Projection at Finite Temperature
Projection at Finite Temperature
复制标题
有限温度下的投影
DOI：
10.1006/aphy.1994.1101
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发表时间：
1994
影响因子：
3
通讯作者：
P. Ring
中科院分区：
文献类型：
--
作者：
R. Rossignoli;P. Ring
我们推导了一种通用投影形式，用于计算以特定量子数的固定值为特征的约束系综中的配分函数和期望值。该形式是为费米子和玻色子系统的任意独立粒子统计算子（包括对称性破缺的算子）开发的。作为应用，我们研究了有限温度下的角动量投影以及静态路径近似背景下形式主义的实现。在核 {sup 20}Ne 中进行了说明，其中获得了四极相互作用的固定角动量和粒子数的预计平均能量和能级密度，并将其与精确结果和不同的启动处理进行了比较。 36 个参考文献，3 个图。
We derive a general projection formalism for the calculation of partition functions and expectation values in constrained ensembles characterized by fixed values of particular quantum numbers. The formalism is developed for arbitrary independent particle statistical operators, including those with broken symmetries, for both fermion and boson systems. As application, we examine the angular momentum projection at finite temperature and the implementation of the formalism in the context of the static path approximation. Illustration is made in the nucleus {sup 20}Ne, where projected average energies and level densities with fixed angular momentum and particle number for a quadrupole interaction are obtained and compared with exact results and different cranking treatments. 36 refs., 3 figs.