Nature Physics, Published online: 07 January 2025; doi:10.1038/s41567-024-02740-5
Defects known as two-level systems are a major source of noise for superconducting qubits. Adding a phononic crystal is now shown to extend the lifetime of these two-level systems, which could lead to improved qubit coherence.
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- Non-Markovian dynamics of a superconducting qubit in a phononic bandgap
- A solid-state electrolyte with liquid-like vibrational characterNature Physics, Published online: 06 January 2025; doi:10.1038/s41567-024-02698-4 Solid-state electrolytes with high ionic conductivity are promising candidates for battery applications. Experiments in one of these materials now reveal a mechanism that mediates ionic diffusivity and mirrors the vibrational properties of liquids.
- Liquid-like dynamics in a solid-state lithium electrolyteNature Physics, Published online: 06 January 2025; doi:10.1038/s41567-024-02707-6 Understanding the mechanism of ionic diffusion in superionic materials is crucial for their potential applications in solid-state batteries. Now liquid-like dynamics that break the Debye law of lattice dynamics have been demonstrated in a lithium electrolyte.
- Effect of energetic ions on edge-localized modes in tokamak plasmasNature Physics, Published online: 06 January 2025; doi:10.1038/s41567-024-02715-6 Edge-localized plasma modes in a tokamak can damage its innermost wall. Simulations now show that fast ions can modify the spatio-temporal structure of these modes. These effects need to be considered in the optimization of control techniques.
- Activity-induced annealing leads to a ductile-to-brittle transition in amorphous solidsNature Physics, Published online: 02 January 2025; doi:10.1038/s41567-024-02724-5 Active glasses are dense, disordered structures made up of motile constituents. Simulations now show that motility-driven annealing in such systems leads to mechanical changes, including increased brittleness.
- Suppression of Bogoliubov momentum pairing and emergence of non-Gaussian correlations in ultracold interacting Bose gasesNature Physics, Published online: 03 January 2025; doi:10.1038/s41567-024-02700-z In strongly correlated systems, weak interactions can lead to the formation of correlated pairs of bosons with opposite momenta. Now, an experiment on ultracold bosons shows the breakdown of this effect in the strong interaction regime.
- First-order quantum breakdown of superconductivity in an amorphous superconductorNature Physics, Published online: 03 January 2025; doi:10.1038/s41567-024-02713-8 A first-order, disorder-driven, superconductor–insulator phase transition is demonstrated. This is in contrast with the usually observed second-order transition and highlights the role of Coulomb interactions between preformed Cooper pairs.
- Large quantum fluctuations observed in strongly interacting bosonsNature Physics, Published online: 03 January 2025; doi:10.1038/s41567-024-02701-y Among weakly interacting bosons, quantum fluctuations are akin to those of harmonic oscillators, and they manifest themselves through positive correlations between particles of opposite momenta. A quantum-gas experiment reveals that, by cranking up the interactions, these correlations are suppressed, and hence that quantum fluctuations become strong and anharmonic.
