Feasibility of the finite-amplitude method in covariant density functional theory

Haozhao Liang (梁豪兆), Takashi Nakatsukasa (中務孝), Zhongming Niu (牛中明), and Jie Meng (孟杰)

Phys. Rev. C 87, 054310 – Published 13 May 2013

Abstract

The self-consistent relativistic random-phase approximation (RPA) in the radial coordinate representation is established by using the finite-amplitude method (FAM). Taking the isoscalar giant monopole resonance in spherical nuclei as example, the feasibility of the FAM for the covariant density functionals is demonstrated, and the newly developed methods are verified by the conventional RPA calculations. In the present relativistic RPA calculations, the effects of the Dirac sea can be automatically taken into account in the coordinate-space representation. The rearrangement terms due to the density-dependent couplings can be implicitly calculated without extra computational costs in both iterative and matrix FAM schemes.

Received 8 April 2013

DOI:https://doi.org/10.1103/PhysRevC.87.054310

Authors & Affiliations

Haozhao Liang (梁豪兆)^1,2, Takashi Nakatsukasa (中務孝)^1,3, Zhongming Niu (牛中明)⁴, and Jie Meng (孟杰)^2,5,6

¹RIKEN Nishina Center, Wako 351-0198, Japan
²State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
³Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8571, Japan
⁴School of Physics and Material Science, Anhui University, Hefei 230039, China
⁵School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
⁶Department of Physics, University of Stellenbosch, Stellenbosch, South Africa

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Issue

Vol. 87, Iss. 5 — May 2013

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Physical Review C

covering nuclear physics