4 papers
Mapping the inhomogeneous Universe with Standard Sirens: Degeneracy between inhomogeneity and modified gravity theories
Marios Kalomenopoulos, Sadegh Khochfar, Jonathan Gair +1
The detection of gravitational waves (GWs) and an accompanying electromagnetic (E/M) counterpart have been suggested as a future probe for cosmology and theories of gravity. In thi…
Cosmological evolution of viable models in the generalized scalar-tensor theory
Shun Arai, Purnendu Karmakar, Atsushi Nishizawa
We investigate the parameter distributions of the viable generalized scalar-tensor theory with conventional dust matter after GW170817 in a model-independent way. We numerically co…
Dynamics of Order Parameters of Non-stoquastic Hamiltonians in the Adaptive Quantum Monte Carlo Method
Shunta Arai, Masayuki Ohzeki, Kazuyuki Tanaka
We derive macroscopically deterministic flow equations with regard to the order parameters of the ferromagnetic -spin model with infinite-range interactions. The -spin model…
Inflationary perturbations with Lifshitz scaling
Shun Arai, Sergey Sibiryakov, Yuko Urakawa
Instead of Lorentz invariance, gravitational degrees of freedom may obey Lifshitz scaling at high energies, as it happens in Hořava's proposal for quantum gravity. We study consequ…