机构地区: 华南师范大学
出 处: 《物理学报》 2004年第2期356-361,共6页
摘 要: 利用含适量子系统传播子的ABCD形式的理论 ,将品质因子守恒系统中的ABCD定律 ,推广到有效品质因子守恒的系统———原子激光的传输中 ,通过引入有效品质因子和有效参数qeff,利用Heisenberg图像得到传播子的有效ABCD形式 .由于原子激光内部原子间相互作用的存在 ,原有的品质因子不再守恒 。 Within the frame of the ABCD formulation for the propagators in a time_dependent quantum system, the ABCD law has been extended to the so-called effective ABCD system in which the effective beam quality factor is conservative. We discussed the system as the propagation of the atom laser beam. The effective beam quality factor and the effective parameter are introduced to obtain the effective ABCD formulation of the propagators by means of Heisenberg picture. The atom_atom interactions in the atom laser beam make the beam quality factor nonconservative, and thus the effective beam quality factor can describe the combined effect of the beam quality factor and the atom_atom interaction.