297 citations · 306 across the 3 of their papers we have counts for
9 papers
Robustness versus sensitivity in non-Hermitian topological lattices probed by pseudospectra
I. Komis, D. Kaltsas, S. Xia +3
Non-Hermitian topological systems simultaneously posses two antagonistic features: ultra sensitivity due to exceptional points and robustness of topological zero energy modes, and…
Nonlinear control of PT-symmetry and non-Hermitian topological states
Shiqi Xia, Dimitrios Kaltsas, Daohong Song +6
Advances in topological photonics and non-Hermitian optics have drastically changed our perception on how interdisciplinary concepts may empower unprecedented applications. Bridgin…
A tokamak pertinent analytic equilibrium with plasma flow of arbitrary direction
D. A. Kaltsas, A. Kuiroukidis, G. N. Throumoulopoulos
An analytic solution to a generalized Grad-Shafranov equation with flow of arbitrary direction is obtained upon adopting the generic linearizing ansatz for the free functions relat…
A discrete Nambu bracket for 2D extended Magnetohydrodynamics
D. A. Kaltsas, M. Kraus, G. N. Throumoulopoulos
In this note we propose a trilinear bracket formulation for the Hamiltonian extended Magnetohydrodynamics (XMHD) model with homogeneous mass density. The corresponding two-dimensio…
Energy-Casimir, dynamically accessible, and Lagrangian stability of extended magnetohydrodynamic equilibria
D. A. Kaltsas, G. N. Throumoulopoulos, P. J. Morrison
The formal stability analysis of Eulerian extended magnetohydrodynamics (XMHD) equilibria is considered within the noncanonical Hamiltonian framework by means of the energy-Casimir…
2D magnetofluid models constructed by a priori imposition of conservation laws
D. A. Kaltsas, G. N. Throumoulopoulos
Motivated by a geometric method employed for the derivation of the Nambu bracket for ideal two-dimensional incompressible hydrodynamics, we reconstruct the reduced magnetohydrodyna…