16 citations · 75 across the 30 of their papers we have counts for
8 papers · 1 filter
Superradiance-induced multistability in driven Rydberg lattice gases
Yunhui He, Zhengyang Bai, Yuechun Jiao +2
We study steady state phases of a one-dimensional array of Rydberg atoms coupled by a microwave (MW) field where the higher energy Rydberg state decays to the lower energy one via…
Block Preconditioners for the Marker-and-Cell Discretization of the Stokes-Darcy Equations
Chen Greif, Yunhui He
We consider the problem of iteratively solving large and sparse double saddle-point systems arising from the stationary Stokes-Darcy equations in two dimensions, discretized by the…
Optimized sparse approximate inverse smoothers for solving Laplacian linear systems
Yunhui He, Jun Liu, Xiang-Sheng Wang
In this paper we propose and analyze new efficient sparse approximate inverse (SPAI) smoothers for solving the two-dimensional (2D) and three-dimensional (3D) Laplacian linear syst…
Parameter-robust Braess-Sarazin-type smoothers for linear elasticity problems
Yunhui He, Yu Li
In this work, we propose three Braess-Sarazin-type multigrid relaxation schemes for solving linear elasticity problems, where the marker and cell scheme, a finite difference method…
A Vanka-based parameter-robust multigrid relaxation for the Stokes-Darcy Brinkman problems
Yunhui He
We propose a block-structured multigrid relaxation scheme for solving the Stokes-Darcy Brinkman equations discretized by the marker and cell scheme. An element-based additive Vanka…
Smoothing analysis of two robust multigrid methods for elliptic optimal control problems
Yunhui He, Jun Liu
In this paper we study and compare two multigrid relaxation schemes with coarsening by two, three, and four for solving elliptic sparse optimal control problems with control constr…
A Vanka-type multigrid solver for complex-shifted Laplacian systems from diagonalization-based parallel-in-time algorithms
Yunhui He, Jun Liu
We propose and analyze a Vanka-type multigrid solver for solving a sequence of complex-shifted Laplacian systems arising in diagonalization-based parallel-in-time algorithms for ev…
Optimal smoothing factor with coarsening by three for the MAC scheme for the Stokes equations
Yunhui He
In this work, we propose a local Fourier analysis for multigrid methods with coarsening by a factor of three for the staggered finite-difference method applied to the Stokes equati…