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16 papers · 1 filter
The Sachs-Wolfe Effect: Gauge Independence and a General Expression
J. Hwang, H. Noh
In this paper we address two points concerning the Sachs-Wolfe effect: (i) the gauge independence of the observable temperature anisotropy, and (ii) a gauge-invariant expression of…
Polarization Structures in the Thomson-Scattered Emission Lines in Active Galactic Nuclei
Hee-Won Lee
A line photon incident in an electron-scattering medium is transferred in a diffusive way both in real space and in frequency space, and the mean number of scatterings changes as t…
Cosmological perturbations in a gravity with quadratic order curvature couplings
H. Noh, J. Hwang
We present a set of equations describing the evolution of the scalar-type cosmological perturbation in a gravity with general quadratic order curvature coupling terms. Equations ar…
COBE-DMR constraints on a inflation model with non-minimal scalar field
J. Hwang, H. Noh
We derive the power spectra of the scalar- and tensor-type structures generated in a chaotic-type inflation model based on non-minimally coupled scalar field with a self interactio…
Fractional Quantization and Fractional Quantum Hall Effect
Hyeong Rag Lee
A fractional quantization in a two dimensional space is proposed. The angular momenta of the two dimensional electrons are quantized in fractional numbers by the boundary condition…
N=8 SCFT and M Theory on AdS_4 x RP^7
Changhyun Ahn, Hoil Kim, Bum-Hoon Lee +1
We study M theory on $AdS_4 \times \RP^7$ corresponding to 3 dimensional superconformal field theory which is the strong coupling limit of 3 dimensional super Yang-Mil…