48 citations · 204 across the 7 of their papers we have counts for
7 papers
Origin of chaos near critical points of quantum flow
C. Efthymiopoulos, C. Kalapotharakos, G. Contopoulos
The general theory of motion in the vicinity of a moving quantum nodal point (vortex) is studied in the framework of the de Broglie - Bohm trajectory method of quantum mechanics. U…
Scaling of the diffusion coefficient on the normal form remainder in doubly resonant domains
C. Efthymiopoulos
An outline of theoretical estimates is given regarding the dependence of the value of the diffusion coefficient on the size of the remainder of the normal form in doubly or…
Invariant manifolds and the response of spiral arms in barred galaxies
P. Tsoutsis, C. Kalapotharakos, C. Efthymiopoulos +1
The unstable invariant manifolds of the short-period family of periodic orbits around the unstable Lagrangian points and of a barred galaxy define loci in the configura…
On the connection between the Nekhoroshev theorem and Arnold Diffusion
C. Efthymiopoulos
The analytical techniques of the Nekhoroshev theorem are used to provide estimates on the coefficient of Arnold diffusion along a particular resonance in the Hamiltonian model of F…
The coalescence of invariant manifolds and the spiral structure of barred galaxies
P. Tsoutsis, C. Efthymiopoulos, N. Voglis
In a previous paper (Voglis et al. 2006a, paper I) we demonstrated that, in a rotating galaxy with a strong bar, the unstable asymptotic manifolds of the short period family of uns…
Nodal points and the transition from ordered to chaotic Bohmian trajectories
Christos Efthymiopoulos, Constantinos Kalapotharakos, George Contopoulos
We explore the transition from order to chaos for the Bohmian trajectories of a simple quantum system corresponding to the superposition of three stationary states in a 2D harmonic…