Long range interactions of ytterbium in mixed quantum gases

TL;DR

This paper develops methods for accurately calculating van der Waals coefficients in mixed quantum gases involving excited ytterbium atoms, accounting for decay channels and uncertainties.

Contribution

It introduces new computational techniques for evaluating van der Waals coefficients in systems with excited atoms and decay channels, with uncertainty quantification.

Findings

Calculated C_6 coefficients for various Yb-Yb and Yb-Rb dimers.

Calculated C_8 coefficients for selected Yb-Yb and Yb-Rb dimers.

Provided uncertainty estimates for all computed properties.

Abstract

We present methods for accurate evaluation of van der Waals coefficients of dimers with excited atoms that have a strong decay channel. We calculate C_6 coefficients for the Yb-Yb 1S_0+ 3P_{0,1}, 3P_0+3P_0 and Yb-Rb 3P_1+5s, 1S_0+ 5p_{1/2} dimers and C_8 coefficients for the Yb-Yb 1S_0+1S_0, 1S_0+3P_1 and Yb-Rb 1S_0+5s dimers. We evaluate uncertainties of all properties.