Causality Constrains Higher Curvature Corrections to Gravity

نویسندگان

  • A. Gruzinov
  • M. Kleban
چکیده

We show that causality constrains the sign of quartic Riemann corrections to the Einstein-Hilbert action. Our constraint constitutes a restriction on candidate theories of quantum gravity.

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تاریخ انتشار 2006