109 citations · 613 across the 27 of their papers we have counts for
5 papers · 1 filter
Cuscuton gravity as a classically stable limiting curvature theory
Jerome Quintin, Daisuke Yoshida
Finding effective theories of modified gravity that can resolve cosmological singularities and avoid other physical pathologies such as ghost and gradient instabilities has turned…
Ghost-free resummation of gravitational interactions of a 2-form gauge field
Kazufumi Takahashi, Daisuke Yoshida
We find that the recently-proposed ghost-free interaction of a 2-form gauge field in four dimensions, which contains derivative couplings in a nonperturbative manner, can be regard…
Birth of de Sitter Universe from time crystal
Daisuke Yoshida, Jiro Soda
We show that a simple sub-class of Horndeski theory can describe a time crystal Universe. The time crystal Universe can be regarded as a baby Universe nucleated from a flat space,…
2-form gauge theory dual to scalar-tensor theory
Daisuke Yoshida
We generalize the electromagnetic duality between a massless, canonical scalar field and a 2-form gauge field in 4-dimensional spacetime to scalar-tensor theories. We derive the ac…
Global Spacetime Structure of Compactified Inflationary Universe
Tokiro Numasawa, Daisuke Yoshida
We investigate the global spacetime structure of torus de Sitter universe, which is exact de Sitter space with torus identification based on the flat chart. We show that past incom…