78 citations · 336 across the 23 of their papers we have counts for
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gr-qc2015★ 6 cited
A unifying framework for ghost-free Lorentz-invariant Lagrangian field theories
Wenliang Li
We propose a framework for Lorentz-invariant Lagrangian field theories where Ostrogradsky's scalar ghosts could be absent. A key ingredient is the generalized Kronecker delta. The…
gr-qc2015★ 9 cited
Novel nonlinear kinetic terms for gravitons
Wenliang Li
A set of novel derivative terms for spin-2 fields are proposed. They are the wedge products of curvature two-forms and vielbeins. In this work, we investigate the properties of nov…