Trapped antihydrogen in its ground state.

@article{Gabrielse2012TrappedAI,
  title={Trapped antihydrogen in its ground state.},
  author={G. Gabrielse and R. Kalra and W. Steven Kolthammer and Robert McConnell and Philip Richerme and Dieter Grzonka and Walter Oelert and Th. Sefzick and Marcin Zielinski and D. W. Fitzakerley and Matthew C. George and E A Hessels and C. H. Storry and Matthew Weel and Andreas M{\"u}llers and Jochen Walz},
  journal={Physical review letters},
  year={2012},
  volume={108 11},
  pages={
          113002
        }
}
Antihydrogen atoms (H¯) are confined in an Ioffe trap for 15-1000 s-long enough to ensure that they reach their ground state. Though reproducibility challenges remain in making large numbers of cold antiprotons (p¯) and positrons (e(+)) interact, 5±1 simultaneously confined ground-state atoms are produced and observed on average, substantially more than previously reported. Increases in the number of simultaneously trapped H¯ are critical if laser cooling of trapped H¯ is to be demonstrated and… Expand
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