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arXiv 1609.09110hep-thphysics.class-ph
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相对论自旋粒子的双局域模型

A Bilocal Model for the Relativistic Spinning Particle

Trevor Rempel, Laurent Freidel

摘要:

在这项工作中,我们表明,一个相对论自旋粒子可以在经典和量子水平被描述为由两个物理成分,这是纠缠和分离的一个固定的距离。这种自旋粒子的双局部模型允许将粒子相互作用自然地描述为每个组分处的局部相互作用。这种形式的相互作用顶点提供了一个长期存在的问题,在世界线形式主义的背景下,旋转物体的相对论相互作用的性质的解决方案。它也可能带来一个动力学解释为什么大质量的基本物体自然是最低的自旋。我们首先分析了一个非相对论系统,其中自旋被建模为两个粒子的纠缠态,纠缠编码成一组约束。结果表明,这些限制可以相对论性的,并得到的描述是同构的大质量相对论性粒子的相空间的限制,量子自旋必须是一个整数的通常的描述。

英文摘要:

In this work we show that a relativistic spinning particle can be described at the classical and the quantum level as being composed of two physical constituents which are entangled and separated by a fixed distance. This bilocal model for spinning particles allows for a natural description of particle interactions as a local interaction at each of the constituents. This form of the interaction vertex provides a resolution to a long standing issue on the nature of relativistic interactions for spinning objects in the context of the worldline formalism. It also potentially brings a dynamical explanation for why massive fundamental objects are naturally of lowest spin. We analyze first a non-relativistic system where spin is modeled as an entangled state of two particles with the entanglement encoded into a set of constraints. It is shown that these constraints can be made relativistic and that the resulting description is isomorphic to the usual description of the phase space of massive relativistic particles with the restriction that the quantum spin has to be an integer.

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