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arXiv 1702.04096gr-qcphysics.class-ph
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引力场中带电粒子的显式对称破缺辐射

Radiation from charged particles due to explicit symmetry breaking in a gravitational field

Fabrizio Tamburini, Mariafelicia De Laurentis, Ignazio Licata

摘要:

在引力场中自由下落的辐射带电粒子的悖论是一个著名的迷人的概念挑战,涉及经典电动力学和广义相对论。我们讨论这个悖论考虑辐射的发射作为一个明确的空间/时间对称性破缺的结果,涉及电场从外部观察者看到的粒子的轨迹内。当带电粒子的相对运动不遵循由问题的显式拉格朗日公式所决定的运动的测地线,从而不遵循时空度规时,就会发生这种情况。这个问题等价于像天线这样的辐射系统的空间结构中的对称性破坏:当电流在封闭区域内的某个时刻不守恒时,就会发生辐射[1]。只有当空间和时间中的电场存在明显的对称性破缺时,电荷系统的辐射才是可能的。

英文摘要:

The paradox of a free falling radiating charged particle in a gravitational field, is a well-known fascinating conceptual challenge that involves classical electrodynamics and general relativity. We discuss this paradox considering the emission of radiation as a consequence of an explicit space/time symmetry breaking involving the electric field within the trajectory of the particle seen from an external observer. This occurs in certain particular cases when the relative motion of the charged particle does not follow a geodesic of the motion dictated by the explicit Lagrangian formulation of the problem and thus from the metric of spacetime. The problem is equivalent to the breaking of symmetry within the spatial configuration of a radiating system like an antenna: when the current is not conserved at a certain instant of time within a closed region then emission of radiation occurs [1]. Radiation from a system of charges is possible only when there is explicit breaking of symmetry in the electric field in space and time.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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