arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.3986nucl-th
收藏

用连续能级密度求配对哈密顿量的精确本征值

Exact Eigenvalues of the Pairing Hamiltonian Using Continuum Level Density

R. Id Betan

摘要:

配对哈密顿量是多体系统中的一个重要近似,它是精确可解的,是量子可积的.另一方面,连续谱单粒子能级密度(CSPLD)包含了连续谱能谱的信息。对于连续统中的关联,是否可以使用具有恒定配对强度的哈密顿量的问题仍然没有答案。本文推广了连续介质中包含关联的配对哈密顿量的Richardson精确解。共振和非共振连续体通过CSPLD被包括。利用柯西定理,明确了共振关联。计算了偶碳同位素的优先级为零和优先级为二的低激发态。我们的结论是,能级确实可以计算与常数配对的连续使用CSPLD。发现核$^{24}$ C未结合。开发的连续体的真实和复杂的能量表示和它们的差异。图中给出了原子核$^{28}$ C的连续谱中电子对能量的轨迹。

英文摘要:

The pairing Hamiltonian constitutes an important approximation in many- body systems, it is exactly soluble and quantum integrable. On the other hand, the continuum single particle level density (CSPLD) contains information about the continuum energy spectrum. The question whether one can use the Hamiltonian with constant pairing strength for correlations in the continuum is still unanswered. In this paper we generalize the Richardson exact solution for the pairing Hamiltonian including correlations in the continuum. The resonant and non-resonant continuum are included through the CSPLD. The resonant correlations are made explicit by using the Cauchy theorem. Low lying states with seniority zero and two are calculated for the even Carbon isotopes. We conclude that energy levels can indeed be calculated with constant pairing in the continuum using the CSPLD. It is found that the nucleus $^{24}$C is unbound. The real and complex energy representation of the continuum is developed and their differences are shown. The trajectory of the pair energies in the continuum for the nucleus $^{28}$C is shown.

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。

↑