The True radiation gauge for gravity
Jun, 2010
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Abstract: (arXiv)
Corresponding to the similarity between the Lorentz gauge in electrodynamics and in gravity, we show that the counterpart of the radiation gauge is , in stead of other forms as discussed before. Particularly: 1) at least for a weak field, fixes the gauge completely and picks out exactly the two physical components of the gravitational field/ 2) like , the non-dynamical components are solved instantaneously/ 3) gravitational radiation is generated by the 'transverse' part of the energy-momentum tensor, similar to the transverse current . This true' radiation gauge is especially pertinent for studying gravitational energy, such as the energy flow in gravitational radiation. It agrees with the transverse-traceless (TT) gauge for a pure wave, and reveals remarkably how the TT gauge can be adapted in the presence of source.- 11.15.-q
- 04.20.Cv
- gravitation: energy
- gravitation: gauge field theory
- energy flow
- weak field
- Lorentz gauge
- transformation: gauge
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