【摘要】 通过实际事例研究了可能出现光学双稳性的激光系统中的临界现象,并且用平均场理论作详细描述。这里揭示了在作为远离平衡系统的上述激光器中一种更为特殊的临界点,它意味着一级相变与二级相变之间的转变。它十分类似于Landau(1937)在他著名二级(平衡)相变理论中所预见的“第二类相变(线)的临界点”。更多还原

【Abstract】 Critical phenomena in laser system, in which optical bistability can occur, are studied with concrete examples and described by the mean field theory in detail. A more special critical point,which implies the transition between phase transition of the first order and that of the second order, is revealed in this system which is far from equilibrium. This phenomena resembles the "critical point of phase transition (line) of second kind",predicted by Landau (1937) in his well - known theory of second -order (equilibrium) phase transitions.更多还原