Exploding Bose-Einstein condensates and collapsing neutron stars driven by critical magnetic fields

The problem of a condensate of a relativistic neutral vector boson gas constituted of particles bearing a magnetic moment is discussed. Such a vector boson system is expected to be formed either by parallel spin-pairing of neutrons in a sufficiently strong magnetic field, or by neutral atoms under specific conditions of magnetic field strength and density. A strong self-magnetization arises due to a Bose-Einstein-like condensation. Then the system, which may resemble the superfluid said to exist in the core of neutron stars, becomes more unstable under transverse collapse than the ordinary fermion gas. In the nonrelativistic limit of laboratory conditions, an analogy with the behavior of exploding Bose-Einstein condensates for critical values of magnetic field strength and particle density; reported by several authors, is briefly discussed.

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