Diffusion Monte Carlo methods for spin-orbit-coupled ultracold Bose gases
PublisherAmerican Physical Society (APS)
Rights accessOpen Access
We present two diffusion Monte Carlo (DMC) algorithms for systems of ultracold quantum gases featuring synthetic spin-orbit interactions. The first one is a spin-integrated DMC method which provides fixed-phase energy estimates. The second one is a discrete spin generalisation of the T-moves spin-orbit DMC [Melton et al., J. Chem. Phys. 144, 244113 (2016)], which provides an upper bound to the fixed-phase energy. The former is a more accurate method but it is restricted to spin-independent two-body interactions. We report a comparison between both algorithms for different systems. As a check of the efficiency of both methods, we compare the DMC energies with results obtained with other numerical methods, finding agreement between both estimations.
CitationSánchez, J., Boronat, J., Mazzanti, F. Diffusion Monte Carlo methods for spin-orbit-coupled ultracold Bose gases. "Physical review A", 27 Novembre 2018, vol. 98, núm. 5, p. 053632-1-053632-16.