1994/07/22 by Per Elmfors, Per Liljenberg, David Persson +1 · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #High-pressure geophysics and materials #Pulsars and Gravitational Waves Research #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.51.5885
published as Phys.Rev. D51 (1995) 5885-5888 · 8 pages. Göteborg ITP 94-13
arxiv created 1994/07/22 · openalex publication_date 1995/05/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The magnetized relativistic Fermi (spin-1/2) and Bose (spin-0) gases are studied at finite temperature and density. At high enough magnetic fields the renormalized, paramagnetic vacuum (T=\ensuremathμ=0) contribution starts to dominate the magnetization in both cases. This happens when the thermal magnetization saturates in the Fermi case, and when the thermal magnetization changes from a diamagnetic to a paramagnetic behavior in the Bose case. For fermions at high temperatures, the nonlinear vacuum part of the effective action is completely canceled by terms in the thermal effective action, so that the effective action becomes quadratic in the field. In the Bose case such a cancellation does not occur. Furthermore, we find for the Bose gas that the effective coupling constant for a weak nonzero external magnetic field is a decreasing function of the temperature.