Nonextensive thermostatistics can yield apparent magnetism (RAPID COMMUNICATION)

PORTESI, M.; PLASTINO, A.L.; TSALLIS, C.

PHYSICAL REVIEW E - STATISTICAL PHYSICS, PLASMAS, FLUIDS AND RELATED INTERDISCIPLINARY TOPICS

The American Physical Society

Año: 1995 vol. 52 p. 3317 - 3320

1063-651X

Bacry [Phys. Lett. B 317, 523 (1993)] showed that, on the basis of a deformed Poincaré group, special relativity yields a nonadditive energy for large systems, i.e., a total energy (of the Universe) which would not be proportional to the number of particles. He consistently argued that this effect could explain (part of) the so-called dark matter. By considering noninteracting spins at thermal equilibrium in the presence of an external magnetic field, we show here that the recently introduced nonextensive (nonadditive) thermostatistics could account for a theoretically possible ‘‘dark magnetism’’ (the apparent number of spins being smaller or larger than the actual one).