A uniformly accurate multiscale time integrator pseudospectral method for the Klein--Gordon equation in the nonrelativistic limit regime

W Bao, Y Cai, X Zhao - SIAM Journal on Numerical Analysis, 2014 - SIAM
We propose and analyze a multiscale time integrator Fourier pseudospectral (MTI-FP)
method for solving the Klein--Gordon (KG) equation with a dimensionless parameter …

Uniformly accurate exponential-type integrators for Klein-Gordon equations with asymptotic convergence to the classical NLS splitting

S Baumstark, E Faou, K Schratz - Mathematics of Computation, 2018 - ams.org
We introduce efficient and robust exponential-type integrators for Klein-Gordon equations
which resolve the solution in the relativistic regime as well as in the highly-oscillatory …

Comparison of numerical methods for the nonlinear Klein-Gordon equation in the nonrelativistic limit regime

W Bao, X Zhao - Journal of Computational Physics, 2019 - Elsevier
Different efficient and accurate numerical methods have recently been proposed and
analyzed for the nonlinear Klein-Gordon equation (NKGE) with a dimensionless parameter …

Numerical methods and comparison for the Dirac equation in the nonrelativistic limit regime

W Bao, Y Cai, X Jia, Q Tang - Journal of Scientific Computing, 2017 - Springer
We analyze rigorously error estimates and compare numerically spatial/temporal resolution
of various numerical methods for the discretization of the Dirac equation in the nonrelativistic …

A uniformly accurate (UA) multiscale time integrator Fourier pseudospectral method for the Klein–Gordon–Schrödinger equations in the nonrelativistic limit regime: A …

W Bao, X Zhao - Numerische Mathematik, 2017 - Springer
A multiscale time integrator Fourier pseudospectral (MTI-FP) method is proposed and
analyzed for solving the Klein–Gordon–Schrödinger (KGS) equations in the nonrelativistic …

Long time error analysis of the fourth‐order compact finite difference methods for the nonlinear Klein–Gordon equation with weak nonlinearity

Y Feng - Numerical Methods for Partial Differential Equations, 2021 - Wiley Online Library
We present the fourth‐order compact finite difference (4cFD) discretizations for the long time
dynamics of the nonlinear Klein–Gordon equation (NKGE), while the nonlinearity strength is …

Hamiltonian Particle-in-Cell methods for Vlasov–Poisson equations

A Gu, Y He, Y Sun - Journal of Computational Physics, 2022 - Elsevier
In this paper, Particle-in-Cell algorithms for the Vlasov–Poisson system are presented based
on its Poisson bracket structure. The Poisson equation is solved by finite element methods …

Long time error analysis of finite difference time domain methods for the nonlinear Klein-Gordon equation with weak nonlinearity

W Bao, Y Feng, W Yi - arXiv preprint arXiv:1903.01133, 2019 - arxiv.org
We establish error bounds of the finite difference time domain (FDTD) methods for the long
time dynamics of the nonlinear Klein-Gordon equation (NKGE) with a cubic nonlinearity …

Uniformly accurate nested Picard iterative integrators for the Dirac equation in the nonrelativistic limit regime

Y Cai, Y Wang - SIAM Journal on Numerical Analysis, 2019 - SIAM
This paper is devoted to the construction and analysis of uniformly accurate nested Picard
iterative integrators (NPI) for the Dirac equation in the nonrelativistic limit regime. In this …

A uniformly accurate multiscale time integrator spectral method for the Klein–Gordon–Zakharov system in the high-plasma-frequency limit regime

W Bao, X Zhao - Journal of Computational Physics, 2016 - Elsevier
A multiscale time integrator sine pseudospectral (MTI-SP) method is presented for
discretizing the Klein–Gordon–Zakharov (KGZ) system with a dimensionless parameter 0< …