Microscopic response theory for strongly coupled superfluid fermionic systems
Microscopic response theory for strongly coupled superfluid fermionic systems
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强耦合超流费米子系统的微观响应理论
DOI:
10.1103/physrevc.106.064316
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发表时间:
2022
影响因子:
3.1
通讯作者:
Zhang, Yinu
中科院分区:
文献类型:
--
作者:
Litvinova, Elena;Zhang, Yinu
A consistent microscopic theory for the response of strongly coupled superfluid fermionic systems is formulated. After defining the response as a two-point two-fermion correlation function in the basis of the Bogolyubov quasiparticles, the equation of motion (EOM) method is applied using the most general fermionic Hamiltonian with a bare two-body interaction, also transformed to the quasiparticle space. As a superfluid extension of the case of the normal phase, the resulting EOM is of the Bethe-Salpeter-Dyson form with the static and dynamical interaction kernels, where the former determines the short-range correlations and the latter is responsible for the long-range ones. Both kernels as well as the entire EOM have the double dimension as compared to that of the normal phase. Nonperturbative approximations via the cluster decomposition of the dynamical kernel are discussed, with the major focus on a continuous derivation of the quasiparticle-phonon coupling variant of the latter kernel, where the phonons (vibrations) are composite correlated two-quasiparticle states unifying both the normal and pairing modes. The developed theory is adopted for nuclear structure applications, such as the nuclear response in various channels. In particular, the finite-amplitude method generalized beyond the quasiparticle random phase approximation, taking into account the quasiparticle-vibration coupling, is formulated for prospective calculations in nonspherical nuclei.
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影响因子:
0.4
作者:
S. Kamerdzhiev;G. Tertychnyi;V. Tselyaev
通讯作者:
V. Tselyaev
DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
C. Yannouleas;S. Jang;P. Chomaz
通讯作者:
P. Chomaz
DOI:
--
发表时间:
1989
期刊:
影响因子:
--
作者:
S. Adachi;P. Schuck
通讯作者:
P. Schuck
影响因子:
4.4
作者:
P. Bortignon;R. Broglia;D. Bès
通讯作者:
D. Bès
影响因子:
2.7
作者:
P. Schuck;M. Tohyama
通讯作者:
M. Tohyama