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arXiv 1701.01545gr-qc
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连续体动力学与Mathisson-Papapetrou-Dixon方程

Continuous body dynamics and the Mathisson-Papapetrou-Dixon equations

S. P. Loomis, J. David Brown

摘要:

我们表明,一个有效的粒子拉格朗日产生Mathisson-Papapetrou-Dixon(MPD)方程。有效粒子的自旋是在没有任何固定的物体坐标系或角速度变量的情况下定义的。然后,我们证明了一个连续的身体,由世界线的全等定义,并描述了一个一般的行动,可以重写为有效粒子。我们分析了物体的规范自由度,并表明自然的质心条件与自旋补充条件有关。

英文摘要:

We show that an effective particle Lagrangian yields the Mathisson-Papapetrou-Dixon (MPD) equations. The spin of the effective particle is defined without any reference to a fixed body frame or angular velocity variable. We then demonstrate that a continuous body, defined by a congruence of world lines and described by a general action, can be rewritten as an effective particle. We analyze the gauge freedom of the body and show that a natural center of mass condition is related to a spin supplementary condition.

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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