Publications (41)
Localized form of Fock terms in nuclear covariant density functional theory
Haozhao Liang, Pengwei Zhao, Peter Ring +2
In most of the successful versions of covariant density functional theory in nuclei, the Fock terms are not included explicitly, which leads to local functionals and forms the basi…
Nuclear structure in strong magnetic fields: nuclei in the crust of a magnetar
Daniel Pena Arteaga, Marcella Grasso, Elias Khan +1
Covariant density functional theory is used to study the effect of strong magnetic fields, up to the limit predicted for neutron stars (for magnetars G), on nucle…
Nuclear matter in relativistic Brueckner-Hartree-Fock theory with Bonn potential in the full Dirac space
Sibo Wang, Qiang Zhao, Peter Ring +1
Starting from the Bonn potential, relativistic Brueckner-Hartree-Fock (RBHF) equations are solved for nuclear matter in the full Dirac space, which provides a unique way to determi…
Relativistic Brueckner-Hartree-Fock theory for neutron drops
Shihang Shen, Haozhao Liang, Jie Meng +2
Neutron drops confined in an external field are studied in the framework of relativistic Brueckner-Hartree-Fock theory using the bare nucleon-nucleon interaction. The ground state…
Spin symmetry in the Dirac sea derived from the bare nucleon-nucleon interaction
Shihang Shen, Haozhao Liang, Jie Meng +2
The spin symmetry in the Dirac sea has been investigated with relativistic Brueckner-Hartree-Fock theory using the bare nucleon-nucleon interaction. Taking the nucleus O as…
Symmetry-Projected Hartree-Fock-Bogoliubov Equations
Javid A. Sheikh, Peter Ring
Symmetry-projected Hartree-Fock-Bogoliubov (HFB) equations are derived using the variational ansatz for the generalized one-body density-matrix in the Valatin form. It is shown tha…
Nuclear ground-state properties probed by the relativistic Hartree-Bogoliubov approach
Zi Xin Liu, Yi Hua Lam, Ning Lu +1
Using the relativistic Hartree-Bogoliubov framework with separable pairing force coupled with the latest covariant density functionals, i.e., PC-L3R, PC-X, DD-PCX, and DD-MEX, we s…
Speed of sound bounds and first-order phase transitions in compact stars
P. Laskos-Patkos, G. A. Lalazissis, Sibo Wang +3
In the present study, we employ three distinct, physically motivated speed of sound bounds to construct hybrid models, where the high-density phase is described by the maximally st…
Axially deformed relativistic Hartree Bogoliubov with separable pairing force
Yuan Tian, Zhongyu Ma, Peter Ring
A separable form of pairing interaction in the channel has been introduced and successfully applied in the description of both static and dynamic properties of superflu…
Asymmetric Nuclear Matter and Neutron Star Properties in Relativistic ab initio Theory in the Full Dirac Space
Sibo Wang, Hui Tong, Qiang Zhao +3
The long-standing controversy about the isospin dependence of the effective Dirac mass in ab initio calculations of asymmetric nuclear matter is clarified by solving the relativist…
Mode-coupling and the pygmy dipole resonance in a relativistic two-phonon model
Elena Litvinova, Peter Ring, Victor Tselyaev
A two-phonon version of the relativistic quasiparticle time blocking approximation (RQTBA-2) represents a new class of many-body models for nuclear structure calculations based on…
Tensor-force effects on nuclear matter in relativistic ab initio theory
Sibo Wang, Hui Tong, Chencan Wang +3
Within the relativistic Brueckner-Hartree-Fock theory in the full Dirac space, the tensor-force effects on infinite nuclear matter are elucidated by subtracting the matrix elements…
Relativistic Brueckner-Hartree-Fock Theory in Infinite Nuclear Matter
Peter Ring, Sibo Wang, Qiang Zhao +1
On the way of a microscopic derivation of covariant density functionals, the first complete solution of the relativistic Brueckner-Hartree-Fock (RBHF) equations is presented for sy…
Effects of tensor forces in nuclear spin-orbit splittings from ab initio calculations
Shihang Shen, Haozhao Liang, Jie Meng +2
A systematic and specific pattern due to the effects of the tensor forces is found in the evolution of spin-orbit splittings in neutron drops. This result is obtained from relativi…
Many-body approach to superfluid nuclei in axial geometry
Yinu Zhang, Antonio BjelÄiÄ, Tamara NikÅ¡iÄ +3
Starting from a general many-body fermionic Hamiltonian, we derive the equations of motion (EOM) for nucleonic propagators in a superfluid system. The resulting EOM is of the Dyson…
Regular and chaotic dynamics in time-dependent relativistic mean-field theory
Dario Vretenar, Peter Ring, Georgios A. Lalazissis +1
Isoscalar and isovector monopole oscillations that correspond to giant resonances in spherical nuclei are described in the framework of time-dependent relativistic mean-field theor…
Shape evolution of krypton isotopes calculated with axially deformed relativistic Hartree-Bogoliubov approach
Zi Xin Liu, Yi Hua Lam, Peter Ring
We perform a systematic study of the structure and properties of the krypton isotopic chain including both even-even and odd- nuclei based on the axially deformed relativistic H…
Leading order relativistic chiral nucleon-nucleon interaction
Xiu-Lei Ren, Kai-Wen Li, Li-Sheng Geng +3
Motivated by the successes of relativistic theories in studies of atomic/molecular and nuclear systems and the need for a relativistic chiral force in relativistic nuclear structur…
Effects of Tensor Force in the Relativistic Scheme: A Case Study of Neutron Drops
Shihang Shen, Haozhao Liang, Jie Meng +2
Tensor force is an important component in the nucleon-nucleon interaction, nevertheless, the role of the tensor force in the spin properties in finite nuclei is much less clear. In…
Deformed relativistic Hartree-Bogoliubov model for exotic nuclei
Shan-Gui Zhou, Jie Meng, Peter Ring
A deformed relativistic Hartree-Bogoliubov (DRHB) model is developed aiming at a proper description of exotic nuclei, particularly deformed ones with large spatial extension. In or…
Influence of pairing correlations on the radius of neutron-rich nuclei
Ying Zhang, Ying Chen, Jie Meng +1
The influence of pairing correlations on the neutron root mean square (rms) radius of nuclei is investigated in the framework of self-consistent Skyrme Hartree-Fock-Bogoliubov calc…
Nuclear halo structure and pseudo-spin symmetry
Wen Hui Long, Peter Ring, Jie Meng +2
Nuclear halo structure and restoration of relativistic symmetry are studied within the framework of the relativistic Hartree-Fock-Bogoliubov (RHFB) theory. Giant halos as well as o…
Accurate relativistic chiral nucleon-nucleon interaction up to NNLO
Jun-Xu Lu, Chun-Xuan Wang, Yang Xiao +3
We construct a relativistic chiral nucleon-nucleon interaction up to the next-to-next-to-leading order in covariant baryon chiral perturbation theory. We show that a good descripti…
Relativistic two-phonon model for low-energy nuclear response
Elena Litvinova, Peter Ring, Victor Tselyaev
A two-phonon version of the relativistic quasiparticle time blocking approximation introduces as a new class of many-body models for nuclear structure calculations based on the cov…
Relativistic Study of Medium Polarization Effects on Superfluidity in Nuclear Matter
Masayuki Matsuzaki, Peter Ring
Effects of the Fermi-sea polarization on the superfluidity in nuclear matter are studied in a framework of quantum hadrodynamics. The particle-hole polarization due to and $Ï…
The optimized point-coupling interaction for the relativistic energy density functional of Hartree-Bogoliubov approach quantifying the nuclear bulk properties
Zi Xin Liu, Yi Hua Lam, Ning Lu +1
We propose a newly optimized nonlinear point-coupling parameterized interaction, PC-L3R, for the relativistic Hartree-Bogoliubov framework with a further optimized separable pairin…
Relativistic Brueckner-Hartree-Fock in nuclear matter without the average momentum approximation
Hui Tong, Xiu-Lei Ren, Peter Ring +3
Brueckner-Hartree-Fock theory allows to derive the -matrix as an effective interaction between nucleons in the nuclear medium. It depends on the center of mass momentum …
Relativistic Hartree-Fock-Bogoliubov theory with Density Dependent Meson-Nucleon Couplings
Wen Hui Long, Peter Ring, Nguyen Van Giai +1
Relativistic Hartree-Fock-Bogoliubov (RHFB) theory with density-dependent meson-nucleon couplings is presented. The integro-differential RHFB equations are solved by expanding the…
Relativistic Nuclear Energy Density Functionals: Mean-Field and Beyond
Tamara Niksic, Dario Vretenar, Peter Ring
Relativistic energy density functionals (EDF) have become a standard tool for nuclear structure calculations, providing a complete and accurate, global description of nuclear groun…
Relativistic Brueckner-Hartree-Fock theory for finite nuclei
Shihang Shen, Jinniu Hu, Haozhao Liang +3
Starting with a bare nucleon-nucleon interaction, for the first time the full relativistic Brueckner-Hartree-Fock equations are solved for finite nuclei in a Dirac-Woods-Saxon basi…
A Separable Pairing Force for Relativistic Quasiparticle Random Phase Approximation
Yuan Tian, Zhongyu Ma, Peter Ring
We have introduced a separable pairing force, which was adjusted to reproduce the pairing properties of the Gogny force in nuclear matter. This separable pairing force is able to d…
Implementation of the finite amplitude method for the relativistic quasiparticle random-phase approximation
Tamara Niksic, Nenad Kralj, Tea Tutis +2
A new implementation of the finite amplitude method (FAM) for the solution of the relativistic quasiparticle random-phase approximation (RQRPA) is presented, based on the relativis…
Spin-orbit splittings of neutron states in isotones from covariant density functionals and their extensions
Konstantinos Karakatsanis, G. A. Lalazissis, Peter Ring +1
Spin-orbit splitting is an essential ingredient for our understanding of the shell structure in nuclei. One of the most important advantages of relativistic mean-field (RMF) models…
Pairing strength on the nuclear size in relativistic continuum Hartree-Bogoliubov theory
Ying Chen, Peter Ring, Jie Meng
The influence of pairing correlations on the nuclear size and in particular on the formation of nuclear halos is studied in the framework of relativistic continuum Hartree-Bogoliub…
The isovector dipole strength in nuclei with extreme neutron excess
Daniel Pena Arteaga, E. Khan, Peter Ring
The E1 strength is systematically analyzed in very neutron-rich Sn nuclei, beyond Sn until Sn, within the Relativistic Quasiparticle Random Phase Approximation. The…
Microscopic optical potential from the relativistic Brueckner-Hartree-Fock theory: Proton-nucleus scattering
Pianpian Qin, Sibo Wang, Hui Tong +4
A relativistic microscopic optical model potential for nucleon-nucleus scattering is developed based on the \emph{ab initio} relativistic Brueckner-Hartree-Fock (RBHF) theory with…
Towards an ab initio covariant density functional for nuclear structure
Shihang Shen, Haozhao Liang, Wen Hui Long +2
Nuclear structure models built from phenomenological mean fields, the effective nucleon-nucleon interactions (or Lagrangians), and the realistic bare nucleon-nucleon interactions a…
Relativistic Hartree-Bogoliubov theory in coordinate space: finite element solution for a nuclear system with spherical symmetry
Wolfgang Poeschl, Dario Vretenar, Peter Ring
A C++ code for the solution of the relativistic Hartree-Bogoliubov theory in coordinate space is presented. The theory describes a nucleus as a relativistic system of baryons and m…
Neutron-proton effective mass splitting in neutron-rich matter
Sibo Wang, Hui Tong, Qiang Zhao +3
Nucleon effective masses in neutron-rich matter are studied with the relativistic Brueckner-Hartree-Fock (RBHF) theory in the full Dirac space. The neutron and proton effective mas…
Fully self-consistent relativistic Brueckner-Hartree-Fock theory for finite nuclei
Shihang Shen, Haozhao Liang, Jie Meng +2
Starting from the relativistic form of the Bonn potential as a bare nucleon-nucleon interaction, the full Relativistic Brueckner-Hartree-Fock (RBHF) equations are solved for finite…
Spherical Relativistic Hartree theory in a Woods-Saxon basis
Shan-Gui Zhou, Jie Meng, Peter Ring
The Woods-Saxon basis has been suggested to replace the widely used harmonic oscillator basis for solving the relativistic mean field (RMF) theory in order to generalize it to stud…