Using bare Argonne V4'(AV4'),V6'(AV6'),and V8'(AV8')nucleon–nucleon(NN)interactions,the nuclear equations of state(EOSs)for neutron matter are calculated with the unitary correlation operator ...Using bare Argonne V4'(AV4'),V6'(AV6'),and V8'(AV8')nucleon–nucleon(NN)interactions,the nuclear equations of state(EOSs)for neutron matter are calculated with the unitary correlation operator and high-momentum pair methods.Neutron matter is described using a finite particle number approach with magic number N=66 under a periodic boundary condition.The central short-range correlation originating from the short-range repulsion in the NN interaction is treated by the unitary correlation operator method(UCOM),and the tensor correlation and spin-orbit effects are described by the two-particle two-hole(2p2h)excitations of nucleon pairs,where the two nucleons with a large relative momentum are regarded as a high-momentum(HM)pair.With increasing 2p2h configurations,the total energy per particle of the neutron matter is well-converged under this UCOM+HM framework.Comparing the results calculated with AV4',AV6',and AV8'NN interactions,we demonstrate the effects of the short-range correlation,tensor correlation,and spin-orbit coupling on the density dependence of the total energy per particle of neutron matter.Moreover,the contribution of each Hamiltonian component to the total energy per particle is discussed.The EOSs of neutron matter calculated within the present UCOM+HM framework agree with the calculations of six microscopic many-body theories,especially the auxiliary field-diffusion Monte Carlo calculations.展开更多
基金Supported by the National Natural Science Foundation of China(11822503,11575082,11947220)by the Fundamental Research Funds for the Central Universities(Nanjing University)+2 种基金by JSPS KAKENHI(JP18K03660,JP16K05351)by a Project funded by China Postdoctoral Science Foundation(2019M661785)The author N.W.would like to thank the support from the foreign young research support program in RCNP,Osaka University。
文摘Using bare Argonne V4'(AV4'),V6'(AV6'),and V8'(AV8')nucleon–nucleon(NN)interactions,the nuclear equations of state(EOSs)for neutron matter are calculated with the unitary correlation operator and high-momentum pair methods.Neutron matter is described using a finite particle number approach with magic number N=66 under a periodic boundary condition.The central short-range correlation originating from the short-range repulsion in the NN interaction is treated by the unitary correlation operator method(UCOM),and the tensor correlation and spin-orbit effects are described by the two-particle two-hole(2p2h)excitations of nucleon pairs,where the two nucleons with a large relative momentum are regarded as a high-momentum(HM)pair.With increasing 2p2h configurations,the total energy per particle of the neutron matter is well-converged under this UCOM+HM framework.Comparing the results calculated with AV4',AV6',and AV8'NN interactions,we demonstrate the effects of the short-range correlation,tensor correlation,and spin-orbit coupling on the density dependence of the total energy per particle of neutron matter.Moreover,the contribution of each Hamiltonian component to the total energy per particle is discussed.The EOSs of neutron matter calculated within the present UCOM+HM framework agree with the calculations of six microscopic many-body theories,especially the auxiliary field-diffusion Monte Carlo calculations.
