Mixing of 0(+) and 0(-) observed in the hyperfine and Zeeman structure of ultracold Rb-2 molecules

摘要: We study the combination of hyperfine and Zeeman structure in spin–orbit coupled complex . For this purpose, absorption spectroscopy at a magnetic field around G is carried out. drive optical dipole transitions from lowest rotational state an ultracold Feshbach molecule to various vibrational levels with symmetry complex. In contrast previous measurements rotationally excited alkali-dimers, we do not observe equal spacings levels. addition, spectra vary substantially for different quantum numbers, exhibit large splittings up MHz, unexpected states. The level explained be result repulsion between states , via interactions. general, have induced energy spacing Δ, that individual From each measured spectrum are able extract which otherwise easily accessible conventional schemes. obtain values Δ range GHz can described by channel calculations if coupling introduced