Our papers on the rf spectroscopy of impurities have now been published here:
Weizhe Edward Liu, Zhe-Yu Shi, Jesper Levinsen, and Meera M. Parish, Radio-frequency response and contact of impurities in a quantum gas, Phys. Rev. Lett. 125, 065301 (2020).
Weizhe Edward Liu, Zhe-Yu Shi, Meera M. Parish, and Jesper Levinsen, Theory of radio-frequency spectroscopy of impurities in quantum gases, Phys. Rev. A 102, 023304 (2020).
