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Boundary contributions in the causal set action
Classical and Quantum Gravity ( IF 3.5 ) Pub Date : 2020-10-20 , DOI: 10.1088/1361-6382/abc2fd
Fay Dowker

Evidence is provided for a conjecture that, in the continuum limit, the mean of the causal set action of a causal set sprinkled into a globally hyperbolic Lorentzian spacetime, M, of finite volume equals the Einstein Hilbert action of M plus the volume of the co-dimension 2 intersection of the future boundary with the past boundary. We give the heuristic argument for this conjecture and analyse some examples in 2 dimensions and one example in 4 dimensions.

中文翻译:

因果集动作中的边界贡献

为猜想提供了证据,即在连续极限中,散布到有限体积的全局双曲洛伦兹时空 M 中的因果集的因果集作用的平均值等于 M 的爱因斯坦希尔伯特作用加上 co 的体积- 未来边界与过去边界的维度 2 交集。我们对这个猜想给出了启发式论证,并分析了一些二维例子和一个四维例子。
更新日期:2020-10-20
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