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arXiv 0709.2419hep-th
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带拓扑项的引力Higgs机制

Gravitational Higgs Mechanism with a Topological Term

Ichiro Oda

摘要:

我们研究了最近由t Hooft提出的引力的Higgs机制,当标量场的Polyakov型作用量被加入到原始作用量中时。我们发现,从Polyakov型作用量出发,导出一个由标量场组成的“替代”度量张量是非常自然的。行列式的正性条件也可以很容易地推导出来,只要这一项不改变动力学,并成为一个拓扑数,即包裹数。结果表明,特胡夫特所采用的规范条件只不过是对单位包数扇区的限制。

英文摘要:

We investigate the Higgs mechanism for gravity, which has been recently put forward by 't Hooft, when the Polyakov-type action for scalar fields is added to the original action. We find that from the Polyakov-type action, it is very natural to derive an 'alternative' metric tensor composed of the scalar fields. The positivity condition on the determinant can be also derived easily by requiring that this term does not change the dynamics at all and becomes a topological number, that is, the wrapping number. It turns out that the gauge conditions adopted by 't Hooft are nothing but the restriction on a sector with unit wrapping number.

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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