大规模重力双重性Redux
Massive Gravity Acausality Redux
摘要：
大质量引力（mGR）是一个5（=2s+1）自由度，有限范围的GR扩展。然而，在其他问题中，它是困扰超光速传播，首先发现通过二阶冲击分析。一阶mGR激波结构也被研究过，但在这种背景下超光速传播的存在是开放的。我们在这里提出了这些方法的一致性，通过明确的（一阶）特征矩阵计算，这证实了mGR的超光速传播以及非因果性。
英文摘要：
Massive gravity (mGR) is a 5(=2s+1) degree of freedom, finite range extension of GR. However, amongst other problems, it is plagued by superluminal propagation, first uncovered via a second order shock analysis. First order mGR shock structures have also been studied, but the existence of superluminal propagation in that context was left open. We present here a concordance of these methods, by an explicit (first order) characteristic matrix computation, which confirms mGR's superluminal propagation as well as acausality.
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