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6 papers · 2 filters
Cosmological Perturbation in f(T) Gravity Revisited
Keisuke Izumi, Yen Chin Ong
We perform detailed investigation of cosmological perturbations in f(T) theory of gravity coupled with scalar field. Our work emphasizes on the way to gauge fix the theory and we e…
Vorticity, Gyroscopic precession, and Spin-Curvature Force
Wei Chieh Liang, Si Chen Lee
In investigating the relation between vorticity and gyroscopic precession, we calculate the vorticity vector in Godel, Kerr, Lewis, Schwarzschild, Minkowski metric and find out the…
Semi-realistic Bouncing Domain Wall Cosmology
Debaprasad Maity
In this paper we constructed a semi-realistic cosmological model in a dynamic domain wall framework. Our universe is considered to be a (3+1) dimensional dynamic domain wall in a h…
Apparent versus true value of the cosmological constant
Antonio Enea Romano, Pisin chen
Supernovae observations strongly support the presence of a cosmological constant, but its value, which we will call apparent, is normally determined assuming that the universe can…
Scalar perturbations from brane-world inflation with curvature effects
Mariam Bouhmadi-Lopez, Pisin Chen, Yen-Wei Liu
We consider a generalization of the Randall-Sundrum single brane-world scenario (RS2). More precisely, the generalization is described through curvature corrections, corresponding…
Note on Hawking-Unruh effects in graphene
Pisin Chen, H. C. Rosu
Beltrami-shaped graphene sheets have been recently proposed as analogs of curved spacetimes with Hawking-Unruh effects detected through typical condensed matter measurements involv…