Nature Physics, Published online: 11 June 2025; doi:10.1038/s41567-025-02887-9
Trapped ions are promising for electrometry but limited by their weak intrinsic spin coupling to electric fields. Now it is shown that using a magnetic field gradient enhances sensitivity and enables precise measurements across subhertz to kilohertz frequencies.
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- Ultrasensitive single-ion electrometry in a magnetic field gradient
- Spin-selective magneto-conductivity in WSe<sub>2</sub>Nature Physics, Published online: 09 June 2025; doi:10.1038/s41567-025-02918-5 Mechanisms for generating spin-polarized currents may be helpful for applications. Now one such mechanism that uses the unusual Landau-level spectrum of WSe2 under a strong magnetic field is demonstrated.
- The positron arm of a plasma-based linear colliderNature Physics, Published online: 06 June 2025; doi:10.1038/s41567-025-02910-z The status of plasma-based acceleration of electrons and positrons is discussed, with a focus on developing the positron arm of a plasma-based electron–positron linear collider.
- Experimentally probing Landauer’s principle in the quantum many-body regimeNature Physics, Published online: 05 June 2025; doi:10.1038/s41567-025-02930-9 Landauer’s principle connects entropy and energy dissipation in non-equilibrium processes. An experiment now uses this principle to measure entropy production in a Bose gas to resolve contributions from correlations and dissipation.
- High-efficiency optical training of itinerant two-dimensional magnetsNature Physics, Published online: 04 June 2025; doi:10.1038/s41567-025-02928-3 Light at low power densities can be used to manipulate ferromagnetic domains in the two-dimensional van der Waals ferromagnet Fe3GeTe2. This capability could be used to engineer the behaviour of Fe3GeTe2-based devices.
- Supersolid-like sound modes in a driven quantum gasNature Physics, Published online: 02 June 2025; doi:10.1038/s41567-025-02927-4 Driven quantum systems can form long-lived states with emergent order, but their excitation properties remain largely unexplored. Now, an experiment shows that a driven superfluid exhibits sound modes characteristic of a one-dimensional supersolid.
- Precision is not limited by the second law of thermodynamicsNature Physics, Published online: 02 June 2025; doi:10.1038/s41567-025-02929-2 Clock precision is thought to be fundamentally limited by entropy production in out-of-equilibrium systems. A theoretical work now introduces a quantum clock design where precision grows exponentially with dissipation.
- A resonant valence bond spin liquid in the dilute limit of doped frustrated Mott insulatorsNature Physics, Published online: 29 May 2025; doi:10.1038/s41567-025-02923-8 The concept of resonant valence bond phases has inspired many areas of condensed matter physics, but few realistic models have been identified. Now an analytical solution of such a phase has been found for pyrochlore and related lattices.
