Sum over topologies and double-scaling limit in 2D Lorentzian quantum gravity

被引：9
|
作者：
Loll, R [1 ]
Westra, W [1 ]
机构：
[1] Univ Utrecht, Inst Theoret Phys, NL-3584 CE Utrecht, Netherlands
来源：
CLASSICAL AND QUANTUM GRAVITY | 2006年 / 23卷 / 02期
关键词：
D O I：
10.1088/0264-9381/23/2/011
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We construct a combined non-perturbative path integral over geometries and topologies for two-dimensional Lorentzian quantum gravity. The Lorentzian structure is used in an essential way to exclude geometries with unacceptably large causality violations. The remaining sum can be performed analytically and possesses a unique and well-defined double-scaling limit, a property which has eluded similar models of Euclidean quantum gravity in the past.
引用
收藏
页码：465 / 471
页数：7
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