The microcanonical dynamics of an ensemble of random magnetic dipoles in a needle has been investigated. Due to the presence of a constant of motion in the 1D case, a ‘dimensional’ phase transition in the quasi one-dimensional case has been found separating a paramagnetic chaotic phase from a ferromagnetic regular one. In particular, a simple criterion for the transition has been formulated and an intensive critical parameter found. Numerical simulations support our understanding of this complex phenomenon.
|Numero di pagine||15|
|Rivista||Journal of Statistical Mechanics: Theory and Experiment|
|Stato di pubblicazione||Pubblicato - 2010|
- dipolar interaction
- dynamical phase transitions
- long range interacting systems