May issue

This month we demonstrate coherent control of a multi-qubit dark state, examine the Fermi surface in cuprates, and say farewell to our Letter format.

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  • Ultracold quantum technologies

    The impressive achievements made with quantum gases rely on continuous improvements in the underlying methods. This Insight reviews recent technological advances that have deepened and broadened the capabilities of ultracold gas experiments

Nature Physics is a Transformative Journal; authors can publish using the traditional publishing route OR via immediate gold Open Access.

Our Open Access option complies with funder and institutional requirements.

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  • A method to engineer higher-order interactions between photons provides a route to create non-classical and entangled states across multiple modes.

    • Srivatsan Chakram
    • Kevin He
    • David I. Schuster
    Letter
  • Magnetic skyrmions—a type of localized spin texture—have been theoretically predicted to annihilate with counterparts known as antiskyrmions. By means of electron microscopy, such annihilation has now been observed in a cubic chiral magnet.

    • Fengshan Zheng
    • Nikolai S. Kiselev
    • Rafal E. Dunin-Borkowski
    Letter Open Access
  • Combinatorial optimization is one of the areas for which quantum computing promises to overcome classical devices. An experiment with arrays of Rydberg atoms now shows how to solve combinatorial graph problems with auxiliary atomic wires.

    • Minhyuk Kim
    • Kangheun Kim
    • Jaewook Ahn
    Letter
  • The LHCb Collaboration reports the observation of an exotic, narrow, tetraquark state that contains two charm quarks, an up antiquark and a down antiquark.

    • R. Aaij
    • A. S. W. Abdelmotteleb
    • G. Zunica
    Letter Open Access
  • Fractons are particles that can only move in tandem, which substantially affects their thermalization. Below four spatial dimensions, an unconventional dynamical universality class can emerge as thermal fluctuations destroy hydrodynamic behaviour.

    • Paolo Glorioso
    • Jinkang Guo
    • Andrew Lucas
    Article
    • Quantum confinement effects offer a more comprehensive understanding of the fundamental processes that drive extreme optical nonlinearities in nano-engineered solids, opening a route to unlocking the potential of high-order harmonic generation.

      • Julien Madéo
      • Keshav M. Dani
      News & Views
    • The hydrodynamic description of many-body quantum systems is a key part of our understanding of out-of-equilibrium physics. Exotic, highly constrained quantum particles called fractons require a treatment that goes beyond hydrodynamics.

      • Olalla Castro-Alvaredo
      News & Views
    • The hunt for new particles helps to complete our understanding of hadronic matter. The LHCb Collaboration now reports the surprising observation of a doubly charmed tetraquark.

      • Zhiqing Liu
      News & Views
  • Glass, now celebrated with a dedicated International Year, continues to fascinate.

    Editorial
  • The shift of the definition of the kilogram in 2019 away from an artefact to one relying on the Planck constant inspires technological innovation, as Naoki Kuramoto elucidates.

    • Naoki Kuramoto
    Measure for Measure
  • Against the backdrop of various philosophical accounts, this Comment argues for the need of a human rights approach to scientific progress, which requires us to rethink how we view scientific knowledge.

    • Michela Massimi
    Comment
  • As conventions in scholarly publishing evolve, it is appropriate to reassess the options that we provide to our authors. In this spirit, Nature Physics will soon stop accepting submissions in our Letter format.

    Editorial

Ultracold quantum technologies

The impressive achievements made with quantum gases rely on continuous improvements in the underlying methods.
Insight

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