scholarly journals Lowest order constrained variational calculation of polarized neutron matter at finite temperature

2008 ◽  
Vol 78 (5) ◽  
Author(s):  
G. H. Bordbar ◽  
M. Bigdeli
Keyword(s):  
Finite Temperature ◽  
Variational Calculation ◽  
Neutron Matter ◽  
Polarized Neutron

scholarly journals Microscopic calculations of spin polarized neutron matter at finite temperature

2006 ◽  
Vol 632 (5-6) ◽  
pp. 638-643 ◽  
Author(s):  
I. Bombaci ◽  
A. Polls ◽  
A. Ramos ◽  
A. Rios ◽  
I. Vidaña
Keyword(s):  
Finite Temperature ◽  
Neutron Matter ◽  
Spin Polarized ◽  
Polarized Neutron

Equation of state for pion-condensed neutron matter at finite temperature

1978 ◽  
Vol 78 (5) ◽  
pp. 547-551 ◽  
Author(s):  
H. Toki ◽  
Y. Futami ◽  
W. Weise
Keyword(s):  
Equation Of State ◽  
Finite Temperature ◽  
Neutron Matter

TOWARD A NEW PARAMETERIZATION OF THE GOGNY FORCE: NEUTRON MATTER AND NUCLEAR BINDING ENERGIES

2006 ◽  
Vol 15 (02) ◽  
pp. 339-345 ◽  
Author(s):  
F. CHAPPERT ◽  
M. GIROD
Keyword(s):  
Equation Of State ◽  
Nuclear Matter ◽  
Variational Calculation ◽  
Binding Energies ◽  
Neutron Matter ◽  
Saturation Point ◽  
Nuclear Binding

A new parameterization of the effective Gogny interaction is investigated. It has the property of fitting the neutron matter Equation Of State (EOS) as predicted by a variational calculation. Its properties in nuclear matter (saturation point, compressibility, …) and in nuclei (binding energies) are presented.

Magnetized liquid 3He at finite temperature: A variational calculation approach

2016 ◽  
Vol 30 (22) ◽  
pp. 1650129 ◽  
Author(s):  
Gholam Hossein Bordbar ◽  
Mohammad Taghi Mohammadi Sabet
Keyword(s):  
Magnetic Field ◽  
Experimental Data ◽  
Correlation Function ◽  
Finite Temperature ◽  
Spin Correlation ◽  
Energy Functional ◽  
Variational Calculation ◽  
A Value ◽  
Dependent Correlation ◽  
Good Agreement

Using the spin-dependent (SD) and spin-independent (SI) correlation functions, we have investigated the properties of liquid [Formula: see text] in the presence of magnetic field at finite temperature. Our calculations have been done using the variational method based on cluster expansion of the energy functional. Our results show that the low field magnetic susceptibility obeys Curie law at high temperatures. This behavior is in a good agreement with the experimental data as well as the molecular field theory results in which the spin dependency has been introduced in correlation function. Reduced susceptibility as a function of temperature as well as reduced temperature has been also investigated, and again we have seen that the spin-dependent correlation function leads to a good agreement with the experimental data. The Landau parameter, [Formula: see text], has been calculated, and for this parameter, a value about [Formula: see text] has been found in the case of spin–spin correlation. In the case of spin-independent correlation function, this value is about [Formula: see text]. Therefore, inclusion of spin dependency in the correlation function leads to a more compatible value of [Formula: see text] with experimental data. The magnetization and susceptibility of liquid [Formula: see text] have also been investigated as a function of magnetic field. Our results show a downward curvature in magnetization of system with spin-dependent correlation for all densities and relevant temperatures. A metamagnetic behavior has been observed as a maximum in susceptibility versus magnetic field, when the spin–spin correlation has been considered. This maximum occurs at [Formula: see text] for all densities and temperatures. This behavior has not been observed in the case of spin-independent correlation function.

scholarly journals Role of correlations in spin-polarized neutron matter

2016 ◽  
Vol 94 (5) ◽  
Author(s):  
Isaac Vidaña ◽  
Artur Polls ◽  
Victoria Durant
Keyword(s):  
Neutron Matter ◽  
Spin Polarized ◽  
Polarized Neutron

scholarly journals LOWEST ORDER CONSTRAINED VARIATIONAL CALCULATION FOR POLARIZED LIQUID 3He AT FINITE TEMPERATURE

2009 ◽  
Vol 23 (01) ◽  
pp. 113-123 ◽  
Author(s):  
G. H. BORDBAR ◽  
M. J. KARIMI ◽  
J. VAHEDI
Keyword(s):  
Free Energy ◽  
Thermodynamic Properties ◽  
Variational Method ◽  
Specific Heat ◽  
Finite Temperature ◽  
Variational Calculation ◽  
Saturation Density ◽  
Energy Entropy ◽  
Spin Polarized

We have investigated some of the thermodynamic properties of spin-polarized liquid 3 He at finite temperature using the lowest order constrained variational method. For this system, the free energy, entropy and pressure are calculated for different values of the density, temperature and polarization. We have also presented the dependence of specific heat, saturation density and incompressibility on temperature and polarization.

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