Physical decomposition of the gauge and gravitational fields

Understand

Physical decomposition of the non-Abelian gauge field has recently solved the two-decade-lasting problem of a meaningful gluon spin.

• Here we extend this approach to gravity and attack the century-lasting problem of a meaningful gravitational energy.
• The metric is unambiguously separated into a pure geometric term which contributes null curvature tensor, and a physical term which represents the true gravitational effect and always vanishes in a flat space-time.
• By this decomposition the conventional pseudo-tensors of the gravitational stress-energy are easily rescued to produce definite physical result.