104 citations · 1.6k across the 103 of their papers we have counts for
9 papers · 2 filters
Plasma physics in strong-field regimes: theories and simulations
Yuan Shi, Hong Qin, Nathaniel J. Fisch
In strong electromagnetic fields, unique plasma phenomena and applications emerge, whose description requires recently developed theories and simulations [Y. Shi, Ph.D. thesis, Pri…
Geometric Electrostatic Particle-In-Cell Algorithm on Unstructured Meshes
Zhenyu Wang, Hong Qin, Benjamin Sturdevant +1
We present a geometric Particle-in-Cell (PIC) algorithm on two-dimensional (2D) unstructured meshes for studying electrostatic perturbations in magnetized plasmas. In this method,…
Topological phases and bulk-edge correspondence of magnetized cold plasmas
Yichen Fu, Hong Qin
Plasmas have been recently studied as topological materials. However, a comprehensive picture of topological phases and topological phase transitions in cold magnetized plasmas is…
Spontaneous and explicit parity-time-symmetry breaking in drift wave instabilities
Hong Qin, Yichen Fu, Alexander S. Glasser +1
A method of Parity-Time (PT)-symmetry analysis is introduced to study the high dimensional, complicated parameter space of drift wave instabilities. We show that spontaneous PT-sym…
An Explicitly Solvable Energy-Conserving Algorithm for Pitch-Angle Scattering in Magnetized Plasmas
Yichen Fu, Xin Zhang, Hong Qin
We develop an Explicitly Solvable Energy-Conserving (ESEC) algorithm for the Stochastic Differential Equation (SDE) describing the pitch-angle scattering process in magnetized plas…
Slow manifolds of classical Pauli particle enable structure-preserving geometric algorithms for guiding center dynamics
Jianyuan Xiao, Hong Qin
Since variational symplectic integrators for the guiding center was proposed [1,2], structure-preserving geometric algorithms have become an active research field in plasma physics…
Discovering exact, gauge-invariant, local energy-momentum conservation laws for the electromagnetic gyrokinetic system by high-order field theory on heterogeneous manifolds
Peifeng Fan, Hong Qin, Jianyuan Xiao
Gyrokinetic theory is arguably the most important tool for numerical studies of transport physics in magnetized plasmas. However, exact local energy-momentum conservation law for t…
Explicit Structure-Preserving Geometric Particle-in-Cell Algorithm in Curvilinear Orthogonal Coordinate Systems and Its Applications to Whole-Device 6D Kinetic Simulations of Tokamak Physics
Jianyuan Xiao, Hong Qin
Explicit structure-preserving geometric Particle-in-Cell (PIC) algorithm in curvilinear orthogonal coordinate systems is developed. The work reported represents a further developme…
The Physics of Spontaneous Parity-Time Symmetry Breaking in the Kelvin-Helmholtz Instability
Yichen Fu, Hong Qin
We show that the dynamics, in particular the Kelvin-Helmholtz (KH) instability, of an inviscid fluid with velocity shear admits Parity-Time (PT) symmetry, which provides a physical…