Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1999-11-23
Physics
Nuclear Physics
Nuclear Theory
RevTeX, 12 pages; Talk given by K.G. Klimenko at the International Workshop on Hadron Physics, 10-15 September 1999, Coimbra,
Scientific paper
10.1063/1.1303031
The phase structure of a simple Nambu-Jona-Lasinio model has been investigated at non-zero values of $\mu$ and H, where H is an external magnetic field and $\mu$ is the chemical potential. On this basis magnetic oscillations effects were considered. It was shown that there are standard (periodic) van Alphen-de Haas magnetic oscillations of some thermodynamical quantities, including magnetization, pressure and particle density in the NJL system. Besides, we have found non-standard, i.e. non-periodic, magnetic oscillations, since the frequency of oscillations is a H-dependent quantity. Finally, there arises an oscillating behaviour not only for thermodynamical quantities, but also for a dynamical quantity like the quark mass. The possibility for magnetic oscillations of some physical quantities inside neutron stars is discussed.
Ebert Dietmar
Klimenko K. G.
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