Open AccessTWO EXAMPLES OF NON-EQUILIBRIUM PHASE TRANSITION -OPTICAL PARAMETRIC OSCILLATION AND LASER
Author(s) -
Feng Ke-An
Publication year - 1978
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.27.322
Subject(s) - saddle point , phase transition , critical point (mathematics) , physics , transition point , oscillation (cell signaling) , statistical physics , laser , equilibrium point , phase (matter) , quantum critical point , saddle , critical exponent , parametric statistics , quantum phase transition , condensed matter physics , quantum mechanics , nonlinear system , thermodynamics , mathematical analysis , mathematics , mathematical optimization , statistics , geometry , genetics , biology
In this article, dynamical features of non - equilibrium phase transitions are dis-cussed, taking the physical problems of OPO and laser processes as two examples. The phase transition point is found to be the point of sudden change from a stable nodal point to a saddle point. The role of fluctuations and dissipations in such phase transi-tions is elucidated, and critical exponents analogous to those in the second order phase transition are found (β = 1/2, γ = 1).