Ultracold Metastable Helium: Ramsey Fringes and Atom Interferometry

Vassen, W.; Notermans, Remy; Rengelink, R. J.; Beek, R. F. H. J. van der

doi:10.1007/978-3-319-64346-5_32

Cited by 1 publication

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“…The helium atom interferometer [ 83 ] was among the first experiments in atom interferometry, and the study is still evolving, playing an essential role in testing basic quantum mechanics [ 84 , 85 ]. The use of helium atomic interference will also allow independent high-precision measurement of the fine-structure constant through the recoil velocity measurement ( h / M ) [ 86 ].…”

Section: Othersmentioning

confidence: 99%

Precision spectroscopy of atomic helium

Sun

2020

National Science Review

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Helium is a prototype three-body system and has long been a model system for developing quantum mechanics theory and computational methods. The fine structure splitting in the 23P state of helium is considered to be the most suitable for determining the fine structure constant α in atoms. After more than 50 years of efforts by many theorists and experimentalists, now we are working toward a determination of α with an accuracy of a few parts per billion, which can be compared to the results obtained by entirely different methods to verify the self-consistency of QED. Moreover, the precision spectroscopy of helium allows determination of the nuclear charge radius, and it is expected to help resolve the “proton radius puzzle”. In this review, we introduce the latest developments in the precision spectroscopy of the helium atom, especially the discrepancies among theoretical and experimental results, and give an outlook on future progress.

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Section: Othersmentioning

confidence: 99%

Precision spectroscopy of atomic helium

Sun

2020

National Science Review

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Ultracold Metastable Helium: Ramsey Fringes and Atom Interferometry

Cited by 1 publication

References 37 publications

Precision spectroscopy of atomic helium

Precision spectroscopy of atomic helium

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