2014/02/07 by S. Schiller, Schiller, Stephan, D. Bakalov +3
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Quantum Mechanics and Applications #Radioactive Decay and Measurement Techniques
paper · pdf · doi:10.48550/arxiv.1402.1789
openalex publication_date 2014/02/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The precise measurement of transition frequencies in cold, trapped molecules has applications in fundamental physics, and extremely high accuracies are desirable. We determine suitable candidates by considering simple molecules with a single electron, for which the external-field shift coefficients can be calculated with high precision. Our calculations show that \Htwop exhibits particular transitions whose fractional uncertainties may reach 2×10-17 at room temperature. We also generalize the method of composite frequencies, introducing tailored linear combinations of individual transition frequencies that are free of the major systematic shifts, independent of the strength of the external perturbing fields. By applying this technique, the uncertainty should be reduced to the 10-18 range for both \Htwop and \HDp. Thus, the theoretical results demonstrate that these molecules are of metrological relevance for future studies.