Arxiv Selection Dec 2020

Dec 1- Dec 7 Bhaskar Mukherjee, Dec 8- Dec 12 Zehan Li

Dec 11

arXiv:2012.07611 [pdf, ps, other] cond-mat.quant-gas quant-ph

Fast-forward scaling of atom-molecule conversion in Bose-Einstein condensates

Authors: JingJun Zhu, Xi Chen

Robust stimulated Raman exact passages are requisite for controlling nonlinear quantum systems, with the wide applications ranging from ultracold molecules, non-linear optics to superchemistry. Inspired by shortcuts to adiabaticity, we propose the fast-forward scaling of stimulated Raman adiabatic processes with the nonlinearity involved, describing the transfer from an atomic Bose-Einstein condensate to a molecular one by controllable external fields. The fidelity and robustness of atom-molecule conversion are shown to surpass those of conventional adiabatic passages, assisted by fast-forward driving field. Finally, our results are extended to the fractional stimulated Raman adiabatic processes for the coherent superposition of atomic and molecular states.