scholarly journals Lowest-order constrained variational calculation forβ-stable matter at finite temperature

2000 ◽  
Vol 62 (4) ◽  
Author(s):  
M. Modarres ◽  
H. R. Moshfegh
Keyword(s):  
Finite Temperature ◽  
Variational Calculation

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 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.

scholarly journals Unblocking of stellar electron capture for neutron-rich N=50 nuclei at finite temperature

2020 ◽  
Vol 101 (2) ◽  
Author(s):  
Alan A. Dzhioev ◽  
K. Langanke ◽  
G. Martínez-Pinedo ◽  
A. I. Vdovin ◽  
Ch. Stoyanov
Keyword(s):  
Electron Capture ◽  
Finite Temperature
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