Spectrum of elementary excitations of the Bose system with allowance for pair correlations

2018 ◽  
Vol 44 (10) ◽  
pp. 1040-1048 ◽  
Author(s):  
Yu. M. Poluektov
Keyword(s):  
Bose System ◽  
Elementary Excitations ◽  
Pair Correlations

scholarly journals np-Pair Correlations in the Isovector Pairing Model

Symmetry ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1405
Author(s):  
Feng Pan ◽  
Yingwen He ◽  
Lianrong Dai ◽  
Chong Qi ◽  
Jerry P. Draayer
Keyword(s):  
Binding Energy ◽  
Occupation Number ◽  
Mean Field ◽  
Energy Difference ◽  
Binding Energies ◽  
Pair Correlations ◽  
Isospin Symmetry Breaking ◽  
Pairing Model ◽  
Proton Pairing ◽  
Spin Basis

A diagonalization scheme for the shell model mean-field plus isovector pairing Hamiltonian in the O(5) tensor product basis of the quasi-spin SUΛ(2) ⊗ SUI(2) chain is proposed. The advantage of the diagonalization scheme lies in the fact that not only can the isospin-conserved, charge-independent isovector pairing interaction be analyzed, but also the isospin symmetry breaking cases. More importantly, the number operator of the np-pairs can be realized in this neutron and proton quasi-spin basis, with which the np-pair occupation number and its fluctuation at the J = 0+ ground state of the model can be evaluated. As examples of the application, binding energies and low-lying J = 0+ excited states of the even–even and odd–odd N∼Z ds-shell nuclei are fit in the model with the charge-independent approximation, from which the neutron–proton pairing contribution to the binding energy in the ds-shell nuclei is estimated. It is observed that the decrease in the double binding-energy difference for the odd–odd nuclei is mainly due to the symmetry energy and Wigner energy contribution to the binding energy that alter the pairing staggering patten. The np-pair amplitudes in the np-pair stripping or picking-up process of these N = Z nuclei are also calculated.

scholarly journals Matrix product wave function of the ground state and elementary excitations in the spin- 12 chain

2021 ◽  
Vol 103 (12) ◽  
Author(s):  
Jintae Kim ◽  
Minsoo Kim ◽  
Pramod Padmanabhan ◽  
Jung Hoon Han ◽  
Hyun-Yong Lee
Keyword(s):  
Wave Function ◽  
Ground State ◽  
Matrix Product ◽  
Elementary Excitations

scholarly journals Elementary Excitations of Nanowire Magnets

2005 ◽  
Vol 159 ◽  
pp. 308-313 ◽  
Author(s):  
Tôru Sakai ◽  
Munehisa Matsumoto ◽  
Kaname Asakura ◽  
Masahiro Sato
Keyword(s):  
Elementary Excitations

Pair correlations and interaction energies in FePd single crystal

2004 ◽  
Vol 41 (2) ◽  
pp. 207-212 ◽  
Author(s):  
T. Mehaddene ◽  
J. M. Sanchez ◽  
R. Caudron ◽  
M. Zemirli ◽  
V. Pierron-Bohnes
Keyword(s):  
Single Crystal ◽  
Interaction Energies ◽  
Pair Correlations
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