Polarizabilities and tune-out wavelengths of the hyperfine ground states of $^{87,85}$Rb

TL;DR

This paper calculates the polarizabilities and tune-out wavelengths of ground and hyperfine states of rubidium isotopes using a relativistic approach, providing precise theoretical values that agree with experimental data.

Contribution

It presents new high-precision calculations of tune-out wavelengths for hyperfine states of $^{87}$Rb and $^{85}$Rb, including magnetic sublevel effects, using the RCICP method.

Findings

First primary tune-out wavelengths for $^{87}$Rb hyperfine states are 790.018187(193) nm and 790.032602(193) nm.

Calculated tune-out wavelengths for $^{85}$Rb hyperfine states are 790.023515(218) nm and 790.029918(218) nm.

Results agree well with recent high-precision measurements.

Abstract

The static and dynamic polarizabilities, and the tune-out wavelengths of the ground state of Rb and the hyperfine ground states of $^{87, 85}$Rb have been calculated by using relativistic configuration interaction plus core polarization(RCICP) approach. It is found that the first primary tune-out wavelengths of the $ 5s_{1/2}, F=1, 2 $ states of $ ^{87}$Rb are 790.018187(193) nm and 790.032602(193) nm severally, where the calculated result for the $ 5s_{1/2}, F=2 $ state is in good agreement with the latest high-precision measurement 790.032388(32) nm [Phys. Rev. A 92, 052501 (2015)]. Similarly, the first primary tune-out wavelengths of the $ 5s_{1/2}, F=2, 3 $ states of $^{85}$Rb are 790.023515(218) nm and 790.029918(218) nm respectively. Furthermore, the tune-out wavelengths for the different magnetic sublevels $ M_{F}$ of each hyperfine level $F$ are also determined by considering the contributions of tensor polarizabilities.