Excited rotational states of molecules in a superfluid

article Excited rotational states of molecules in a superfluid published yes Igor Cherepanov author 339C7E5A-F248-11E8-B48F-1D18A9856A87 Giacomo Bighin author 4CA96FD4-F248-11E8-B48F-1D18A9856A870000-0001-8823-9777 Constant A. Schouder author Adam S. Chatterley author Simon H. Albrechtsen author Alberto Viñas Muñoz author Lars Christiansen author Henrik Stapelfeldt author Mikhail Lemeshko author 37CB05FA-F248-11E8-B48F-1D18A9856A870000-0002-6990-7802 MiLe department Quantum rotations in the presence of a many-body environment project Angulon: physics and applications of a new quasiparticle project International IST Doctoral Program project A path-integral approach to composite impurities project We combine experimental and theoretical approaches to explore excited rotational states of molecules embedded in helium nanodroplets using CS2 and I2 as examples. Laser-induced nonadiabatic molecular alignment is employed to measure spectral lines for rotational states extending beyond those initially populated at the 0.37 K droplet temperature. We construct a simple quantum-mechanical model, based on a linear rotor coupled to a single-mode bosonic bath, to determine the rotational energy structure in its entirety. The calculated and measured spectral lines are in good agreement. We show that the effect of the surrounding superfluid on molecular rotation can be rationalized by a single quantity, the angular momentum, transferred from the molecule to the droplet. American Physical Society2021 eng Physical Review A 2469-9926 2469-9934 2107.00468 00073961830000110.1103/PhysRevA.104.L061303 1046 Cherepanov, Igor, et al. “Excited Rotational States of Molecules in a Superfluid.” Physical Review A, vol. 104, no. 6, L061303, American Physical Society, 2021, doi:<a href="https://doi.org/10.1103/PhysRevA.104.L061303">10.1103/PhysRevA.104.L061303</a>. Cherepanov I, Bighin G, Schouder CA, et al. Excited rotational states of molecules in a superfluid. Physical Review A. 2021;104(6). doi:<a href="https://doi.org/10.1103/PhysRevA.104.L061303">10.1103/PhysRevA.104.L061303</a> I. Cherepanov et al., “Excited rotational states of molecules in a superfluid,” Physical Review A, vol. 104, no. 6. American Physical Society, 2021. Cherepanov, Igor, Giacomo Bighin, Constant A. Schouder, Adam S. Chatterley, Simon H. Albrechtsen, Alberto Viñas Muñoz, Lars Christiansen, Henrik Stapelfeldt, and Mikhail Lemeshko. “Excited Rotational States of Molecules in a Superfluid.” Physical Review A. American Physical Society, 2021. <a href="https://doi.org/10.1103/PhysRevA.104.L061303">https://doi.org/10.1103/PhysRevA.104.L061303</a>. Cherepanov, I., Bighin, G., Schouder, C. A., Chatterley, A. S., Albrechtsen, S. H., Muñoz, A. V., … Lemeshko, M. (2021). Excited rotational states of molecules in a superfluid. Physical Review A. American Physical Society. <a href="https://doi.org/10.1103/PhysRevA.104.L061303">https://doi.org/10.1103/PhysRevA.104.L061303</a> Cherepanov I, Bighin G, Schouder CA, Chatterley AS, Albrechtsen SH, Muñoz AV, Christiansen L, Stapelfeldt H, Lemeshko M. 2021. Excited rotational states of molecules in a superfluid. Physical Review A. 104(6), L061303. I. Cherepanov, G. Bighin, C.A. Schouder, A.S. Chatterley, S.H. Albrechtsen, A.V. Muñoz, L. Christiansen, H. Stapelfeldt, M. Lemeshko, Physical Review A 104 (2021). 106312022-01-16T23:01:29Z2025-03-31T16:00:55Z