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gr-qc2026
Parity-violating spatially covariant gravity at total derivative order
Jin-Jian Song, Xian Gao
We extend the polynomial construction of parity-violating spatially covariant gravity (SCG) to total derivative order , where counts the tota…
gr-qc2026
Spatially covariant gravity with two degrees of freedom: A perturbative analysis up to cubic order
Yang Yu, Yu-Min Hu, Xian Gao
There has been considerable interest in constructing modified gravity theories that propagate only two degrees of freedom (DOFs), corresponding to the tensorial gravitational waves…