2012

Acausality of Massive Gravity

Deser, S., Waldron, A.

Understand

We show, by analyzing its characteristics, that the ghost-free, 5 degree of freedom, Wess--Zumino massive gravity model admits superluminal shock wave solutions and thus is acausal.

  • Ironically, this pathology arises from the very constraint that removes the (sixth) Boulware-Deser ghost mode.

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