Exotic atoms and molecules

Exotic atoms and molecules are forms of basic matter in which one subatomic particle is replaced by another with the same charge. For instance, an electron can be replaced with a muon, a pion or an antiproton. Positronium is made by swapping the proton in a hydrogen atom for a positron.

Latest Research and Reviews

  • Research | | open

    Octupole deformation in nuclei is important to understand nuclear structure and electric dipole moments of heavy atoms. Here the authors measure energies of excited quantum states in radon isotopes and find that these isotopes do not provide favourable conditions in the search for CP-violation.

    • P. A. Butler
    • , L. P. Gaffney
    • , P. Spagnoletti
    • , J. Konki
    • , M. Scheck
    • , J. F. Smith
    • , K. Abrahams
    • , M. Bowry
    • , J. Cederkäll
    • , T. Chupp
    • , G. de Angelis
    • , H. De Witte
    • , P. E. Garrett
    • , A. Goldkuhle
    • , C. Henrich
    • , A. Illana
    • , K. Johnston
    • , D. T. Joss
    • , J. M. Keatings
    • , N. A. Kelly
    • , M. Komorowska
    • , T. Kröll
    • , M. Lozano
    • , B. S. Nara Singh
    • , D. O’Donnell
    • , J. Ojala
    • , R. D. Page
    • , L. G. Pedersen
    • , C. Raison
    • , P. Reiter
    • , J. A. Rodriguez
    • , D. Rosiak
    • , S. Rothe
    • , T. M. Shneidman
    • , B. Siebeck
    • , M. Seidlitz
    • , J. Sinclair
    • , M. Stryjczyk
    • , P. Van Duppen
    • , S. Vinals
    • , V. Virtanen
    • , N. Warr
    • , K. Wrzosek-Lipska
    •  & M. Zielinska
  • Research | | open

    The nonlinear interaction between terahertz frequency electric fields and atoms or molecules can be used to study fundamental and technical problems. Here the authors demonstrate a THz–driven phase transition, with a potential application as a THz sensor, using Rydberg atomic states in a cesium vapor.

    • C. G. Wade
    • , M. Marcuzzi
    • , E. Levi
    • , J. M. Kondo
    • , I. Lesanovsky
    • , C. S. Adams
    •  & K. J. Weatherill
  • Research | | open

    The observation of the 1S–2P Lyman-α transition in the antihydrogen atom, the antimatter counterpart of hydrogen, is reported.

    • M. Ahmadi
    • , B. X. R. Alves
    • , C. J. Baker
    • , W. Bertsche
    • , A. Capra
    • , C. Carruth
    • , C. L. Cesar
    • , M. Charlton
    • , S. Cohen
    • , R. Collister
    • , S. Eriksson
    • , A. Evans
    • , N. Evetts
    • , J. Fajans
    • , T. Friesen
    • , M. C. Fujiwara
    • , D. R. Gill
    • , J. S. Hangst
    • , W. N. Hardy
    • , M. E. Hayden
    • , E. D. Hunter
    • , C. A. Isaac
    • , M. A. Johnson
    • , J. M. Jones
    • , S. A. Jones
    • , S. Jonsell
    • , A. Khramov
    • , P. Knapp
    • , L. Kurchaninov
    • , N. Madsen
    • , D. Maxwell
    • , J. T. K. McKenna
    • , S. Menary
    • , J. M. Michan
    • , T. Momose
    • , J. J. Munich
    • , K. Olchanski
    • , A. Olin
    • , P. Pusa
    • , C. Ø. Rasmussen
    • , F. Robicheaux
    • , R. L. Sacramento
    • , M. Sameed
    • , E. Sarid
    • , D. M. Silveira
    • , D. M. Starko
    • , G. Stutter
    • , C. So
    • , T. D. Tharp
    • , R. I. Thompson
    • , D. P. van der Werf
    •  & J. S. Wurtele
    Nature 561, 211-215
  • Research |

    Laser cooling of optically trapped diatomic molecules CaF to sub-Doppler temperatures has been achieved. The technique provides an alternative approach towards the production of ultracold polar molecules.

    • Loïc Anderegg
    • , Benjamin L. Augenbraun
    • , Yicheng Bao
    • , Sean Burchesky
    • , Lawrence W. Cheuk
    • , Wolfgang Ketterle
    •  & John M. Doyle
    Nature Physics 14, 890-893
  • Reviews | | open

    Rydberg molecules have been extensively studied both theoretically and experimentally. Here the authors review the recent developments in the study of various types of Rydberg molecules and their potential for future applications in spectroscopy, sensing and quantum information.

    • J. P. Shaffer
    • , S. T. Rittenhouse
    •  & H. R. Sadeghpour

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