Thermodynamic properties of neutral Dirac particles in the presence of an electromagnetic field
| Autor: | R. R. S. Oliveira, A. A. Araújo Filho |
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| Rok vydání: | 2020 |
| Předmět: |
Canonical ensemble
Electromagnetic field Physics 010308 nuclear & particles physics Complex system General Physics and Astronomy 01 natural sciences Heat capacity Magnetic field Entropy (classical thermodynamics) symbols.namesake Quantum electrodynamics Helmholtz free energy Electric field 0103 physical sciences symbols 010306 general physics |
| Zdroj: | The European Physical Journal Plus. 135 |
| ISSN: | 2190-5444 |
| DOI: | 10.1140/epjp/s13360-020-00146-9 |
| Popis: | In this paper, we investigate the thermodynamic properties of a set of neutral Dirac particles in the presence of an electromagnetic field in contact with a heat bath for the relativistic and nonrelativistic cases. In order to perform the calculations, the high temperatures regime is considered and the Euler–MacLaurin formula is taking into account. Next, we explicitly determine the behavior of the main thermodynamic functions of the canonical ensemble: the Helmholtz free energy, the mean energy, the entropy, and the heat capacity. As a result, we verify that the mean energy and the heat capacity for the relativistic case are twice the values of the nonrelativistic case, thus, satisfying the so-called Dulong–Petit law. In addition, we also verify that the Helmholtz free energy increases and the entropy decreases as functions of the electric field. Finally, we note that there exists no influence on the thermodynamic functions due to the magnetic field. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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