带电Taub-NUT黑洞中混沌界的违反

IF 1.1 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

Canadian Journal of Physics Pub Date : 2023-10-17 DOI:10.1139/cjp-2023-0082

Jian Tang

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引用次数: 0

摘要

本文研究了非极和极荷电Taub-NUT黑洞周围带电粒子的角动量对Lyapunov指数的影响，并找到了违反混沌界的空间区域。指数由有效势决定。当粒子的电荷固定时，随着角动量的增加，圆形轨道逐渐远离事件视界。我们发现，当角动量大于某一值时，在距离视界一定距离处，边界总是被打破的。特别是当黑洞的电荷足够小时，李亚普诺夫指数的违逆总是存在于粒子角动量的任何值。

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Violation of the chaos bound in charged Taub–NUT black holes

In this paper, we investigate the influence of the angular momentum of the charged particle around non-extremal and extremal charged Taub–NUT black holes on Lyapunov exponent, and find spatial regions where chaos bound is violated. The exponent is determined by the effective potential. When the particle’s charge is fixed, circular orbits gradually move away from the event horizons with the angular momentum’s increases. We find that the bound is always violated at a certain distance from the horizons when the angular momentum is greater than a certain value. Especially when the black holes’ charges are small enough, the Lyapunov exponent’s violation always exists for any value of the particle’s angular momentum.

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来源期刊

Canadian Journal of Physics 物理-物理：综合

CiteScore

2.30

自引率

8.30%

发文量

审稿时长

1.7 months

期刊介绍： The Canadian Journal of Physics publishes research articles, rapid communications, and review articles that report significant advances in research in physics, including atomic and molecular physics; condensed matter; elementary particles and fields; nuclear physics; gases, fluid dynamics, and plasmas; electromagnetism and optics; mathematical physics; interdisciplinary, classical, and applied physics; relativity and cosmology; physics education research; statistical mechanics and thermodynamics; quantum physics and quantum computing; gravitation and string theory; biophysics; aeronomy and space physics; and astrophysics.