Dirac方程分裂步多辛格式
The Split-Step Multisymplectic Scheme for Dirac Equation

把非线性的Dirac方程分裂成线性和非线性2个子问题,这2个子问题具有辛或者多辛结构,可以用辛格式对它们进行离散计算,得到的格式具有整体辛性.此格式较传统的多辛格式具有效率高、计算快等优点.
One splits the Dirac equation into a linear subproblem and a nonlinear subproblem.The subproblems are equipped with symplectic or multisymplectic structures.Then,they are approximated by symplectic integrators.As a whole,the scheme is symplectic.It is superior to the traditional multisymplectic integrator in efficiency and computational cost