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arXiv · 2004.14268

Thouless-Valatin moment of inertia and removal of the spurious mode in the linear response theory

Markus Kortelainen
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Abstract

Symmetry breaking at the mean-field level leads to an appearance of a symmetry restoring Nambu-Goldstone (NG) mode in the linear response theory. These modes represent a special kind of collective motion of the system. However, they can interfere with the calculated intrinsic physical excitations and, hence, they are often called as spurious modes. I discuss translational and rotational NG mode and the inertia parameter associated with these modes, by using the finite amplitude method formalism. I will also discuss how to remove spurious mode from the calculated transition strength function.

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Markus Kortelainen. 2020-04-29. Thouless-Valatin moment of inertia and removal of the spurious mode in the linear response theory. https://doi.org/10.1088/1742-6596/1643/1/012142

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