Molecular hydrogen ions, the simplest molecules in nature, constitute a benchmark system for tests of quantum electrodynamics in complex forms of matter. Here, the authors report on a laser spectroscopic frequency measurement of a transition in HD+in agreement with theory within 0.6 (1.1) part-per-billion.
- J. Biesheuvel
- J.-Ph. Karr
- J. C. J. Koelemeij
