X iv : n uc l - th / 0 21 10 45 v 1 1 4 N ov 2 00 2 Novel Phases at High Density and their Roles in the Structure and Evolution of Neutron Stars ∗
نویسنده
چکیده
Despite decades of study, the question What is the ground state of dense baryonic matter? remains in the realm of theoretical speculation. Advances in our understanding of strongly interacting many-particle systems and QCD suggests numerous candidate states which have competitive free energy. Conventional many-body techniques, including those of lattice gauge theory and non-relativistic variational and Greens function methods, have yet to make definitive statements regarding the phase structure of matter at densities of relevance to neutron stars. In these lectures we discuss a few novel phases of matter and highlight some of their astrophysical consequences. They include (i) baryonic matter with hyperons, (ii) kaon condensation and (iii) normal and superconducting quark matter. The choice of topics presented is a synthesis of collaborative research the author has undertaken in the past four years. In this sense, the scope of the article is limited and no attempt is made to present a comprehensive review. For a detailed review of assorted topics relating to the interior of neutron stars see Ref. [1].
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