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Anomalous thermodynamics and phase transitions of neutron-star matter

Abstract : In this letter we show that the presence of the long-range Coulomb force in dense stellar matter implies that the total charge cannot be associated with a chemical potential, even if it is a conserved quantity. As a further consequence, the analytical properties of the partition sum are modified, changing the order of the phase transitions and affecting the possible occurrence of critical behaviours. The peculiar thermodynamic properties of the system can be understood introducing a model hamiltonian in which each charge is independently neutralized by a uniform background of opposite charge.
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Contributor : Camille Ducoin <>
Submitted on : Wednesday, June 20, 2007 - 6:27:52 PM
Last modification on : Tuesday, February 19, 2019 - 10:02:03 AM
Long-term archiving on: : Tuesday, September 21, 2010 - 1:03:48 PM

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P. Chomaz, F. Gulminelli, C. Ducoin, P. Napolitani, K. Hasnaoui. Anomalous thermodynamics and phase transitions of neutron-star matter. Physical Review C, American Physical Society, 2007, 75, pp.065805. ⟨10.1103/PhysRevC.75.065805⟩. ⟨in2p3-00024440v2⟩

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