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arXiv 1603.06341hep-th
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作为引力$σ$模型的非线性质量引力

Non linear massive gravity as a gravitational $σ$-model

Ivan Arraut, Kaddour Chelabi

摘要:

我们显示了直接的类比之间的幽灵免费的非线性制定的大规模的重力和标准的$σ$模型,以及在文献中理解。这个问题解释了为什么在具有两个自由参数$α$和$β$的非线性有质量引力公式中存在两个球对称情形的非平凡解族。通常,情况下$β<α^2$具有单一物理真空状态。另一方面,情况$β=α^2$包含自然真空简并。这与标量场的$σ$模型完全类似,其中根据理论参数的值,真空可以是单一的或简并的。

英文摘要:

We show the direct analogy between the ghost-free non-linear formulation of massive gravity and the standard $σ$-models well understood in the literature. This issue explains why there are two non-trivial family of solutions for the spherically symmetric case inside the non-linear massive gravity formulations with two free-parameters $α$ and $β$. In general, the case $β<α^2$ has a single physical vacuum state. On the other hand, the case $β=α^2$ contains a natural vacuum degeneracy. This is in perfect analogy with the $σ$-model for scalar fields where depending on the values taken by the parameters of the theory the vacuum can be single or degenerate.

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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