Nature Physics, Published online: 25 September 2026; doi:10.1038/s41567-026-03445-7
Quantum systems composed of many particles can decay much faster than the sum of their individual decay rates. Now, a universal speed limit of many-body decay has been revealed, providing bounds on applications that rely on collective emission and a potential constraint on the scalability of quantum technologies.
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- A universal speed limit for collective decay in quantum systems
- An information-theoretic proof of the Planckian bound for thermalizationNature Physics, Published online: 24 September 2026; doi:10.1038/s41567-026-03397-y Studies of many-body physics have indicated that thermalization processes are bounded by a timescale determined by Planck’s constant. Such a bound has now been proved to apply in general using techniques from quantum information theory.
- Strange metal behaviour from underlying bad metallicityNature Physics, Published online: 24 September 2026; doi:10.1038/s41567-026-03441-x The origin of the strange metal state is still not known. Now, numerical results suggest that it follows from the quantum statistics of charge carriers, not the temperature dependence of the processes that scatter them.
- Probing picosecond depairing currents in type-II superconductorsNature Physics, Published online: 24 September 2026; doi:10.1038/s41567-026-03469-z Vortex motion and heating prevent direct-current measurements from reaching the intrinsic depairing limit of type-II superconductors. Picosecond pulses bypass these effects and reveal a sharp threshold in NbN but gradual pair breaking in YBa2Cu3O7.
- String-breaking dynamics in a quantum simulatorNature Physics, Published online: 23 September 2026; doi:10.1038/s41567-026-03422-0 The study of string breaking in gauge theories involves the real-time evolution of charges, which is difficult to simulate. Spatiotemporal dynamics of string breaking in a one-dimensional gauge model have now been observed in a trapped-ion platform.
- Quantum many-body mixed phase space revealed by hybrid feedback controlNature Physics, Published online: 23 September 2026; doi:10.1038/s41567-026-03431-z Regular and chaotic trajectories can coexist in classical systems, but identifying an equivalent in quantum many-body dynamics is difficult. A feedback protocol on a superconducting processor now reveals and stabilizes such mixed dynamics.
- Publisher Correction: Optical control of electrons in a Floquet topological insulatorNature Physics, Published online: 23 September 2026; doi:10.1038/s41567-026-03497-9 Publisher Correction: Optical control of electrons in a Floquet topological insulator
- Integrate physics education research by fixing departmental structuresNature Physics, Published online: 17 September 2026; doi:10.1038/s41567-026-03451-9 Integrate physics education research by fixing departmental structures
