Curvature in spinfoams

Curvature in spinfoams
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纺丝泡沫的曲率

DOI:
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
C. Perini
C. Perini
中科院分区:
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作者:
Elena Magliaro;C. Perini

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我们考虑自旋泡沫量子引力。我们在一个简单的例子中展示了振幅投影在一个非平凡的(弯曲的)经典几何上。这表明,至少对于没有气泡的自旋泡沫和边界自旋的大值来说,振幅采用Regge度量上的路径积分的形式,从而在经典极限下强制执行离散爱因斯坦方程。结果主要依赖于对截断为固定 2 复数的振幅半经典极限的新解释。
We consider spinfoam quantum gravity. We show in a simple case that the amplitude projects over a nontrivial (curved) classical geometry. This suggests that, at least for spinfoams without bubbles and for large values of the boundary spins, the amplitude takes the form of a path integral over Regge metrics, thus enforcing discrete Einstein equations in the classical limit. The result relies crucially on a new interpretation of the semiclassical limit for the amplitudes truncated to a fixed 2-complex.
DOI: 10.1088/0264-9381/27/16/165009
发表时间: 2009-07
影响因子: 3.5
作者:
J. Barrett;R. J. Dowdall;W. Fairbairn;F. Hellmann;R. Pereira
通讯作者: J. Barrett;R. J. Dowdall;W. Fairbairn;F. Hellmann;R. Pereira