João da Providência

TL;DR: In this paper, exact solutions for the Lipkin-Meshkov-Glick (LMG) model Hamiltonian are obtained by solving the Bethe ansatz equation (BAE) which is derived from the variation equation based on Bethe's ansatz.

TL;DR: A possibility of spontaneous magnetization in high density symmetric quark matter is investigated using the NJL type effective model of QCD by means of an effective potential with respect to an auxiliary field as discussed by the authors.

TL;DR: In this article, the authors investigated the occurrence of a ferromagnetic phase transition in high density hadronic matter (e.g., in the interior of a neutron star) induced by a four-fermion interaction analogous to the one which is responsible for chiral symmetry breaking in the Nambu-Jona-Lasinio model, to which it is related through a Fierz transformation.

TL;DR: Tsue et al. as mentioned in this paper presented a spin polarization versus color-flavor locking in high-density quark matter with high-dimensional quark atoms. But they did not consider the effect of the color of quark particles.

TL;DR: In this paper, the magnetization of a high density relativistic fluid of elementary particles is studied and the energy of the system is found by summing up contributions from all particles in the particle fluid.