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Volume 15 Issue 11, November 2019

Volume 15 Issue 11

Odd viscosity

A chiral fluid comprising spinning colloidal magnets exhibits macroscopic dynamics reminiscent of the free surface flows of Newtonian fluids, together with unique features suggestive of Hall—or odd—viscosity.

See Irvine et al.

Image: Vishal Soni, Ephraim Bililign, Sofia Magkiriadou, University of Chicago. Cover Design: David Shand

Editorial

  • Editorial |

    Half of the 2019 Nobel Prize in Physics was awarded to James Peebles “for theoretical discoveries in physical cosmology” and the other half is shared by Michel Mayor and Didier Queloz “for the discovery of an exoplanet orbiting a solar-type star”.

  • Editorial |

    The demonstration of a quantum computational advantage is a milestone worth celebrating.

Thesis

Research Highlights

News & Views

  • News & Views |

    Two independent cold-atom experiments have demonstrated the building blocks for the quantum simulation of dynamical gauge fields — an advance that holds promise for our understanding of computationally intractable problems in high-energy physics.

    • Cheng Chin
  • News & Views |

    Spatially resolved measurements of twisted bilayer graphene reveal more details of the strongly correlated electrons.

    • Adina Luican-Mayer
  • News & Views |

    The demonstration of high-resolution spectroscopy of Sr2 molecules trapped in an optical lattice at the ‘magic’ wavelength opens the way to precision control of molecular excitations.

    • Nicola Poli
  • News & Views |

    A model fluid comprising rotating magnetic particles behaves according to the equations of hydrodynamics, but for a few key differences due to broken mirror symmetry. The resulting active chiral fluid is characterized by parity-odd Hall viscosity.

    • Alexander Abanov
  • News & Views |

    A statistical analysis of data from ultra-relativistic heavy-ion collisions has uncovered the specific viscosities of the quark–gluon plasma — suggesting that the hottest matter in the current Universe behaves like a near-perfect fluid.

    • Kari J. Eskola

Letters

Articles

  • Article |

    An effective Hamiltonian exhibiting $${\Bbb Z}_2$$ Z 2 symmetry has been engineered by implementing a Floquet-based method on ultracold bosons in an optical lattice, providing a first step towards quantum simulation of $${\Bbb Z}_2$$ Z 2 lattice gauge theories with ultracold matter.

    • Christian Schweizer
    • , Fabian Grusdt
    •  & Monika Aidelsburger
  • Article |

    Scanning tunnelling microscopy shows that electrons in twisted bilayer graphene are strongly correlated for a wide range of density. In particular, a correlated regime appears near charge neutrality and theory suggests nematic ordering.

    • Youngjoon Choi
    • , Jeannette Kemmer
    •  & Stevan Nadj-Perge
  • Article |

    A chiral fluid comprising spinning colloidal magnets exhibits macroscopic dynamics reminiscent of the free surface flows of Newtonian fluids, together with unique features suggestive of Hall—or odd—viscosity.

    • Vishal Soni
    • , Ephraim S. Bililign
    •  & William T. M. Irvine
  • Article |

    An observation that cells at the edge of a healing wound readily undergo intercalation leads to the finding that tissue fluidity is crucial for effective wound closure.

    • Robert J. Tetley
    • , Michael F. Staddon
    •  & Yanlan Mao

Amendments & Corrections

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