Double-binary-pulsar test of Chern-Simons modified gravity
Double-binary-pulsar test of Chern-Simons modified gravity
Chern-Simons modified gravity is a string theory and loop-quantum-gravity inspired effective theory that modifies general relativity by adding a parity-violating Pontryagin density to the Einstein-Hilbert action multiplied by a coupling scalar. We strongly constrain nondynamical Chern-Simons modified gravity with a timelike Chern-Simons scalar through observations of the double-binary-pulsar PSR J0737-3039A/B. …