Connectivity of the Hilbert space. Credit: Zlatko Papić

Quantum scars of bosons with correlated hopping

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    Laser cooling of rare-earth-doped silica may provide a route to vibration-free refrigeration of integrated photonic circuits and quantum sensors to reduce the thermal noise. Here, cooling of high-purity Yb-doped silica to 0.7 K below ambient temperature is demonstrated using sub-optimal laser parameters, and in spite of a substantial extra thermal load.

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    Laser-driven ion acceleration is an important topic for next-generation compact accelerators and material characterisation. The authors present a theoretical study on ion acceleration with near-critical double-layer targets that supports the experimental realisation of these targets and the interpretation of experiments of laser-ion acceleration.

    • Andrea Pazzaglia
    • , Luca Fedeli
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    • , Alessandro Maffini
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  • Perspective
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    The neutron-rich, weakly bound fluorine isotope 29F has been extensively investigated theoretically, but its significance has been revived by recent experiments. The authors present the latest developments and make prediction on the electromagnetic transitions occurring in this isotope that may be observed in the near future.

    • L. Fortunato
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    Many features of a superconductor are encoded in the Josephson effect and understanding changes at the local level can help explain related phenomena. Here, the authors use scanning tunnelling microscopy to study local changes in the Josephson effect and how they relate to the transport channel configuration.

    • Jacob Senkpiel
    • , Simon Dambach
    • , Markus Etzkorn
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    The concept of arrow of time expressing time asymmetric nature is intrinsically related to the second law of thermodynamics and increase of entropy. The authors show how a thermodynamic bath expected to add to entropy increase can be the key to time reversal for an unknown quantum state, paving the way to universal algorithms sending temporal evolution of an arbitrary system backward in time.

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    Curvature effects in a magnetic system are usually described by treating local and non-local interactions separately. Here, the authors develop a theory of curvilinear micromagnetism and report a non-local chiral interaction which is absent in flat systems.

    • Denis D. Sheka
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    An outstanding challenge in active matter physics is to control the motion of active particles. Here, the authors present a motility trap that can be applied to any self-propulsion scheme, and combine experiments, theory, and simulations to demonstrate robust spatio-temporal control of active particles.

    • Soudeh Jahanshahi
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    Yu–Shiba–Rusinov subgap excitations are associated with a range of interesting physics such as Majorana fermions, and so it is important to understand their intrinsic features. Here, the authors investigate the temperature dependence of the Yu–Shiba–Rusinov states in a hybrid nanowire–quantum dot system, demonstrating that the shift in energy does not follow the behaviour predicted by current models.

    • Juan Carlos Estrada Saldaña
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Editor's Highlights - <i>Communications Physics</i>

Jorden Senior - doi: 10.1038/s42005-020-0307-5

Editor's Highlights - Communications Physics

To celebrate our second birthday, our editors have selected their preferred articles from 2019.

Elena Belsole

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