# New post-Newtonian parameter to test Chern-Simons gravity.

@article{Alexander2007NewPP,
title={New post-Newtonian parameter to test Chern-Simons gravity.},
author={Stephon H. S. Alexander and Nicol{\'a}s Yunes},
journal={Physical review letters},
year={2007},
volume={99 24},
pages={
241101
}
}
• Published 28 March 2007
• Geology, Physics
• Physical review letters
We study Chern-Simons (CS) gravity in the parametrized post-Newtonian (PPN) framework through a weak-field solution of the modified field equations. We find that CS gravity possesses the same PPN parameters as general relativity, except for the inclusion of a new term, proportional to the CS coupling and the curl of the PPN vector potential. This new term leads to a modification of frame dragging and gyroscopic precession and we provide an estimate of its size. This correction might be used in…

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## References

SHOWING 1-10 OF 38 REFERENCES

### Parametrized post-Newtonian expansion of Chern-Simons gravity

• Physics
• 2007
We investigate the weak-field, post-Newtonian (PN) expansion to the solution of the field equations in Chern-Simons (CS) gravity with a perfect fluid source. In particular, we study the mapping of

### Chern-Simons modification of general relativity

• Physics
• 2003
General relativity is extended by promoting the three-dimensional gravitational Chern-Simons term to four dimensions. This entails choosing an embedding coordinate v_\mu -- an external quantity,

### Papapetrou energy-momentum tensor for Chern-Simons modified gravity

• Physics
• 2007
We construct a conserved, symmetric energy-momentum (pseudo-)tensor for Chern-Simons modified gravity, thus demonstrating that the theory is Lorentz invariant. The tensor is discussed in relation to

### Birefringent Gravitational Waves and the Consistency Check of Inflation

• Physics
• 2005
In this work we show that the gravitational Chern-Simons term, aside from being a key ingredient in inflationary baryogenesis, modifies super-horizon gravitational waves produced during inflation. We

### The {CP} Problem in Quantum Gravity

• Physics
• 1989
It has recently been shown that one can reformulate general relativity in such a way that the canonical variables of the theory resemble those of Yang-Mills theory and the freedom in performing

### An Alternative to compactification

• Physics
• 1999
Conventional wisdom states that Newton's force law implies only four noncompact dimensions. We demonstrate that this is not necessarily true in the presence of a nonfactorizable background geometry.

### Testing alternative theories of gravity using LISA

• Physics
• 2004
We investigate the possible bounds which could be placed on alternative theories of gravity using gravitational wave detection from inspiralling compact binaries with the proposed LISA space

### Estimating spinning binary parameters and testing alternative theories of gravity with LISA

• Physics
• 2005
We investigate the effect of spin-orbit and spin-spin couplings on the estimation of parameters for inspiralling compact binaries of massive black holes, and for neutron stars inspiralling into

### Theory and Experiment in Gravitational Physics

New technological advances have made it feasible to conduct measurements with precision levels which are suitable for experimental tests of the theory of general relativity. This book has been

### Leptogenesis from gravity waves in models of inflation.

• Physics
Physical review letters
• 2006
We present a new mechanism for creating the observed cosmic matter-antimatter asymmetry which satisfies all three Sakharov conditions from one common thread, gravitational waves. We generate lepton