It is well-known that the charge-violating interaction is usually underestimated in nuclear many-body approaches,the so-called Nolen–Schiffer anomaly.In the framework of the Skyrme–Hartree–Fock(SHF)method,the effec...It is well-known that the charge-violating interaction is usually underestimated in nuclear many-body approaches,the so-called Nolen–Schiffer anomaly.In the framework of the Skyrme–Hartree–Fock(SHF)method,the effective two-body charge-symmetry breaking(CSB)and charge-independent breaking(CIB)interactions in nuclear medium are included.展开更多
In a two component fermion system, the mismatched Fermi surfaces prevent the formation of Cooper pairsbetween the two spices near their average Fermi surface. Our previous work[1] has shown that the angle dependenceof...In a two component fermion system, the mismatched Fermi surfaces prevent the formation of Cooper pairsbetween the two spices near their average Fermi surface. Our previous work[1] has shown that the angle dependenceof the non s-wave pairing gap can reduce the effect of the difference μ between the Fermi surfaces of two spices inasymmetric nuclear matter. On the other hand, in the heavy fermion superconductors, such as CeCoIn5 pressuredCeRhIn5 NpPd5Al2 and Tl-based cuprates, may have a couple of common features, for example, the d-wave pairingand a strong paramagnetic effect (the difference of the two Fermi surfaces μ). Therefore, the angle dependence ofthe pairing gap may have significant influence in these systems.展开更多
In-medium nucleon-nucleon(NN)cross sections at various densities and isospin asymmetries are investigated systematically in the framework of the Brueckner-Hartree-Fock approach.The calculations are based on the exact ...In-medium nucleon-nucleon(NN)cross sections at various densities and isospin asymmetries are investigated systematically in the framework of the Brueckner-Hartree-Fock approach.The calculations are based on the exact treatment of the center-of-mass momentum instead of the total momentum approximation employed in previous works^([1]).展开更多
A systematical investigation of nucleon momentum distributions at various densities and isospin asymmetries for nuclear matter are performed within the extended Brueckner-Hartree-Fock(EBHF)approach.The shapes of the n...A systematical investigation of nucleon momentum distributions at various densities and isospin asymmetries for nuclear matter are performed within the extended Brueckner-Hartree-Fock(EBHF)approach.The shapes of the normalized momentum distributions varying with k/kF are shown to be practically identical。展开更多
We have calculated the proton spectral functions for finite nuclei by the local density approximation where the nuclear structure is calculated from the Skyrme-Hartree-Fock method and the nuclear matter calculation is...We have calculated the proton spectral functions for finite nuclei by the local density approximation where the nuclear structure is calculated from the Skyrme-Hartree-Fock method and the nuclear matter calculation is performed within the framework of the extended Brueckner-Hartree-Fock approach by adopting the AV18 two-body interaction supplemented with a microscopic three-body force[1].展开更多
We calculate the neutron-proton(np)pairing gap in the framework of the extend Bruecker-Hartree-Fock(BHF)approach in combination with the BCS theory by considering the self-energy effect,which is calculated up to the t...We calculate the neutron-proton(np)pairing gap in the framework of the extend Bruecker-Hartree-Fock(BHF)approach in combination with the BCS theory by considering the self-energy effect,which is calculated up to the third order.The result shows that the self-energy up to the second order reduces the effective energy gap strongly while the renormalization term enhances it significantly.In addition,the effect of the three-body force(3BF)on the np pairing gap is shown to be negligible.To connect with the np pairing in finite nuclei we propose an effective density-dependent zero-range pairing force with the parameters fitting to the calculated energy gap.展开更多
Due to the anisotropic pairing interaction in asymmetric two component D-wave pairing systems,the pairing gap and quasiparticle spectrum are also anisotropic.When Cooper pair momentum are considered,the FFLO state is ...Due to the anisotropic pairing interaction in asymmetric two component D-wave pairing systems,the pairing gap and quasiparticle spectrum are also anisotropic.When Cooper pair momentum are considered,the FFLO state is nondegenerate for the orientation of the Cooper pair momentum 2q and some special directions of 2q are local stable.Reference[1]points out only two special orientations[orthogonal and parallel orientations respect with the symmetry axis of angle-depend gap(ADG)[2]]of 2q are found.However,different from the result in Ref.[1],for moderate asymmetry the favored direction of 2q is between the orthogonal and parallel orientations.展开更多
文摘It is well-known that the charge-violating interaction is usually underestimated in nuclear many-body approaches,the so-called Nolen–Schiffer anomaly.In the framework of the Skyrme–Hartree–Fock(SHF)method,the effective two-body charge-symmetry breaking(CSB)and charge-independent breaking(CIB)interactions in nuclear medium are included.
文摘In a two component fermion system, the mismatched Fermi surfaces prevent the formation of Cooper pairsbetween the two spices near their average Fermi surface. Our previous work[1] has shown that the angle dependenceof the non s-wave pairing gap can reduce the effect of the difference μ between the Fermi surfaces of two spices inasymmetric nuclear matter. On the other hand, in the heavy fermion superconductors, such as CeCoIn5 pressuredCeRhIn5 NpPd5Al2 and Tl-based cuprates, may have a couple of common features, for example, the d-wave pairingand a strong paramagnetic effect (the difference of the two Fermi surfaces μ). Therefore, the angle dependence ofthe pairing gap may have significant influence in these systems.
基金National Natural Science Foundation of China(11975282,11435014,11505241)Strategic Priority Research Program of Chinese Academy of Sciences(XDB34000000)Youth Innovation Promotion Association of Chinese Academy of Sciences(Y2021414)。
文摘In-medium nucleon-nucleon(NN)cross sections at various densities and isospin asymmetries are investigated systematically in the framework of the Brueckner-Hartree-Fock approach.The calculations are based on the exact treatment of the center-of-mass momentum instead of the total momentum approximation employed in previous works^([1]).
基金Natural Science Foundation of China(11505241,11175219,11705240)973 Program of China(2013CB834405)。
文摘A systematical investigation of nucleon momentum distributions at various densities and isospin asymmetries for nuclear matter are performed within the extended Brueckner-Hartree-Fock(EBHF)approach.The shapes of the normalized momentum distributions varying with k/kF are shown to be practically identical。
基金National Natural Science Foundation of China(11435014,11175219,11373038,11603046,11705240,11505241)973 Program of China(2013CB834405)。
文摘We have calculated the proton spectral functions for finite nuclei by the local density approximation where the nuclear structure is calculated from the Skyrme-Hartree-Fock method and the nuclear matter calculation is performed within the framework of the extended Brueckner-Hartree-Fock approach by adopting the AV18 two-body interaction supplemented with a microscopic three-body force[1].
基金National Natural Science Foundation of China(11505241,11175219,11705240)973 Program of China(2013CB834405)。
文摘We calculate the neutron-proton(np)pairing gap in the framework of the extend Bruecker-Hartree-Fock(BHF)approach in combination with the BCS theory by considering the self-energy effect,which is calculated up to the third order.The result shows that the self-energy up to the second order reduces the effective energy gap strongly while the renormalization term enhances it significantly.In addition,the effect of the three-body force(3BF)on the np pairing gap is shown to be negligible.To connect with the np pairing in finite nuclei we propose an effective density-dependent zero-range pairing force with the parameters fitting to the calculated energy gap.
文摘Due to the anisotropic pairing interaction in asymmetric two component D-wave pairing systems,the pairing gap and quasiparticle spectrum are also anisotropic.When Cooper pair momentum are considered,the FFLO state is nondegenerate for the orientation of the Cooper pair momentum 2q and some special directions of 2q are local stable.Reference[1]points out only two special orientations[orthogonal and parallel orientations respect with the symmetry axis of angle-depend gap(ADG)[2]]of 2q are found.However,different from the result in Ref.[1],for moderate asymmetry the favored direction of 2q is between the orthogonal and parallel orientations.