中子物质的一种可能相变

建议高密物质中子化后出现夸克集团相，这是一种带色的中子．分析了相应温度和密度．讨论了新相的自族长程序和类铁磁的畴状结构．

A Model on the Phase-Transition of Neutron Matter

A quark cluster phase after the neutronization of clusterdense matter is suggested. The new phase is defined by a quark cluster(udd)with non-singlet color and it is essentially a colored neutron.The phase transition from neutron to quark cluster phase is analysedin mean-field-approximation. It is shown that the order parameter undergoes an abrupt change at some temperature Tc for given density ofthe matter. The dependence of the transition temperature on the density of quark matter and then the phase diagram are deduced. Themain factor to cause the phase transition is nonvanishing color magnetic moment of the quark cluster and the interaction of the moments between adjacent clusters. An important property of the new phase isthe spin-long-range-order which would lead to a ferromagnetic-likedomain structure in the superdense matter. The latter may give a possible explanation on the origin of strong magnetic field in neutronstar.