59 citations · 156 across the 12 of their papers we have counts for
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hep-th2025★ 2 cited
Scalar parity-odd trispectrum from gravitational Chern-Simons interaction vertices
Giorgio Orlando, Shingo Akama, Chunshan Lin
In this paper, we explore parity violation in a scalar trispectrum from a dynamical Chern-Simons gravity theory. So far, a graviton-mediated diagram with two vertexes being of gene…
hep-th2017★ 59 cited
Generalized multi-Galileons, covariantized new terms, and the no-go theorem for non-singular cosmologies
Shingo Akama, Tsutomu Kobayashi
It has been pointed out that non-singular cosmological solutions in second-order scalar-tensor theories generically suffer from gradient instabilities. We extend this no-go result…