Ferromagnetism of quark liquid

Abstract

Usually it is believed that the Hartree-Fock state of quark matter is a Fermi gas state with no polarisation of spins. We examine the possibility of the polarised quark liquid interacting with the one-gluon-exchange interaction. It is suggested that the Hartree-Fock state shows a spontaneous magnetic instability at low densities through the same mechanism as the appearance of ferromagnetism in electron gas. Metastability of the polarised quark liquid is also discussed.

14 pages, 2 postscript figures

References in corpus (2)

• Color Superconductivity and Chiral Symmetry Restoration at Nonzero Baryon Density and Temperature
• ASCA Discovery of an X-ray Pulsar in the Error Box of SGR1900+14

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