- Accepted Paper
Adiabatic passage of TlF with microwaves in a cryogenic beam
Phys. Rev. A - Accepted 13 November, 2026
DOI: https://doi.org/10.1103/gkks-9cjv
Phys. Rev. A - Accepted 13 November, 2026
DOI: https://doi.org/10.1103/gkks-9cjv
We present a hyperfine-resolved state transfer scheme for thallium fluoride (TlF) molecules, based on microwave-driven adiabatic passage (AP) in a spatially varying electric field. This method enables population transfer between selected hyperfine sublevels of the ground state in a cryogenic molecular beam, a key requirement for the CeNTREX search for nuclear time-reversal symmetry violation. Two sequential stages of AP are implemented. The first transfers population from to , and the second transfers from to . Transfer efficiencies are quantified through laser-induced fluorescence. We achieve a total efficiency of for population transfer from to , where the uncertainty represents a statistical interval. These results demonstrate robust and high-fidelity preparation of specific rotational/hyperfine states in TlF.
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