Quasi-ergodic problem

Other difficulties in molecular simulations arise from the so-called quasi-ergodic problem, i.e., the possibility that the system becomes trapped in a small region of the phase space. To avoid it, whatever the initial conditions, the system should be allowed to equilibrate before starting the simulation, and during the calculation, the bulk properties should be carefully monitored to detect any long-time drift. 

Tackling the Problem of Quasi-ergodicity J-walking and Multicanonical Monte Carlo... 

To illustrate the kinds of problems to which we refer, we make use of a classical double-well potential that has proved to be usefuF for the study of quasi-ergodicity ... 

---