3 papers
math.DG2024
Classification of superpotentials for cohomogeneity one Ricci solitons
Qiu Shi Wang
We classify superpotentials for the Hamiltonian system corresponding to the cohomogeneity one gradient Ricci soliton equations. Aside from recovering known examples of superpotenti…
hep-ph2023
Phantom fluid cosmology: Impact of a phantom hidden sector on cosmological observables
James M. Cline, Matteo Puel, Takashi Toma +1
Phantom scalar theories are widely considered in cosmology, but rarely at the quantum level, where they give rise to negative-energy ghost particles. These cause decay of the vacuu…
gr-qc2022
The Dirac equation across the horizons of the 5D Myers-Perry geometry : Separation of variables, radial asymptotic behaviour and Hamiltonian formalism
Qiu Shi Wang
We analytically extend the 5D Myers-Perry metric through the event and Cauchy horizons by defining Eddington-Finkelstein-type coordinates. Then, we use the orthonormal frame formal…