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arXiv 2010.05945gr-qchep-th
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引力场作用下非相对论区域Dirac哈密顿量的几何相位

Geometric phase for Dirac Hamiltonian under gravitational fields in the non-relativistic regime

Tanuman Ghosh, Banibrata Mukhopadhyay

摘要:

我们证明了在非时间依赖的引力场中,狄拉克粒子在非相对论极限中的几何相位的出现。这与最初描述的磁场中的几何相位相似。我们探讨了几何相位的克尔和史瓦西几何,这有显着的天体物理意义。然而,工作可以扩展到任何时空背景,包括时间相关的。在Kerr背景下,即在旋转黑洞周围,几何相位揭示了Aharonov-Bohm效应和Pancharatnam-Berry相位。然而,在史瓦西几何中,也就是在一个不旋转的黑洞周围,只有后者出现。我们希望我们的断言可以在强引力的情况下得到验证,如黑洞周围的时空,和地球周围的弱引力环境。

英文摘要:

We show the appearance of geometric phase in a Dirac particle traversing in non-relativistic limit in a time-independent gravitational field. This turns out to be similar to the one originally described as a geometric phase in magnetic fields. We explore the geometric phase in the Kerr and Schwarzschild geometries, which have significant astrophysical implications. Nevertheless, the work can be extended to any spacetime background including that of time-dependent. In the Kerr background, i.e. around a rotating black hole, geometric phase reveals both the Aharonov-Bohm effect and Pancharatnam-Berry phase. However, in a Schwarzschild geometry, i.e. around a nonrotating black hole, only the latter emerges. We expect that our assertions can be validated in both the strong gravity scenarios, like the spacetime around black holes, and weak gravity environment around Earth.

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