Vector interactions enlarge anisotropic surface tension of quark matter in magnetic fields, cause transverse tension to rise with B in strong fields, require moderate B for bubble formation, and slightly reduce stability.
Self-bound quark matter in the NJL model revisited: from schematic droplets to domain-wall solitons
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abstract
The existence and the properties of self-bound quark matter in the NJL model at zero temperature are investigated in mean-field approximation, focusing on inhomogeneous structures with one-dimensional spatial modulations. It is found that the most stable homogeneous solutions which have previously been interpreted as schematic quark droplets are unstable against formation of a one-dimensional soliton-antisoliton lattice. The solitons repel each other, so that the minimal energy per quark is realized in the single-soliton limit. The properties of the solitons and their interactions are discussed in detail, and the effect of vector interactions is estimated. The results may be relevant for the dynamics of expanding quark matter.
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Anisotropic surface tension and stability of quark matter modified by the vector interaction
Vector interactions enlarge anisotropic surface tension of quark matter in magnetic fields, cause transverse tension to rise with B in strong fields, require moderate B for bubble formation, and slightly reduce stability.