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Volume 13 Issue 6, June 2017

An enhanced production of particles containing strange quarks has been discovered in proton–proton collisions at the LHC by the ALICE Collaboration. The enhancement depends on the strangeness content of the hadrons and grows with the number of charged particles produced, behaviour that may be connected to the formation of a primordial state of matter. Letter p535; News & Views p531 IMAGE: DAVID DOBRIGKEIT CHINELLATO, UNIVERSIDADE ESTADUAL DE CAMPINAS (UNICAMP), BRAZIL COVER DESIGN: BETHANY VUKOMANOVIC

Editorial

  • Some Springer Nature journals, including Nature Physics, are mandating Open Researcher and Contributor IDs (ORCIDs) for the corresponding authors of accepted papers. We provide some context to this initiative.

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Correspondence

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Commentary

  • INSPIRE, the central information resource of the high-energy physics community, pioneered the open dissemination of scientific literature. It has been evolving to keep up with the new technologies and it is not slowing down.

    • Bernard L. Hecker
    Commentary
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Thesis

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Books & Arts

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Research Highlights

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News & Views

  • While axions remain elusive, the CERN Axion Solar Telescope has now reached the interesting region where physics beyond the standard model could be glimpsed.

    • Maurizio Giannotti
    News & Views
  • An enhanced production of particles with strange quarks has been observed in high-multiplicity proton–proton collisions — an important clue to understand how strange quarks form, and perhaps a hint of the quark–gluon plasma.

    • Francesco Becattini
    News & Views
  • Topological concepts have been demonstrated in microwave photonic systems but laser-written waveguides show the way to topological physics for light at optical frequencies.

    • Alexander B. Khanikaev
    News & Views
  • Improved-accuracy measurements of the ground-state hyperfine splitting in highly charged bismuth ions reveal a surprising discrepancy with the predictions of quantum electrodynamics.

    • Jean-Philippe Karr
    News & Views
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Letter

  • Using two entangled optical beams and post-selection, a single photon can have the same effect as eight photons in terms of the induced phase shift. This example illustrates the power of the so-called weak-value amplification.

    • Matin Hallaji
    • Amir Feizpour
    • Aephraim M. Steinberg
    Letter
  • With the help of a quantum simulator and Bayesian inference it is possible to determine the unknown Hamiltonian of a quantum system. An experiment demonstrates this using a photonic quantum simulator and a solid-state system.

    • Jianwei Wang
    • Stefano Paesani
    • Mark G. Thompson
    Letter
  • When the entropy of a system scales as a function of its surface area, rather than its volume, it is said to obey an entropy area law. Now, an area law is shown to exist numerically in the entanglement entropy of superfluid helium.

    • C. M. Herdman
    • P.-N. Roy
    • A. Del Maestro
    Letter
  • Electrical rectification is usually achieved by layering p-type and n-type materials, but experiments now demonstrate rectification in a bulk polar semiconductor that has inversion-symmetry breaking and strong Rashba spin–orbit coupling.

    • T. Ideue
    • K. Hamamoto
    • Y. Iwasa
    Letter
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Article

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Measure for Measure

  • Stephan Schlamminger looks at the origins of the Planck constant and its current role in redefining the kilogram.

    • Stephan Schlamminger
    Measure for Measure
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