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arXiv 0906.1385gr-qchep-phhep-th
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旋量是否存在标架拖曳?

Do Spinors Frame-Drag?

Andrew Randono

摘要:

我们研究了基本旋量场的内禀自旋对周围时空几何的影响。我们表明,尽管缺乏一个旋转的应力能量源(尽管声称相反)的自旋半费米子的内禀自旋引起的帧拖曳效应类似的轨道角动量,即使在爱因斯坦-希尔伯特引力的扭转被约束为零。这解决了一个悖论,关于恢复牛顿第三定律所需的反作用力在众所周知的自旋轨道相互作用。此外,框架拖曳效应引起了一个{ \it长程}引力介导的自旋-自旋偶极相互作用耦合两个源的{ \it内部}自旋。我们认为,尽管相互作用的弱点,自旋-自旋相互作用将占主导地位,在任何过程中的能量足够高的量子场论效应是不可忽略的普通平方反比牛顿相互作用。

英文摘要:

We investigate the effect of the intrinsic spin of a fundamental spinor field on the surrounding spacetime geometry. We show that despite the lack of a rotating stress-energy source (and despite claims to the contrary) the intrinsic spin of a spin-half fermion gives rise to a frame-dragging effect analogous to that of orbital angular momentum, even in Einstein-Hilbert gravity where torsion is constrained to be zero. This resolves a paradox regarding the counter-force needed to restore Newton's third law in the well known spin-orbit interaction. In addition, the frame-dragging effect gives rise to a {\it long-range} gravitationally mediated spin-spin dipole interaction coupling the {\it internal} spins of two sources. We argue that despite the weakness of the interaction, the spin-spin interaction will dominate over the ordinary inverse square Newtonian interaction in any process of sufficiently high-energy for quantum field theoretical effects to be non-negligible.

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