This updated revision gives a complete and topical overview on Nonconservative Stability
which is essential for many areas of science and technology ranging from particles trapping …

We report the first experimental observation of reversals of a dynamo field generated in a
laboratory experiment based on a turbulent flow of liquid sodium. The magnetic field …

It is widely known that cosmic magnetic fields, ie the fields of planets, stars, and galaxies, are
produced by the hydromagnetic dynamo effect in moving electrically conducting fluids. It is …

We show that a model, recently used to describe all the dynamical regimes of the magnetic
field generated by the dynamo effect in the von Kármán sodium experiment, also provides a …

The von Kármán Sodium (VKS) experiment studies dynamo action in the flow generated
inside a cylinder filled with liquid sodium by the rotation of coaxial impellers (the von Kármán …

A non-Hermitian complex symmetric 2× 2-matrix toy model is used to study projective Hilbert
space structures in the vicinity of exceptional points (EPs). The bi-orthogonal eigenvectors of …

We experimentally investigated the decay behavior with time t of resonances near and at
exceptional points, where two complex eigenvalues and also the associated eigenfunctions …

We report the observation of several dynamical regimes of the magnetic field generated by a
turbulent flow of liquid sodium (VKS experiment). Stationary dynamos, transitions to …

We present a study of several systems in which a large-scale field is generated over a
turbulent background. These large-scale fields break a symmetry of the forcing by selecting …

Consider the set of monic fourth-order real polynomials transformed so that the constant
term is one. In the three-dimensional space of the coefficients describing this set, the domain …