用Wigner分布函数研究含时Hartree-Fock方法中的平衡
Equilibration in the time-dependent Hartree-Fock approach probed with the Wigner distribution function
摘要：
通过计算反应平面上的Wigner分布函数，我们可以研究重离子碰撞中含时Hartree-Fock的相空间行为。我们比较了Wigner分布函数和平滑的Husimi分布函数。观测量的定义是为了给局部和全局平衡的定量测量。我们提出了不同的反应方案，通过分析中心和非中心$^{16}O+$ $^{16}O$和$^{96}Zr+$ $^{132}Zn$冲突。它示出的初始相空间体积的碎片几乎没有合并。观测值的平均值在聚变反应中是守恒的，并表明在含时Hartree-Fock中存在“记忆效应”。我们观察到强耗散，但没有证据表明完全平衡。
英文摘要：
Calculating the Wigner distribution function in the reaction plane, we are able to probe the phase-space behavior in time-dependent Hartree-Fock during a heavy-ion collision. We compare the Wigner distribution function with the smoothed Husimi distribution function. Observables are defined to give a quantitative measure for local and global equilibration. We present different reaction scenarios by analyzing central and non-central $^{16}O+$$^{16}O$ and $^{96}Zr+$$^{132}Zn$ collisions. It is shown that the initial phase-space volumes of the fragments barely merge. The mean values of the observables are conserved in fusion reactions and indicate a "memory effect" in time-dependent Hartree-Fock. We observe strong dissipation but no evidence for complete equilibration.
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