Nature Physics, Published online: 26 May 2025; doi:10.1038/s41567-025-02916-7
Investigating mesoscopic systems can offer insights into the crossover between few-body and many-body regimes. Atomic arrays inside an optical cavity are now shown to enable the controlled study of critical properties on mesoscopic scales.
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- Optomechanical self-organization in a mesoscopic atom array
- Watch them growNature Physics, Published online: 23 May 2025; doi:10.1038/s41567-025-02924-7 Quasicrystals were discovered by chance about 40 years ago, and it has largely been a matter of luck to find new ones since. Now, an approach has been found to grow colloidal quasicrystals by turning a dial while directly observing them with an optical microscope.
- Long optical coherence times in a rare-earth-doped antiferromagnetNature Physics, Published online: 22 May 2025; doi:10.1038/s41567-025-02920-x Solid-state quantum devices can suffer from decoherence caused by fluctuating electron spins in the surrounding material. Operating in a regime where the electron spins become magnetically ordered produces substantially longer coherence times.
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- Interplay between light and heavy electron bands in magic-angle twisted bilayer grapheneNature Physics, Published online: 22 May 2025; doi:10.1038/s41567-025-02912-x Recent theoretical work suggested that magic-angle graphene can simultaneously host localized and itinerant electrons. Now thermoelectric measurements provide evidence of this.
- Flows of liquid light seen in the synthetic frequency space of modulated fast-gain ring lasersNature Physics, Published online: 22 May 2025; doi:10.1038/s41567-025-02886-w Photon interactions in materials typically create a gaseous bosonic state, which is prone to turbulent behaviour that disrupts coherence. But it is now shown that, using fast-gain processes in a modulated semiconductor laser, light can be stabilized in a liquid-like state, enhancing the coherence of its flow.
- Valley-controlled photoswitching of metal–insulator nanotexturesNature Physics, Published online: 21 May 2025; doi:10.1038/s41567-025-02899-5 Optical excitation is a way to control phase transitions in materials, but it lacks spatial specificity. Now, valley-selective photodoping in a Peierls insulator is demonstrated as a method to optically engineer phase textures with minimal heating.
- Quantum neural networks form Gaussian processesNature Physics, Published online: 21 May 2025; doi:10.1038/s41567-025-02883-z The connection between classical neural networks and Gaussian processes is a fundamental result in machine learning. It has now been shown that many quantum neural networks converge to Gaussian processes, enabling their use for regression tasks.
