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Quantum entropy of Dirac field in toroidal black hole
Affiliation:1. Laboratory Physico-Chemistry of Advanced Materials, University of Djillali Liabes, BP 89, Sidi Bel Abbes 22000, Algeria;2. Magnetic Laboratory, Djillali Liabes University, Sidi Bel Abbes 22000, Algeria;3. Djillali Liabes University, Faculty of Exact Sciences, Department of Physics, PO Box 089, Sidi Bel Abbes 22000, Algeria;4. Institute of Nano Electronic Engineering, University Malaysia Perlis, 01000 Kangar, Perlis, Malaysia;5. Modeling and Simulation Materials Sciences Laboratory, Sidi-Bel-Abbès University, Sidi Bel Abbes 22000, Algeria;6. Materials Science Laboratory, School of Physics, Vigyan Bhavan, Devi Ahilya University, Khandwa Road Campus, Indore 452001, India;7. Djillali Liabes University, Faculty of Letters, Languages and Arts, Department of Foreign Languages, English Section, Sidi Bel Abbes 22000, Algeria;1. Ångström Tribomaterials Group, Uppsala University, Box 534, 751 21 Uppsala, Sweden;2. ABB Corporate Research, Västerås, Sweden;1. University of Hyogo, Shosha 2167, Himeji, Japan;2. University of Tokyo, Hongo 6-1-7, Bunkyo-ku, Japan
Abstract:The quantum entropy of Dirac field in toroidal black hole is considered and the effects of the spins of the Dirac particles on the entropy are investigated using brick-wall model. It is shown that the quantum entropy has both linearly and logarithmically divergent terms and it has the different structure from that of the black hole. It is also shown that the contribution of the subleading logarithmic term which relates to the spins of the Dirac particles are always positive.
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