We perform a systematic calculation of the equation of state of asymmetric nuclear matter at finite temperature within the framework of the Brueckner-Hartree-Fock approach with a microscopic three-body force. When app...We perform a systematic calculation of the equation of state of asymmetric nuclear matter at finite temperature within the framework of the Brueckner-Hartree-Fock approach with a microscopic three-body force. When applying it to the study of hot kaon condensed matter, we find that the thermal effect is more profound in comparison with normal matter, in particular around the threshold density. Also, the increase of temperature makes the equation of state slightly stiffer through suppression of kaon condensation.展开更多
We study the properties of two-flavor quark matter in the equivparticle model.A new quark mass scaling at finite temperature is proposed and applied to the thermodynamics of two-flavor quark matter.It is found that th...We study the properties of two-flavor quark matter in the equivparticle model.A new quark mass scaling at finite temperature is proposed and applied to the thermodynamics of two-flavor quark matter.It is found that the perturbative interaction has strong effect on quark matter properties at finite temperature and high density.The pressure at the minimum free energy per baryon is exactly zero.With increasing temperature,the energy per baryon increases,while the free energy per baryon decreases.展开更多
The 3 P F2 superfluidity of neutron and proton is investigated in isospin-asymmetric nuclear matter within the Brueckner-Hartree-Fock approach and the BCS theory by adopting the Argonne V14 and the Argonne V18 nucleon...The 3 P F2 superfluidity of neutron and proton is investigated in isospin-asymmetric nuclear matter within the Brueckner-Hartree-Fock approach and the BCS theory by adopting the Argonne V14 and the Argonne V18 nucleonnucleon interactions. We find that pairing gaps in the 3PF2 channel predicted by adopting the AV14 interaction are much larger than those by the AV18 interaction. As the isospin-asymmetry increases, the neutron 3 pF2 superfluidity is found to increase rapidly, whereas the proton one turns out to decrease and may even vanish at high enough asymmetries. As a consequence, the neutron 3pF2 superfluidity is much stronger than the proton one at high asymmetries and it predominates over the proton one in dense neutron-rich matter.展开更多
We provide a microscopic calculation of neutron-proton and proton-proton cross sections in symmetric nuclear matter at various densities, using the Brueckner Hartree-Fock approximation scheme with the Argonne Va4 pote...We provide a microscopic calculation of neutron-proton and proton-proton cross sections in symmetric nuclear matter at various densities, using the Brueckner Hartree-Fock approximation scheme with the Argonne Va4 potential including the contribution of microscopic three-body force. We investigate separately the effects of three-body force on the effective mass and on the scattering amplitude. In the present calculation, the rearrangement contribution of three-body force is considered, which will reduce the neutron and proton effective mass, and depress the amplitude of cross section. The effect of three body force is shown to be repulsive, especially in high densities and large momenta, which will suppress the cross section markedly.展开更多
The efiects of microscopic three-body forces on the equatioil of state(EOS)and the single particle properties of isospin asymmetric nuclear matter have been studied within Brueckner-Hartree-Fock framework~[1]The micro...The efiects of microscopic three-body forces on the equatioil of state(EOS)and the single particle properties of isospin asymmetric nuclear matter have been studied within Brueckner-Hartree-Fock framework~[1]The microscopic three-body force model constructed from meson exchange current approach in Ref.~[2] has been extended to isospin asymmetric nuclear展开更多
In the present work,the self-energy effect on the superfluidity of neutron matter in the channel^1 So has been investigated in a generalized BCS theory.The ground-state correlations in the self-energy have been taken ...In the present work,the self-energy effect on the superfluidity of neutron matter in the channel^1 So has been investigated in a generalized BCS theory.The ground-state correlations in the self-energy have been taken into account.The result of the calculated energy gap is shown in Fig.1~[1]in which,the solid line indicates展开更多
Adopting the charge-dependent ArgonneV_(18) plus microscopic three-body forces,the equation of state(EOS) and single particle properties of symmetric nuclear matter have been investigated in Brueckner-Hartree-Fock(BHF...Adopting the charge-dependent ArgonneV_(18) plus microscopic three-body forces,the equation of state(EOS) and single particle properties of symmetric nuclear matter have been investigated in Brueckner-Hartree-Fock(BHF) framework~[1].The microscopic three-body force展开更多
Within the isospin-dependent extended Brueckner-Hartree-Fock ( IEBHF ) framework, the proton and neutron mean free paths in isospin asymmetric nuclear matter and their isospin dependence have been investigated. It is ...Within the isospin-dependent extended Brueckner-Hartree-Fock ( IEBHF ) framework, the proton and neutron mean free paths in isospin asymmetric nuclear matter and their isospin dependence have been investigated. It is found that as increasing the isospin asymmetry, the proton mean free path decreases while the neutron one increases. This implies that the surface of a neutron-rich nuclei near drip-line will be much展开更多
The critical properties of the liquid-gas phase transition of hot nuclear matter have been investigated within the finite temperature Brueckner-Hartree-Fook (FTBHF) approach extended by introducing a microscopic three...The critical properties of the liquid-gas phase transition of hot nuclear matter have been investigated within the finite temperature Brueckner-Hartree-Fook (FTBHF) approach extended by introducing a microscopic three-body force (TBF). In Fig.1 is plotted the calculated equation of state (EOS) of symmetric nuclear matter, where the solid and dashed isothermal curves of pressure (corresponding to T = 0,8,10,12,14,16 MeV from the展开更多
The effect of a microscopic nuclear three-body force (TBF) on the critical baryon density ρc for kaon condensation in chemical equilibrium neutron star matter has been investigated in the framework of the Brueckner-H...The effect of a microscopic nuclear three-body force (TBF) on the critical baryon density ρc for kaon condensation in chemical equilibrium neutron star matter has been investigated in the framework of the Brueckner-Hartree-Fock approach. The calculated values of the critical density are given in Tab.1 for both cases with and without including the TBF contribution and for three different choices of the proton strangeness content (i.e.,展开更多
The three-body force ( TBF ) effect on the proton fraction in the β-stable neutron star matter has been investigated within the iso-spin dependent Brueckner Hartree-Fock ( BHF ) framework, by adopting the microscopic...The three-body force ( TBF ) effect on the proton fraction in the β-stable neutron star matter has been investigated within the iso-spin dependent Brueckner Hartree-Fock ( BHF ) framework, by adopting the microscopic TBF based on a meson-exchange current model of interaction mediated by the excitation of NN couples and low-lying nucleon resonances The calculated proton fraction vs. baryon density is displayed展开更多
In the present work, the influence of three-body force(TBF) on the 1S0 pairing in symmetric nuclear matter and pure neutron matter has been investigated. The energy gap is calculated within the standard BCS scheme. Th...In the present work, the influence of three-body force(TBF) on the 1S0 pairing in symmetric nuclear matter and pure neutron matter has been investigated. The energy gap is calculated within the standard BCS scheme. The AV18 force is adopted as the two-body realistic nucleon-nucleon interaction. The microscopic three-body force adopted in the present calculations is constructed from a meson-exchange current展开更多
Within the spin-dependent Brueckner-Hatree-Fock framework, the equation of state ( EOS ) of the spin-polarized neutron matter has been investigated by adopting the realistic nucleon-nucleon interaction AV18 supplement...Within the spin-dependent Brueckner-Hatree-Fock framework, the equation of state ( EOS ) of the spin-polarized neutron matter has been investigated by adopting the realistic nucleon-nucleon interaction AV18 supplemented with the microscopic three-body force ( TBF ) based on the meson-exchange current method. The related physical quantities such as spin-symmetry energy, magnetic susceptibility and the Landau param-展开更多
Within the framework of the Brueckner-Hartree-Fock approach, the effect of a microscopic nuclear three-body force (TBF) on the composition of the kaon condensed phase in chemical equilibrium neutron star matter has be...Within the framework of the Brueckner-Hartree-Fock approach, the effect of a microscopic nuclear three-body force (TBF) on the composition of the kaon condensed phase in chemical equilibrium neutron star matter has been studied. In Fig.1 is plotted the composition of neutron star matter for three different values of a3ms. The kaon condensed phase of neutron star matter turns out to be proton-rich instead of neutron-rich. The three-body force has an important influence on the composition of the kaon condensed phase. Inclusion of the three-body force contribution in the nuclear symmetry energy results in a significant reduction of the proton and kaon fractions in the kaon condensed phase which is more proton-rich in the case of no three-body force. The equation of state of neuron star matter is found to be softened considerably by the kaon-nucleon interaction in the kaon condensed phase.展开更多
We explore the mechanism of the isospin splitting of neutron and proton effective masses in neutronrich nuclear matter within the framework of the Brueckner-Hartree-Fock (BHF) approach. First we find that the neutron-...We explore the mechanism of the isospin splitting of neutron and proton effective masses in neutronrich nuclear matter within the framework of the Brueckner-Hartree-Fock (BHF) approach. First we find that the neutron-proton effective mass splitting in neutron-rich matter is dominated by the nonlocality of the microscopic s. p. potentials in spatial space,i. e.,by the isospin splitting of the k-mass shown in Fig.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 10575119, the Knowledge Innovation Project of Chinese Academy of Sciences under Grant No KJCX3-SYW-N2, and the Asia-Europe Link project （CN/ASIA-LINK/008（94791）） of the European Commission.
文摘We perform a systematic calculation of the equation of state of asymmetric nuclear matter at finite temperature within the framework of the Brueckner-Hartree-Fock approach with a microscopic three-body force. When applying it to the study of hot kaon condensed matter, we find that the thermal effect is more profound in comparison with normal matter, in particular around the threshold density. Also, the increase of temperature makes the equation of state slightly stiffer through suppression of kaon condensation.
基金supported by the National Natural Science Foundation of China(Nos.11135011,11475110,and 11575190)the CAS Present’s International Fellowship Initiative(Nos.2015PM008 and2016VMA063)
文摘We study the properties of two-flavor quark matter in the equivparticle model.A new quark mass scaling at finite temperature is proposed and applied to the thermodynamics of two-flavor quark matter.It is found that the perturbative interaction has strong effect on quark matter properties at finite temperature and high density.The pressure at the minimum free energy per baryon is exactly zero.With increasing temperature,the energy per baryon increases,while the free energy per baryon decreases.
基金Supported by the National Natural Science Foundation of China under Grant Nos. 10575119, 10875151, 10811130077, and 10811130560the Knowledge Innovation Project (KJCX3-SYW-N2) of the Chinese Academy of Sciences+2 种基金the Major State Basic Research Developing Program of China under Grant No. 2007CB815004the CAS/SAFEA International Partnership Program for Creative Research Teams(CXTD-J2005-1) of Chinese Academy of Sciencesthe Asia-Link project (CN/ASIA-LINK/008(94791)) of the European Commission
文摘The 3 P F2 superfluidity of neutron and proton is investigated in isospin-asymmetric nuclear matter within the Brueckner-Hartree-Fock approach and the BCS theory by adopting the Argonne V14 and the Argonne V18 nucleonnucleon interactions. We find that pairing gaps in the 3PF2 channel predicted by adopting the AV14 interaction are much larger than those by the AV18 interaction. As the isospin-asymmetry increases, the neutron 3 pF2 superfluidity is found to increase rapidly, whereas the proton one turns out to decrease and may even vanish at high enough asymmetries. As a consequence, the neutron 3pF2 superfluidity is much stronger than the proton one at high asymmetries and it predominates over the proton one in dense neutron-rich matter.
基金supported by the Asia-Link project(CN/ASIA-LINK/008(94791))of the European Commissionin part by National Natural Science Foundation of China under Grant Nos.10775061,10505016,10575119,and 10175074+1 种基金the Knowledge Innovative Project of CAS under Grant No.KJCX3-SYW-N2the Major Prophase Research Project of Fundamental Research of the Ministry of Science and Technology of China under Grant No.2007CB815004
文摘We provide a microscopic calculation of neutron-proton and proton-proton cross sections in symmetric nuclear matter at various densities, using the Brueckner Hartree-Fock approximation scheme with the Argonne Va4 potential including the contribution of microscopic three-body force. We investigate separately the effects of three-body force on the effective mass and on the scattering amplitude. In the present calculation, the rearrangement contribution of three-body force is considered, which will reduce the neutron and proton effective mass, and depress the amplitude of cross section. The effect of three body force is shown to be repulsive, especially in high densities and large momenta, which will suppress the cross section markedly.
文摘The efiects of microscopic three-body forces on the equatioil of state(EOS)and the single particle properties of isospin asymmetric nuclear matter have been studied within Brueckner-Hartree-Fock framework~[1]The microscopic three-body force model constructed from meson exchange current approach in Ref.~[2] has been extended to isospin asymmetric nuclear
文摘In the present work,the self-energy effect on the superfluidity of neutron matter in the channel^1 So has been investigated in a generalized BCS theory.The ground-state correlations in the self-energy have been taken into account.The result of the calculated energy gap is shown in Fig.1~[1]in which,the solid line indicates
文摘Adopting the charge-dependent ArgonneV_(18) plus microscopic three-body forces,the equation of state(EOS) and single particle properties of symmetric nuclear matter have been investigated in Brueckner-Hartree-Fock(BHF) framework~[1].The microscopic three-body force
文摘Within the isospin-dependent extended Brueckner-Hartree-Fock ( IEBHF ) framework, the proton and neutron mean free paths in isospin asymmetric nuclear matter and their isospin dependence have been investigated. It is found that as increasing the isospin asymmetry, the proton mean free path decreases while the neutron one increases. This implies that the surface of a neutron-rich nuclei near drip-line will be much
文摘The critical properties of the liquid-gas phase transition of hot nuclear matter have been investigated within the finite temperature Brueckner-Hartree-Fook (FTBHF) approach extended by introducing a microscopic three-body force (TBF). In Fig.1 is plotted the calculated equation of state (EOS) of symmetric nuclear matter, where the solid and dashed isothermal curves of pressure (corresponding to T = 0,8,10,12,14,16 MeV from the
文摘The effect of a microscopic nuclear three-body force (TBF) on the critical baryon density ρc for kaon condensation in chemical equilibrium neutron star matter has been investigated in the framework of the Brueckner-Hartree-Fock approach. The calculated values of the critical density are given in Tab.1 for both cases with and without including the TBF contribution and for three different choices of the proton strangeness content (i.e.,
文摘The three-body force ( TBF ) effect on the proton fraction in the β-stable neutron star matter has been investigated within the iso-spin dependent Brueckner Hartree-Fock ( BHF ) framework, by adopting the microscopic TBF based on a meson-exchange current model of interaction mediated by the excitation of NN couples and low-lying nucleon resonances The calculated proton fraction vs. baryon density is displayed
文摘In the present work, the influence of three-body force(TBF) on the 1S0 pairing in symmetric nuclear matter and pure neutron matter has been investigated. The energy gap is calculated within the standard BCS scheme. The AV18 force is adopted as the two-body realistic nucleon-nucleon interaction. The microscopic three-body force adopted in the present calculations is constructed from a meson-exchange current
文摘Within the spin-dependent Brueckner-Hatree-Fock framework, the equation of state ( EOS ) of the spin-polarized neutron matter has been investigated by adopting the realistic nucleon-nucleon interaction AV18 supplemented with the microscopic three-body force ( TBF ) based on the meson-exchange current method. The related physical quantities such as spin-symmetry energy, magnetic susceptibility and the Landau param-
文摘Within the framework of the Brueckner-Hartree-Fock approach, the effect of a microscopic nuclear three-body force (TBF) on the composition of the kaon condensed phase in chemical equilibrium neutron star matter has been studied. In Fig.1 is plotted the composition of neutron star matter for three different values of a3ms. The kaon condensed phase of neutron star matter turns out to be proton-rich instead of neutron-rich. The three-body force has an important influence on the composition of the kaon condensed phase. Inclusion of the three-body force contribution in the nuclear symmetry energy results in a significant reduction of the proton and kaon fractions in the kaon condensed phase which is more proton-rich in the case of no three-body force. The equation of state of neuron star matter is found to be softened considerably by the kaon-nucleon interaction in the kaon condensed phase.
文摘We explore the mechanism of the isospin splitting of neutron and proton effective masses in neutronrich nuclear matter within the framework of the Brueckner-Hartree-Fock (BHF) approach. First we find that the neutron-proton effective mass splitting in neutron-rich matter is dominated by the nonlocality of the microscopic s. p. potentials in spatial space,i. e.,by the isospin splitting of the k-mass shown in Fig.
