Nature Physics, Published online: 08 April 2025; doi:10.1038/s41567-025-02881-1
Controlled dissipation enables the extraction of equilibrium properties of ultracold one-dimensional gases through the observation of anomalous dynamics.
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- Resourceful dissipation
- Bacterial second messengers achieve extraordinary signal capacityNature Physics, Published online: 08 April 2025; doi:10.1038/s41567-025-02856-2 Second messengers are intracellular signalling molecules that relay environmental changes and prompt cellular responses. Through an information-theory framework coupled with quantitative experiments, the second-messenger molecule cAMP, in the bacterium Pseudomonas aeruginosa, is shown to achieve information transmission rates of up to 40 bits per hour.
- Concurrent spin squeezing and field tracking with machine learningNature Physics, Published online: 08 April 2025; doi:10.1038/s41567-025-02855-3 Simultaneous spin squeezing and the detection of dynamic fields is challenging as entanglement generation and signal interrogation often interfere. An experiment now demonstrates stable spin squeezing and field tracking in a hot atomic ensemble.
- Mode-resolved, non-local electron–phonon coupling in two-dimensional spectroscopyNature Physics, Published online: 08 April 2025; doi:10.1038/s41567-025-02861-5 Probing electron–phonon matrix elements in bulk materials is difficult. Now, an all-optical experimental approach is demonstrated that extracts phonon-mode- and electron-energy-resolved electron–phonon matrix elements in the bulk.
- The strongly driven Fermi polaronNature Physics, Published online: 07 April 2025; doi:10.1038/s41567-025-02799-8 Fermi polarons are quasiparticles formed by impurities immersed in a Fermi gas. An experiment in an ultracold fermionic gas now shows how to control their properties with a tunable radio-frequency field.
- Observation of polarization density waves in SrTiO<sub>3</sub>Nature Physics, Published online: 07 April 2025; doi:10.1038/s41567-025-02874-0 Despite exhibiting ferroelectric features, SrTiO3 fails to display long-range polar order at low temperatures due to quantum fluctuations. An ultrafast X-ray diffraction experiment now probes polar dynamics of this material at the nanometre scale.
- Marangoni flows underlie symmetry breaking in early mouse gastruloidsNature Physics, Published online: 07 April 2025; doi:10.1038/s41567-025-02840-w Spherical aggregates of mouse stem cells exhibit symmetry breaking by forming an elongated axis. This extension is driven by a recirculating Marangoni-like tissue flow, providing insights into the tissue mechanics underlying embryonic development.
- Shape-recovering liquidsNature Physics, Published online: 04 April 2025; doi:10.1038/s41567-025-02865-1 Placing particles at the interface between immiscible fluids usually enhances emulsification. However, now it is shown that if the particles are ferromagnetic, emulsification is suppressed and a non-planar recoverable interfacial shape develops.
