Correlated density-dependent chiral forces for infinite matter calculations within the Green’s function approach
نویسندگان
چکیده
The properties of symmetric nuclear and pure neutron matter are investigated within an extended self-consistent Green’s function method that includes the effects of three-body forces. We use the ladder approximation for the study of infinite nuclear matter and incorporate the three-body interaction by means of a density-dependent two-body force. This force is obtained via a correlated average over the third particle, with an in-medium propagator consistent with the many-body calculation we perform. We analyze different prescriptions in the construction of the average, and conclude that correlations provide small modifications at the level of the density-dependent force. Microscopic as well as bulk properties are studied, focusing on the changes introduced by the density dependent two-body force. The total energy of the system is obtained by means of a modified Galitskii-Migdal-Koltun sum rule. Our results validate previously used uncorrelated averages and extend the availability of chirally motivated forces to a larger density regime.
منابع مشابه
Rectification Ratio Enhancement and Functionalized Pyrene: DFT+NEGF
Electron transport properties of pure and Oxygen and/or Methyl substituted pyrene between two semi-infinite Aluminum atomic electrodes have been investigated by means of density functional theory plus the non-equilibrium green’s function method. The electrodes were represented by a slab of Al atoms oriented along the [111] plane. The computations were carried out in the bias voltage range of 0....
متن کاملTensor force effects and high-momentum components in the nuclear symmetry energy
We analyze microscopic many-body calculations of the nuclear symmetry energy and its density dependence. The calculations are performed in the framework of the Brueckner–Hartree–Fock and the Self– Consistent Green’s Functions methods. Within Brueckner–Hartree–Fock, the Hellmann–Feynman theorem gives access to the kinetic energy contribution as well as the contributions of the different componen...
متن کاملخواص ترابرد الکترونی نانولوله کربنی فلز - نیمرسانا - فلز
In this work, we study electronic transport properties of a quasi-one dimensional pure semi-conducting Zigzag Carbon Nanotube (CNT) attached to semi-infinite clean metallic Zigzag CNT leads, taking into account the influence of topological defect in junctions. This structure may behave like a field effect transistor. The calculations are based on the tight-binding model and Green’s function me...
متن کاملSize-Dependent Green’s Function for Bending of Circular Micro Plates Under Eccentric Load
In this paper, a Green’s function is developed for bending analysis of micro plates under an asymmetric load. In order to consider the length scale effect, the modified couple stress theory is used. This theory can accurately predict the behavior of micro structures. A thin micro plate is considered and therefore the classical plate theory is utilized. The size dependent governing equilibrium e...
متن کاملSpectral Functions of Quarks in Quark Matter⋆
We present a simple albeit self-consistent approach to the spectral function of light quarks in infinite quark matter. Relations between correlation functions and collision rates are used to calculate the spectral function in an iterative procedure. The quark interactions are described by the SU(2) Nambu– Jona-Lasinio model. Calculations were performed in the chirally restored phase at zero tem...
متن کامل