Nature Physics, Published online: 09 July 2026; doi:10.1038/s41567-026-03362-9
Condensing ultracold polar molecules requires efficient cooling despite collisional losses. Now sodium–rubidium molecules have been brought to condensation and tuned into a self-bound droplet through control of their dipolar interactions.
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- Bose–Einstein condensate of ultracold sodium–rubidium molecules with tunable dipolar interactions
- Millisecond coherence times in gigahertz-frequency mechanical oscillatorsNature Physics, Published online: 09 July 2026; doi:10.1038/s41567-026-03314-3 Phonon decoherence in quantum high-overtone bulk acoustic-wave resonators is dominated by imperfections under the material surface. Removing the damaged subsurface layer substantially increases the performance of these devices.
- Principles of optics in Fock space for the scalable manipulation of large quantum statesNature Physics, Published online: 09 July 2026; doi:10.1038/s41567-026-03370-9 Bosonic quantum states can be understood as superpositions of eigenstates with fixed numbers of bosons. Now experiments show that mapping this representation to classical wave propagation offers an intuitive way to manipulate large quantum states.
- Emergence of Fermi’s golden rule in a quantum many-body systemNature Physics, Published online: 09 July 2026; doi:10.1038/s41567-026-03316-1 Spectroscopy of quantum many-body systems often relies on Fermi’s golden rule, but its regime of validity is unclear. Now measurements in a strongly interacting Fermi gas map the probe dynamics and identify where the rule holds and breaks down.
- Non-contact friction in ultracoherent nanomechanical resonators near dielectric materialsNature Physics, Published online: 07 July 2026; doi:10.1038/s41567-026-03350-z Understanding loss mechanisms in nanomechanical resonators has enabled ultracoherent devices with improved sensitivity. Now these resonators are found to be sensitive to non-contact friction from nearby materials, thus limiting mechanical coherence.
- Visualization of the Zhang–Rice singlet, electronic molecules and Cooper pair formation in a cuprate superconductorNature Physics, Published online: 07 July 2026; doi:10.1038/s41567-026-03375-4 How individual doped holes turn into superconducting Cooper pairs as doping increases in unconventional superconductors is still not well understood. Now, this process is observed in a paradigmatic cuprate compound.
- Topological textures in polar materialsNature Physics, Published online: 07 July 2026; doi:10.1038/s41567-026-03344-x Ferroelectric materials can host robust and diverse polarization textures. This Review examines their formation mechanisms, responses to external stimuli and potential applications in next-generation electronic devices.
- When nearby materials steal energyNature Physics, Published online: 07 July 2026; doi:10.1038/s41567-026-03279-3 Integrating high-quality-factor mechanical resonators into devices brings them close to materials, which leads to losses. Systematic studies in dielectric environments reveal that dielectrics ‘steal’ energy through charge fluctuations.
