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Ising analogue to compact-star matter.

P Napolitani¹, Ph Chomaz, F Gulminelli

¹GANIL (DSM-CEA/IN2P3-CNRS), Boulevard H. Becquerel, F-14076 Caen cédex, France.

Physical Review Letters

|May 16, 2007

Summary

Coulomb frustration expands the temperature range for nuclear liquid-gas phase transitions in compact stars. However, the phase-coexistence region

Area of Science:

Nuclear physics
Astrophysics
Thermodynamics

Background:

Understanding the behavior of nuclear matter under extreme conditions is crucial for astrophysics.
The nuclear liquid-gas phase transition is a key phenomenon in dense matter.
Coulomb interactions can significantly influence phase transitions in charged systems.

Purpose of the Study:

To investigate the impact of Coulomb frustration on the nuclear liquid-gas phase transition.
To construct an Ising analogue of compact-star matter at subsaturation density.
To explore the thermodynamic and astrophysical implications of these findings.

Main Methods:

Construction of an Ising analogue model for compact-star matter.
Simulation of nuclear matter at subsaturation densities.

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Analysis of phase transitions under varying Coulomb-field strengths.

Main Results:

The temperature range for inhomogeneous phase formation expands with increasing Coulomb-field strength.
The limiting point of the phase-coexistence region shows no critical behavior under the uniform electron distribution approximation.
Coulomb frustration plays a significant role in modifying the nuclear liquid-gas phase transition.

Conclusions:

Coulomb frustration broadens the temperature range for inhomogeneous phases in nuclear matter.
The absence of critical behavior at the phase-coexistence limit suggests unique thermodynamic properties.
Findings have potential implications for understanding compact-star interiors and dense matter physics.