Chirikov and Nekhoroshev diffusion estimates: bridging the two sides of the river

PM Cincotta, C Efthymiopoulos, CM Giordano… - Physica D: Nonlinear …, 2014 - Elsevier
We present theoretical and numerical results pointing towards a strong connection between
the estimates for the diffusion rate along simple resonances in multidimensional nonlinear …

Arnold diffusion and Nekhoroshev theory

C Efthymiopoulos, RI Paez - I-CELMECH Training School. New frontiers of …, 2020 - Springer
Starting with Arnold's pioneering work, the term “Arnold diffusion” has been used to describe
the slow diffusion taking place in the space of the actions in Hamiltonian nonlinear …