87 citations · 621 across the 35 of their papers we have counts for
35 papers
TokaGLINT: A Scalable GPU-Tailored Implicit Solver for Full 3D Tokamak Electromagnetic Simulations
Zifan Yang, Haoyuan Zhang, Jialin Li +5
We introduce TokaGLINT, a GPU-accelerated implicit solver for electromagnetic field computations in full 3D tokamak simulations, aimed at efficient large-scale parallel GPU computi…
Verification of Electromagnetic Fully-kinetic Symplectic Particle-in-cell Method in Microinstabilities Simulation of
Jianyuan Xiao, Jian liu
We present a symplectic electromagnetic fully-kinetic particle-in-cell simulation of microinstabilities in plasma, using parameters from the Cyclone Base Case [Dimits, et al., Phys…
A conservative, implicit solver for 0D-2V multi-species nonlinear Fokker-Planck collision equations
Yanpeng Wang, Jianyuan Xiao, Yifeng Zheng +3
In this study, we present an optimal implicit algorithm specifically designed to accurately solve the multi-species nonlinear 0D-2V axisymmetric Fokker-Planck-Rosenbluth (FPR) coll…
Relaxation model for a homogeneous plasma with spherically symmetric velocity space
Yanpeng Wang, Jianyuan Xiao, Xianhao Rao +3
We derive the transport equations from the Vlasov-Fokker-Planck equation when the velocity space is spherically symmetric. The Shkarofsky's form of Fokker-Planck-Rosenbluth collisi…
Bohm-like Neoclassical Transport in Highly Collisional Toroidal Plasmas with High Density Gradients
Jianyuan Xiao, Huishan Cai, Jian Liu +2
Conventional neoclassical theory in the Pfirsch-Schlüter regime fails to accurately model collision-induced transport in toroidal plasmas with high density gradients. In this scena…
Explicit high-order symplectic integrators of coupled Schrodinger equations for pump-probe systems
Xiaobao Jia, Qing Jia, Jianyuan Xiao +1
Two-beam coupling within the field of nonlinear optics, which transfers energy from one light beam to the other under certain conditions, has received considerable attention in ine…
Hybrid simulation of energetic particles interacting with magnetohydrodynamics using a slow manifold algorithm and GPU acceleration
Chang Liu, Stephen C. Jardin, Hong Qin +3
The hybrid method combining particle-in-cell and magnetohydrodynamics can be used to study the interaction between energetic particles and global plasma modes. In this paper we int…
Unified perspective on single cyclotron electron with radiation-reaction from classical to quantum
Qiang Chen, Peifeng Fan, Jianyuan Xiao
We show a unified physical picture of single cyclotron electron with radiation-reaction, which bridges the classical electron models and quantum mechanical self-consistent field th…
High-order Field Theory and Weak Euler-Lagrange-Barut Equation for Classical Relativistic Particle-Field Systems
Peifeng Fan, Qiang Chen, Jianyuan Xiao
It is widely accepted that conservation laws, especially energy-momentum conservation, have fundamental importance for both classical and quantum systems in physics. A widely used…
A gauge-symmetrization method for energy-momentum tensors in high-order electromagnetic field theories
Peifeng Fan, Jianyuan Xiao, Hong Qin
For electromagnetic field theories, canonical energy-momentum conservation laws can be derived from the underpinning spacetime translation symmetry according to the Noether procedu…
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…
Gauge invariant canonical symplectic algorithms for real-time lattice strong-field quantum electrodynamics
Qiang Chen, Jianyuan Xiao, Peifeng Fan
A class of high-order canonical symplectic structure-preserving geometric algorithms are developed for high-quality simulations of the quantized Dirac-Maxwell theory based strong-f…
PT-symmetry entails pseudo-Hermiticity regardless of diagonalizability
Ruili Zhang, Hong Qin, Jianyuan Xiao
We prove that in finite dimensions, a Parity-Time (PT)-symmetric Hamiltonian is necessarily pseudo-Hermitian regardless of whether it is diagonalizable or not. This result is diffe…
Structure-preserving geometric particle-in-cell algorithm suppresses finite-grid instability -- Comment on "Finite grid instability and spectral fidelity of the electrostatic Particle-In-Cell algorithm'' by Huang et al
Jianyuan Xiao, Hong Qin
A recent paper by Huang et al. [Computer Physics Communications 207, 123 (2016)] thoroughly analyzed the Finite Grid Instability(FGI) and spectral fidelity of standard Particle-In-…
Field theory and structure-preserving geometric particle-in-cell algorithm for drift wave instability and turbulence
Jianyuan Xiao, Hong Qin
A field theory and the associated structure-preserving geometric Particle-In-Cell (PIC) algorithm are developed to study low frequency electrostatic perturbations with fully kineti…
General field theory and weak Euler-Lagrange equation for classical particle-field systems in plasma physics
Peifeng Fan, Hong Qin, Jianyuan Xiao +1
A general field theory for classical particle-field systems is developed. Compared with the standard classical field theory, the distinguish feature of a classical particle-field s…
Kelvin-Helmholtz instability is the result of parity-time symmetry breaking
Hong Qin, Ruili Zhang, Alexander S. Glasser +1
Parity-Time (PT)-symmetry is being actively investigated as a fundamental property of observables in quantum physics. We show that the governing equations of the classical two-flui…
Explicit High-Order Gauge-Independent Symplectic Algorithms for Relativistic Charged Particle Dynamics
Jianyuan Xiao, Hong Qin
Symplectic schemes are powerful methods for numerically integrating Hamiltonian systems, and their long-term accuracy and fidelity have been proved both theoretically and numerical…
Simulations of relativistic-quantum plasmas using real-time lattice scalar QED
Yuan Shi, Jianyuan Xiao, Hong Qin +1
Real-time lattice quantum electrodynamics (QED) provides a unique tool for simulating plasmas in the strong-field regime, where collective plasma scales are not well-separated from…
What breaks parity-time-symmetry? -- pseudo-Hermiticity and resonance between positive- and negative-action modes
Ruili Zhang, Hong Qin, Jianyuan Xiao +1
It is generally believed that Parity-Time (PT)-symmetry breaking occurs when eigenvalues or both eigenvalues and eigenvectors coincide. However, we show that this well-accepted pic…
On the physical mechanism of three-wave instabilities -- resonance between positive- and negative-action modes
Ruili Zhang, Hong Qin, Yuan Shi +2
Three-wave instability is a fundamental process that has important applications in many branches of physics. It is widely accepted that the resonant condition $ω_{z}\approxω_{x}+ω_…
A lattice Maxwell system with discrete space-time symmetry and local energy-momentum conservation
Jianyuan Xiao, Hong Qin, Yuan Shi +2
A lattice Maxwell system is developed with gauge-symmetry, symplectic structure and discrete space-time symmetry. Noether's theorem for Lie group symmetries is generalized to discr…