scholarly journals An accurate equation of state for the one-component plasma in the low coupling regime

2010 ◽  
Vol 43 (10) ◽  
pp. 105501 ◽  
Author(s):  
Jean-Michel Caillol ◽  
Dominique Gilles
Keyword(s):  
Equation Of State ◽  
Component Plasma ◽  
The One

scholarly journals Crystallization of the outer crust of a non-accreting neutron star

2020 ◽  
Vol 633 ◽  
pp. A149 ◽  
Author(s):  
A. F. Fantina ◽  
S. De Ridder ◽  
N. Chamel ◽  
F. Gulminelli
Keyword(s):  
Neutron Star ◽  
Equation Of State ◽  
Coupling Parameter ◽  
Equilibrium Composition ◽  
Nuclear Model ◽  
Self Consistent ◽  
Component Plasma ◽  
Rotational Evolution ◽  
The One ◽  
Outer Crust

Context. The interior of a neutron star is usually assumed to be made of cold catalyzed matter. However, the outer layers are unlikely to remain in full thermodynamic equilibrium during the formation of the star and its subsequent cooling, especially after crystallization occurs. Aims. We study the cooling and the equilibrium composition of the outer layers of a non-accreting neutron star down to crystallization. Here the impurity parameter, generally taken as a free parameter in cooling simulations, is calculated self-consistently using a microscopic nuclear model for which a unified equation of state has recently been determined. Methods. We follow the evolution of the nuclear distributions of the multi-component Coulomb liquid plasma fully self-consistently, adapting a general formalism originally developed for the description of supernova cores. We calculate the impurity parameter at the crystallization temperature as determined in the one-component plasma approximation. Results. Our analysis shows that the sharp changes in composition obtained in the one-component plasma approximation are smoothed out when a full nuclear distribution is allowed. The Coulomb coupling parameter at melting is found to be reasonably close to the canonical value of 175, except for specific values of the pressure for which supercooling occurs in the one-component plasma approximation. Our multi-component treatment leads to non-monotonic variations of the impurity parameter with pressure. Its values can change by several orders of magnitude reaching about 50, suggesting that the crust may be composed of an alternation of pure (highly conductive) and impure (highly resistive) layers. The results presented here complement the recent unified equation of state obtained within the same nuclear model. Conclusions. Our self-consistent approach to hot dense multi-component plasma shows that the presence of impurities in the outer crust of a neutron star is non-negligible and may have a sizeable impact on transport properties. In turn, this may have important implications not only for the cooling of neutron stars, but also for their magneto-rotational evolution.

Equation of state of the one-component plasma derived from precision Monte Carlo calculations

1990 ◽  
Vol 41 (2) ◽  
pp. 1105-1111 ◽  
Author(s):  
Guy S. Stringfellow ◽  
Hugh E. DeWitt ◽  
W. L. Slattery
Keyword(s):  
Monte Carlo ◽  
Equation Of State ◽  
Monte Carlo Calculations ◽  
Component Plasma ◽  
The One

scholarly journals Temperature anisotropy relaxation of the one-component plasma

2017 ◽  
Vol 57 (6-7) ◽  
pp. 238-251 ◽  
Author(s):  
Scott D. Baalrud ◽  
Jérôme Daligault
Keyword(s):  
Temperature Anisotropy ◽  
Component Plasma ◽  
The One

Structure Factor Studies of Like Charges in the One-Component Plasma Approximation

1986 ◽  
Vol 93 (2) ◽  
pp. 443-448 ◽  
Author(s):  
R. V. Gopala Rao ◽  
Ratna Das
Keyword(s):  
Structure Factor ◽  
Component Plasma ◽  
The One

scholarly journals Dislocation-mediated melting:  The one-component plasma limit

2001 ◽  
Vol 63 (6) ◽  
Author(s):  
Leonid Burakovsky ◽  
Dean L. Preston
Keyword(s):  
Component Plasma ◽  
The One

scholarly journals Rotating Melvin-like Universes and Wormholes in General Relativity

Symmetry ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1306
Author(s):  
Kirill Bronnikov ◽  
Vladimir Krechet ◽  
Vadim Oshurko
Keyword(s):  
Magnetic Field ◽  
General Relativity ◽  
Equation Of State ◽  
Symmetry Axis ◽  
Energy Condition ◽  
Flat Space ◽  
Stiff Matter ◽  
Cylindrically Symmetric ◽  
The One ◽  
The Magnetic Field

We find a family of exact solutions to the Einstein–Maxwell equations for rotating cylindrically symmetric distributions of a perfect fluid with the equation of state p=wρ (|w|<1), carrying a circular electric current in the angular direction. This current creates a magnetic field along the z axis. Some of the solutions describe geometries resembling that of Melvin’s static magnetic universe and contain a regular symmetry axis, while some others (in the case w>0) describe traversable wormhole geometries which do not contain a symmetry axis. Unlike Melvin’s solution, those with rotation and a magnetic field cannot be vacuum and require a current. The wormhole solutions admit matching with flat-space regions on both sides of the throat, thus forming a cylindrical wormhole configuration potentially visible for distant observers residing in flat or weakly curved parts of space. The thin shells, located at junctions between the inner (wormhole) and outer (flat) regions, consist of matter satisfying the Weak Energy Condition under a proper choice of the free parameters of the model, which thus forms new examples of phantom-free wormhole models in general relativity. In the limit w→1, the magnetic field tends to zero, and the wormhole model tends to the one obtained previously, where the source of gravity is stiff matter with the equation of state p=ρ.

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