Amplification of Quantum Meson Modes in the Late Time of Chiral Phase Transition
Amplification of Quantum Meson Modes in the Late Time of Chiral Phase Transition
复制标题
手性相变后期量子介子模式的放大
DOI：
10.1143/ptp.113.369
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
S.Nishiyama
中科院分区：
文献类型：
--
作者：
K.Watanabe;Y.Tsue;S.Nishiyama
在O（4）线性sigma模型下，利用高斯波泛函近似，证明了在手征相变后期，低动量量子π介子模的振幅存在放大的可能性.结果还表明，放大发生在共振机制中的强制振荡，以及参数共振诱导的手征凝聚体的小振荡。这些机制的情况下，空间均匀的系统和空间扩展系统描述的Bjorken坐标进行了研究。
It is shown that there exists a possibility of amplification of amplitudes of quantum pion modes with low momenta in the late time of chiral phase transition by using the Gaussian wave functional approximation in the O(4) linear sigma model. It is also shown that the amplification occurs in the mechanism of the resonance by forced oscillation as well as the parametric resonance induced by the small oscillation of the chiral condensate. These mechanisms are investigated in both the case of spatially homogeneous system and the spatially expanded system described by the Bjorken coordinate.