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arXiv physics/0511205physics.atom-ph
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允许和宇称非守恒电偶极跃迁振幅的随机相位近似及其与多体微扰理论和耦合集团理论的联系

Random Phase Approximation For allowed and Parity Non-conserving Electric Dipole Transition Amplitudes and its connection with Many-Body Perturbation Theory and Coupled Cluster Theory

Geetha Gopakumar, Chiranjib Sur, Bhanu Pratap Das, Rajat K. Chaudhuri, D. Mukherjee, Kimihiko Hirao

摘要:

探讨了无规相近似(RPA)与多体微扰理论(MBPT)及其全阶推广的耦合团簇理论(CCT)之间的联系。导出了宇称非守恒中性弱相互作用引起的允许跃迁和禁戒跃迁的电偶极振幅的显式表达式。与RPA项在这两种情况下的戈德斯通图中示出出现在MBPT和CCT和允许的电偶极跃迁的这种关系的数值验证。

英文摘要:

The connections between the Random Phase Approximation (RPA) and Many-Body Perturbation Theory (MBPT) and its all order generalisation, the Coupled- Cluster Theory (CCT) have been explored. Explicit expressions have been derived for the electric dipole amplitudes for allowed and forbidden transitions induced by the parity non-conserving neutral weak interaction. The Goldstone diagrams associated with the RPA terms in both cases are shown to arise in MBPT and CCT and the numerical verification of this relationship is made for the allowed electric dipole transitions.

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