arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2212.07673nucl-th
收藏

由能量密度泛函映射有效哈密顿量的超越平均场

Beyond-Mean-Field with an Effective Hamiltonian Mapped from an Energy Density Functional

J. Ljungberg, J. Boström, B. G. Carlsson, A. Idini, J. Rotureau

摘要:

描述了一种基于能量密度泛函的超平均场计算方法。其主要思想是映射的能量表面的核四极形变,从能量密度功能在平均场水平,到一个有效的哈密顿表示为多体运营商。这种方法的优点是避免了在超越平均场方法中可能出现的密度依赖性问题。有效的哈密顿量,然后使用在一个简单的方式在发电机坐标的方法,包括投影到良好的粒子数和角动量。最后,得到了谱和波函数。作为该方法的一个例子,计算的核$ ^{62} $锌进行三种不同的参数化的Skyrme功能。并与实验结果进行了比较。

英文摘要:

A method for beyond-mean-field calculations based on an energy density functional is described. The main idea is to map the energy surface for the nuclear quadrupole deformation, obtained from an energy density functional at the mean-field level, into an effective Hamiltonian expressed as a many-body operator. The advantage of this procedure is that one avoids the problems with density dependence which can arise in beyond-mean-field methods. The effective Hamiltonian is then used in a straightforward way in the generator-coordinate-method with the inclusion of projections onto good particle numbers and angular momentum. In the end, both spectra and wave functions are obtained. As an example of the method, calculations for the nucleus $ ^{62} $Zn is performed with three different parametrizations of the Skyrme functional. The results are compared with experiment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑