcome the negative effects of societal stereotypes and biases.
- A super-conducting diode with ultimate efficiency and noise resilience at 77 KNature Physics, Published online: 11 December 2025; doi:10.1038/s41567-025-03118-x An electrical method is shown to reliably introduce nonreciprocal behaviour across a Josephson junction made of high-temperature cuprate superconductors, which then, under microwave irradiation, forms a ‘quantum superconducting diode’. The device is magnetic-field-free, works at a temperature of 77 K with a diode efficiency of 100%, and, owing to Shapiro steps that quantize the output voltage, has robust noise-filtering.
- Temporal anti-parity–time symmetry in diffusive transportNature Physics, Published online: 10 December 2025; doi:10.1038/s41567-025-03129-8 Applying concepts from non-Hermitian physics to diffusive systems enables the static control of heat transport. Now, this notion is expanded to dynamic control, including a demonstration of programmed thermal transport in a metamaterial.
- Arbitrary control over multimode wave propagation for machine learningNature Physics, Published online: 08 December 2025; doi:10.1038/s41567-025-03094-2 Photonic processors are limited by the bulkiness of discrete components and wiring complexity. An experiment now demonstrates a reprogrammable two-dimensional waveguide that performs neural network inference through multimode wave propagation.
- Hofstadter’s butterfly turns magneticNature Physics, Published online: 05 December 2025; doi:10.1038/s41567-025-03126-x A fractal energy pattern known as the Hofstadter butterfly has now been observed separately for each spin in a two-dimensional semiconductor, revealing a cascade of magnetic transitions.
- Twist-induced non-Hermitian topology of exciton–polaritonsNature Physics, Published online: 04 December 2025; doi:10.1038/s41567-025-03115-0 Strongly coupled light–matter systems could offer enhanced manipulation of topological phenomena. Now, tunable non-Hermitian effects are demonstrated with exciton–polaritons induced by a twist degree of freedom.
- Electrically tuned light topologyNature Physics, Published online: 03 December 2025; doi:10.1038/s41567-025-03116-z Controlling topological photonic quasiparticles is a prerequisite for their implementation in devices. Now, their precise manipulation has been demonstrated using synthetic gauge fields based on the manipulation of the material’s dielectric index.
