Theoretical study of the spectral shift of the absorption line of Rb and Cs in liquid helium

- Theoretical analysis of first s → p transition of Rb and Cs in liquid He.
- Combination of Monte Carlo and TD-DFT calculations include thermodynamic condition.
- Two alkaline-He potentials are used in the Monte Carlo simulations.
- Spectral shifts and widths are well described in explicit liquid He environment.
- Calculations are made using different DFT functional giving a consistent picture.