对EPRL-FK自旋泡沫引力子的辐射修正
Radiative corrections to the EPRL-FK spinfoam graviton
摘要:
我研究的修正所产生的插入一个“瓜”图的大部分用于引力子传播的一阶spinfoam。我发现,这些修正是非常重要的,特别是,他们关注的那些条款消失在Bojowald-Bianchi-Magliaro-Perini限制消失Barbero-Immirzi参数在固定区域。这一事实是第一次实现经常引用的想法,自旋泡沫振幅接收下的基础两个复杂的细化高阶修正。
英文摘要:
I study the corrections engendered by the insertion of a "melon" graph in the bulk of the first-order spinfoam used for the graviton propagator. I find that these corrections are highly non-trivial and, in particular, that they concern those terms which disappear in the Bojowald-Bianchi-Magliaro-Perini limit of vanishing Barbero-Immirzi parameter at fixed area. This fact is the first realization of the often cited idea that the spinfoam amplitude receives higher order corrections under the refinement of the underlying two-complex.
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