@article{guo_bajdich_mitas_reynolds_2013, title={Study of dipole moments of LiSr and KRb molecules by quantum Monte Carlo methods}, volume={111}, ISSN={["1362-3028"]}, DOI={10.1080/00268976.2013.788741}, abstractNote={Heteronuclear dimers are of significant interest to experiments seeking to exploit ultracold polar molecules in a number of novel ways including precision measurement, quantum computing, and quantum simulation. We calculate highly accurate Born-Oppenheimer total energies and electric dipole moments as a function of internuclear separation for two such dimers, LiSr and KRb. We apply fully-correlated, high-accuracy quantum Monte Carlo methods for evaluating these molecular properties in a many-body framework. We use small-core effective potentials combined with multi-reference Slater-Jastrow trial wave functions to provide accurate nodes for the fixed-node diffusion Monte Carlo method. For reference and comparison, we calculate the same properties with Hartree-Fock and with restricted Configuration Interaction methods, and carefully assess the impact of the recovered many-body correlations on the calculated quantities. For LiSr we find a highly nonlinear dipole moment curve, which may make this molecule's dipole moment tunable through vibrational state control.}, number={12-13}, journal={MOLECULAR PHYSICS}, author={Guo, Shi and Bajdich, Michal and Mitas, Lubos and Reynolds, Peter J.}, year={2013}, month={Jul}, pages={1744–1752} }