232 research outputs found
LOCV calculations for polarized liquid with the spin-dependent correlation
We have used the lowest order constrained variational (LOCV) method to
calculate some ground state properties of polarized liquid at zero
temperature with the spin-dependent correlation function employing the
Lennard-Jones and Aziz pair potentials. We have seen that the total energy of
polarized liquid increases by increasing polarization. For all
polarizations, it is shown that the total energy in the spin-dependent case is
lower than the spin-independent case. We have seen that the difference between
the energies of spin-dependent and spin-independent cases decreases by
increasing polarization. We have shown that the main contribution of the
potential energy comes from the spin-triplet state.Comment: 14 pages, 5 figures. Int. J. Mod. Phys. B (2008) in pres
Saturation properties of nuclear matter in the presence of strong magnetic field
Different saturation properties of cold symmetric nuclear matter in the
strong magnetic field have been considered. We have seen that for magnetic
fields about , {for both cases with and without
nucleon anomalous magnetic moments}, the saturation density and saturation
energy grow by increasing the magnetic field. It is indicated that the magnetic
susceptibility of symmetric nuclear matter becomes negative showing the
diamagnetic response especially at . We have found
that for the nuclear matter, the magnitude of orbital magnetization reaches the
higher values comparing to the spin magnetization. Our results for the
incompressibility show that at high enough magnetic fields, i.e. , {the softening of equation of state caused by Landau
quantization is overwhelmed by stiffening due to the magnetization of nuclear
matter.} We have shown that the effects of strong magnetic field on nuclear
matter may affect the constraints on the equation of state of symmetric nuclear
matter obtained applying the experimental observable.Comment: 16 pages, 1 table, 7 figures, European Physical Journal A 52 (2016)
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Computation of Neutron Star Structure Using Modern Equation of State
Using the modern equations of state derived from microscopic calculations, we
have calculated the neutron star structure. For the neutron star, we have
obtained a minimum mass about which is nearly independent
of the equation of state, and a maximum mass between and
which is strongly dependent on the equation of state. It
is shown that among the equations of state of neutron star matter which we have
used, the stiffest one leads to higher maximum mass and radius and lower
central density. It is seen that the given maximum mass for the Reid-93
equation of state shows a good consistency with the accurate observations of
radio pulsars. We have indicated that the thickness of neutron star crust is
very small compared to the predicted neutron star radius.Comment: 16 pages, 6 figure
Spin polarized liquid 3He
We have employed the constrained variational method to study the influence of
spin polarization on the ground state properties of liquid . The
spin polarized phase, we have found, has stronger correlation with respect to
the unpolarized phase. It is shown that the internal energy of liquid increases by increasing polarization with no crossing point between
polarized and unpolarized energy curves over the liquid density range. The
obtained internal energy curves show a bound state, even in the case of fully
spin polarized matter. We have also investigated the validity of using a
parabolic formula for calculating the energy of spin polarized liquid . Finally, we have compared our results with other calculations.Comment: 16 pages, 6 figure
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