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Showing 1–10 of 10 results
Advanced filters: Author: Andreas Nunnenkamp Clear advanced filters

  • Discrete time crystals are typically characterized by a period doubled response with respect to an external drive. Here, the authors predict the emergence of rich dynamical phases with higher-order and fractional periods in clean spin-1/2 chains with long-range interactions.

    • Andrea Pizzi
    • Johannes Knolle
    • Andreas Nunnenkamp
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7

  • A model of a classical discrete time crystal satisfying the criteria of persistent subharmonic response robust against thermal noise and defects has been lacking. Here, the authors show that these criteria are satisfied in one-dimensional probabilistic cellular automata with long-range interactions and bistability.

    • Andrea Pizzi
    • Andreas Nunnenkamp
    • Johannes Knolle
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-8

  • Malz et al. show how electromagnetic driving leads to amplification of topological magnon edge states and thus a large steady-state magnon edge current. Their approach should yield experimental signatures of topological magnon edge states and has potential applications in magnon spintronics.

    • Daniel Malz
    • Johannes Knolle
    • Andreas Nunnenkamp
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-7

  • Measurements of motion that avoid quantum backaction, with the potential to surpass the standard quantum limit, have so far been demonstrated using microwave radiation. Here, Shomroni, Qiu et al. demonstrate a backaction-evading measurement of the motion of a nanomechanical beam using laser light.

    • Itay Shomroni
    • Liu Qiu
    • Tobias J. Kippenberg
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-7

  • Strongly driven light sources have become useful in many ways but are limited to classical emission. A quantum-optical theory now shows how non-classical states of light can be achieved from strongly-driven many-body systems, for example, non-coherent and correlated high-harmonic generation.

    • Andrea Pizzi
    • Alexey Gorlach
    • Ido Kaminer
    Research
    Nature Physics
    Volume: 19, P: 551-561

  • In information processing applications, directional amplifiers are key components which can be realized in very different systems. Here, the authors present a theoretical framework based on the introduction of a topological invariant that helps to understand directional amplification in coupled cavity arrays.

    • Clara C. Wanjura
    • Matteo Brunelli
    • Andreas Nunnenkamp
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-13