2018/07/12 by Xingran Xu, Lei Chen, Zhidong Zhang +1 · 1 citation
Physics and Astronomy · #cond-mat.quant-gas #cond-mat.other #nlin.PS
paper · pdf · doi:10.1088/1361-6455/aaf4dd
9 pages, 2 figures
arxiv created 2018/07/12 · arxiv updated 2019/05/22
Adopting a mean-field Gross-Pitaevskii description for a spinor polariton Bose-Einstein condensates under non-resonant pumping, we investigate the static and dynamical properties of dark-bright solitons. We derive analytically the equation of motion for the center of mass of the dark-bright soliton center, using the Hamiltonian approach. The resulting equation captures how the combination of the open-dissipative character and the spin degrees of freedom of a polariton Bose-Einstein condensate affects the properties of a dark-bright soliton, i.e. the dark-bright soliton relaxes by blending with the background at a finite time. In this case, we also determine the life time of the DB soliton. Further numerical solutions of the modified dissipative two-component Gross-Pitaevskii equations are in excellent agreement with the analytical results. In presence of the Langevin noise, we demonstrate that the DB solitons can still propagate for a long time, which is sufficient for their experimental observations within current facilities.