Acoustics articles within Nature Physics

Featured

  • News & Views |

    Acoustic waveguides have been used to implement the long-theorized phenomenon of non-Abelian braiding, in which abstract geometric constructions are used to generate transformations between different modes.

    • Yidong Chong

  • Article |

    Although it shows promise for applications, non-Abelian braiding is difficult to realize in electronic systems. Its demonstration using acoustic waveguides may provide a useful platform to study non-Abelian physics.

    • Ze-Guo Chen
    • , Ruo-Yang Zhang
    •  & Guancong Ma

  • News & Views |

    Introducing non-local effects to metamaterials increases the complexity of their dispersion relation, which allows carefully designed elastic structures to mimic the peculiar roton behaviour of correlated quantum superfluids.

    • Romain Fleury

  • Perspective |

    The interplay of topological properties and non-Hermitian symmetry breaking has been implemented for a range of classical-wave systems. Recent advances, challenges and opportunities are reviewed across the different physical platforms.

    • Corentin Coulais
    • , Romain Fleury
    •  & Jasper van Wezel

  • Measure for Measure |

    In first-century China, emperor Wang Mang standardized weights and measures in his newly established dynasty. Noa Hegesh tells the story of sound as the basis for this standardization.

    • Noa Hegesh

  • News & Views |

    An elegant experiment showing that acoustic waves are amplified after scattering by a rotating body demonstrates an effect predicted in 1971 by Yakov Zel’dovich. This result has implications for the understanding of scattering from black holes.

    • Bruce W. Drinkwater

  • Article |

    Acoustic waves that carry orbital angular momentum are amplified as they pass through an absorbing disk when the rotation rate exceeds the frequency of the incident wave, thus providing an experimental demonstration of Zel’dovich amplification.

    • Marion Cromb
    • , Graham M. Gibson
    •  & Daniele Faccio

  • Measure for Measure |

    The note A tuned to 440 Hz only became the norm for musical performance in 1939 after decades of international and interdisciplinary disputes. Fanny Gribenski retraces this rocky path.

    • Fanny Gribenski

  • Letter |

    In acoustic metamaterials, unconventional chiral quasiparticles exhibit multifold band degeneracy points, each carrying non-zero topological charges, giving rise to the topologically protected negative surface refraction.

    • Yihao Yang
    • , Hong-xiang Sun
    •  & Baile Zhang

  • Letter |

    Axial fields couple to the states of different chiralities with opposite signs. In an acoustic Weyl system, the implementation of such fields induces chiral Landau levels, which is now observed experimentally.

    • Valerio Peri
    • , Marc Serra-Garcia
    •  & Sebastian D. Huber

  • Article |

    Perfect transmission of sound waves through a strongly disordered environment is demonstrated using a set of speakers that provide exactly the right input to counteract scattering by the disorder. These principles can also be applied to light.

    • Etienne Rivet
    • , Andre Brandstötter
    •  & Romain Fleury

  • Letter |

    Acoustic Weyl points are realized in a three-dimensional chiral phononic crystal that breaks inversion symmetry, with the topological nature of the associate surface states providing robust modes that propagate along only one direction.

    • Feng Li
    • , Xueqin Huang
    •  & Zhengyou Liu

  • Letter |

    Valleytronics — exploiting a system’s pseudospin degree of freedom — is being increasingly explored in sonic crystals. Now, valley transport of sound is reported for a macroscopic triangular-lattice array of rod-like scatterers in a 2D air waveguide.

    • Jiuyang Lu
    • , Chunyin Qiu
    •  & Zhengyou Liu

  • Letter |

    The acoustic analogue of a topological insulator is shown: a metamaterial exhibiting one-way sound transport along its edge. The system — a graphene-like array of stainless-steel rods — is a promising new platform for exploring topological phenomena.

    • Cheng He
    • , Xu Ni
    •  & Yan-Feng Chen

  • Research Highlights |

    • Luke Fleet

  • News & Views |

    Three-dimensional rogue waves have been observed in a dusty-plasma system, which provides a wave–particle interaction view on their formation.

    • Jeremiah Williams

  • Letter |

    Realizing non-trivial topological effects is challenging in acoustic systems. It is now shown that inversion symmetry breaking can be used to create acoustic analogues of the topological Haldane model.

    • Meng Xiao
    • , Wen-Jie Chen
    •  & C. T. Chan

  • Research Highlights |

    • Bart Verberck

  • News & Views |

    Electrons moving in a one-dimensional crystal can acquire a geometrical phase. Sound waves in phononic crystals are now shown to display the same effect — underlining the similarity between conventional solids and acoustic metamaterials.

    • Julio T. Barreiro

  • Letter |

    The behaviour of sound waves in phononic crystals—metamaterials with spatially varying acoustic characteristics—is similar to that of electrons in solids. Now, phononic band inversion and Zak phases have been measured for a 1D phononic system.

    • Meng Xiao
    • , Guancong Ma
    •  & C. T. Chan

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