M. Fischer

most citedNew Limits to the Drift of Fundamental Constants from Laboratory Measurements

432 citations · 604 across the 4 of their papers we have counts for

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physics.atom-ph2003★ 100 cited

Precision Spectroscopy of Atomic Hydrogen and Variations of Fundamental Constants

M. Fischer, N. Kolachevsky, M. Zimmermann +14

In 2003 we have measured the absolute frequency of the $(1 S, F = 1, m_{F} = \pm 1) \leftrightarrow (2 S, F^{'} = 1, m_{F}^{'} = \pm 1)$ two-photon transition in atomic hydrogen. We observed a variati…

physics.atom-ph2003★ 61 cited

High-Precision Optical Measurement of the 2S Hyperfine Interval in Atomic Hydrogen

N. Kolachevsky, M. Fischer, S. G. Karshenboim +1

We have applied an optical method to the measurement of the 2S hyperfine interval in atomic hydrogen. The interval has been measured by means of two-photon spectroscopy of the 1S-2…