Browse Articles

  • Article |

    Wrinkling in human brain organoids suggests that brain development may be mechanically driven, a notion supported only by model gels so far. Evidence in this simple living system highlights roles for cytoskeletal contraction and nuclear expansion.

    • Eyal Karzbrun
    • , Aditya Kshirsagar
    • , Sidney R. Cohen
    • , Jacob H. Hanna
    •  & Orly Reiner
  • Article |

    Photoexcitation circular dichroism generates an ultrafast response in chiral molecules, with a much higher sensitivity than standard circular dichroism.

    • S. Beaulieu
    • , A. Comby
    • , D. Descamps
    • , B. Fabre
    • , G. A. Garcia
    • , R. Géneaux
    • , A. G. Harvey
    • , F. Légaré
    • , Z. Mašín
    • , L. Nahon
    • , A. F. Ordonez
    • , S. Petit
    • , B. Pons
    • , Y. Mairesse
    • , O. Smirnova
    •  & V. Blanchet
  • Article |

    Canonical pattern formation relies on a system being close to an instability and stabilized by nonlinearities — but real systems seldom conform to these conditions. A new theory solves the problem by recasting it in terms of moving local equilibria.

    • J. Halatek
    •  & E. Frey
  • News & Views |

    The folded structure of the human brain is a hallmark of our intelligence — an optimized packing of neurons into a confined space. Similar wrinkling in brain-on-a-chip experiments provides a way of understanding the physics of how this occurs.

    • Larry A. Taber
  • Letter |

    Nodal chains are observed for the first time in a photonic crystal with accompanying drumhead surface states. This will stimulate further study of topological nodal lines with non-trivial connectivity.

    • Qinghui Yan
    • , Rongjuan Liu
    • , Zhongbo Yan
    • , Boyuan Liu
    • , Hongsheng Chen
    • , Zhong Wang
    •  & Ling Lu
  • News & Views |

    An ultracold mixture of Bose gases is eight orders of magnitude more dilute than water. However, quantum fluctuations turn it into a self-bound liquid droplet.

    • Dmitry S. Petrov
  • Letter |

    An atomic clock has been deployed on a field measurement campaign to determine the height of a mountain location 1,000 m above sea level, returning a value that is in good agreement with state-of-the-art geodesy.

    • Jacopo Grotti
    • , Silvio Koller
    • , Stefan Vogt
    • , Sebastian Häfner
    • , Uwe Sterr
    • , Christian Lisdat
    • , Heiner Denker
    • , Christian Voigt
    • , Ludger Timmen
    • , Antoine Rolland
    • , Fred N. Baynes
    • , Helen S. Margolis
    • , Michel Zampaolo
    • , Pierre Thoumany
    • , Marco Pizzocaro
    • , Benjamin Rauf
    • , Filippo Bregolin
    • , Anna Tampellini
    • , Piero Barbieri
    • , Massimo Zucco
    • , Giovanni A. Costanzo
    • , Cecilia Clivati
    • , Filippo Levi
    •  & Davide Calonico
  • Article |

    Turbulence is seldom confined by boundaries that are perfectly smooth, but wall roughness is usually ignored. A study of flows between rotating cylinders suggests that roughness enhances turbulent transport and alters its scaling behaviour.

    • Xiaojue Zhu
    • , Ruben A. Verschoof
    • , Dennis Bakhuis
    • , Sander G. Huisman
    • , Roberto Verzicco
    • , Chao Sun
    •  & Detlef Lohse
  • News & Views |

    Bringing next-generation atomic clocks out of the lab is not an easy task, but doing so will unlock many new possibilities. As a crucial first step, a portable atomic clock has now been deployed for relativistic geodesy measurements in the Alps.

    • Andrew D. Ludlow
  • Letter |

    Coupling strengths differ between neighbours in square artificial spin ices, resulting in the loss of degeneracy. Introducing mesospins on vertices of the array alleviates this problem, by tuning the strength and ratio of the interaction energies.

    • Erik Östman
    • , Henry Stopfel
    • , Ioan-Augustin Chioar
    • , Unnar B. Arnalds
    • , Aaron Stein
    • , Vassilios Kapaklis
    •  & Björgvin Hjörvarsson
  • News & Views |

    The ultimate regime of turbulence has been observed, more than half a century after its first prediction. Inspiration for achieving this technical feat came from the imperfections of an everyday pipe.

    • Alexander J. Smits
  • Article |

    A large-scale density matrix renormalization group study of the dipolar Heisenberg model reveals evidence for quantum spin liquid ground states on both triangular and kagome lattices.

    • N. Y. Yao
    • , M. P. Zaletel
    • , D. M. Stamper-Kurn
    •  & A. Vishwanath
  • Article |

    Many-body effects in an interacting spin-orbit coupled Fermi gas are studied with the help of clock spectroscopy. The results provide a simple view of how strong collective dynamics arise from local interactions in the presence of spin–orbit coupling.

    • S. L. Bromley
    • , S. Kolkowitz
    • , T. Bothwell
    • , D. Kedar
    • , A. Safavi-Naini
    • , M. L. Wall
    • , C. Salomon
    • , A. M. Rey
    •  & J. Ye
  • Article |

    Although predicted to occur in planetary interiors, superionic water ice has proved elusive to identify experimentally. Laser-driven shock-compression experiments on water ice VII now verify its existence.

    • Marius Millot
    • , Sebastien Hamel
    • , J. Ryan Rygg
    • , Peter M. Celliers
    • , Gilbert W. Collins
    • , Federica Coppari
    • , Dayne E. Fratanduono
    • , Raymond Jeanloz
    • , Damian C. Swift
    •  & Jon H. Eggert
  • Correspondence |

    • I. R. Mann
    • , L. G. Ozeke
    • , S. K. Morley
    • , K. R. Murphy
    • , S. G. Claudepierre
    • , D. L. Turner
    • , D. N. Baker
    • , I. J. Rae
    • , A. Kale
    • , D. K. Milling
    • , A. J. Boyd
    • , H. E. Spence
    • , H. J. Singer
    • , S. Dimitrakoudis
    • , I. A. Daglis
    •  & F. Honary
  • News & Views |

    A generalization of the Kapitza–Dirac effect enables new ways of controlling free electrons with ultrashort light pulses.

    • Benoit Chalopin
    •  & Arnaud Arbouet
  • Measure for Measure |

    A nuclear clock could outperform atomic clocks, but its development has turned out to be a formidable task, writes Marianna Safronova.

    • Marianna Safronova