Comments on "Casimir Effect in the Kerr spacetime with Quintessence"

Abstract

This comment is devoted to the recalculation of the Casimir energy of a massless scalar field in the Kerr black hole surrounded by quintessence derived in [B. Toshmatov, Z. Stuchlík and B. Ahmedov, Eur. Phys. J. Plus {\bf 132}, 98 (2017)] and its comparison with the results recently obtained in [V. B. Bezerra, M. S. Cunha, L. F. F. Freitas and C. R. Muniz, Mod. Phys. Lett. A {\bf 32}, 1750005 (2017)] in the spacetime [S. G. Ghosh, Eur. Phys. J. C {\bf 76}, 222 (2016)]. We have shown that in the more realistic spacetime which does not have the failures illustrated here, the Casimir energy is significantly bigger than that derived in [V. B. Bezerra, M. S. Cunha, L. F. F. Freitas and C. R. Muniz, Mod. Phys. Lett. A {\bf 32}, 1750005 (2017)], and the difference becomes crucial especially in the regions of near horizons of the spacetime.

arXiv comment6 pages, 2 figures

References in corpus (6)

• Quintessence and black holes
• Rotating regular black holes
• Generating rotating regular black hole solutions without complexification
• Rotating Regular Black Hole Solution
• Rotating black hole and quintessence
• Casimir Effect in the Kerr Spacetime with Quintessence

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• Rotating normal and phantom Einstein--Maxwell--dilaton black holes: Geodesic analysis
• Epicyclic oscillations of charged particles in stationary solutions immersed in a magnetic field with application to the Kerr--Newman black hole