Exotic atoms and molecules articles within Nature

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  • Article
    | Open Access

    Ultracold polyatomic molecules can be created by electroassociation in a degenerate Fermi gas of microwave-dressed polar molecules through a field-linked resonance.

    • Xing-Yan Chen
    • , Shrestha Biswas
    •  & Xin-Yu Luo

  • Article
    | Open Access

    A high-precision, high-field test of quantum electrodynamics measuring the bound-electron g factor in hydrogen-like tin is described, which—together with state-of-the-art theory calculations—yields a stringent test in the strong-field regime.

    • J. Morgner
    • , B. Tu
    •  & K. Blaum

  • Article
    | Open Access

    Magnetically confined neutral antihydrogen atoms released in a gravity field were found to fall towards Earth like ordinary matter, in accordance with Einstein’s general theory of relativity.

    • E. K. Anderson
    • , C. J. Baker
    •  & J. S. Wurtele

  • Article
    | Open Access

    A type of universal scattering resonance between ultracold microwave-dressed polar molecules associated with field-linked tetramer bound states in the long-range potential well is observed, providing a general strategy for resonant scattering between ultracold polar molecules.

    • Xing-Yan Chen
    • , Andreas Schindewolf
    •  & Xin-Yu Luo

  • Article
    | Open Access

    A many-body theory of binding interactions between positrons and polar and nonpolar molecules is developed, showing agreement with experimental data up to within 1%.

    • Jaroslav Hofierka
    • , Brian Cunningham
    •  & Dermot G. Green

  • Article |

    Multiple high-precision measurement campaigns at CERN of the antiproton-to-proton charge-to-mass ratio—to a precision of 16 parts per trillion—in a cryogenic multi-Penning trap offer no evidence of charge–parity–time violation, and set stringent limits on the clock-weak-equivalence principle.

    • M. J. Borchert
    • , J. A. Devlin
    •  & S. Ulmer

  • Article
    | Open Access

    A single electromagnetically trapped proton is sympathetically cooled to below ambient temperature by coupling it through a superconducting LC circuit to a laser-cooled cloud of Be+ ions stored in a spatially separated trap.

    • M. Bohman
    • , V. Grunhofer
    •  & S. Ulmer

  • Article
    | Open Access

    The successful laser cooling of trapped antihydrogen, the antimatter atom formed by an antiproton and a positron (anti-electron), is reported.

    • C. J. Baker
    • , W. Bertsche
    •  & J. S. Wurtele

  • Article
    | Open Access

    The 2S–2P transitions in muonic helium-4 ions are measured using laser spectroscopy and used to obtain an α-particle charge-radius value five times more precise than that from electron scattering.

    • Julian J. Krauth
    • , Karsten Schuhmann
    •  & Franz Kottmann

  • Article
    | Open Access

    Measurements of low-energy electronic states of radium monofluoride validate predictions of the use of this short-lived radioactive molecule in exploring fundamental physics and provide evidence of its suitability for laser cooling.

    • R. F. Garcia Ruiz
    • , R. Berger
    •  & X. F. Yang

  • Article |

    Long-lived pionic helium atoms (composed of a helium-4 nucleus, an electron and a negatively charged pion) are synthesized in a superfluid-helium target, as confirmed by laser spectroscopy involving the pion-occupied orbitals.

    • Masaki Hori
    • , Hossein Aghai-Khozani
    •  & Daniel Barna

  • Article |

    Precision measurements of the 1S–2P transition in antihydrogen that take into account the standard Zeeman and hyperfine effects confirm the predictions of quantum electrodynamics.

    • M. Ahmadi
    • , B. X. R. Alves
    •  & J. S. Wurtele

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