249 citations
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- Waseda UniversityJP21 papers
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4 papers · 2 filters
Cosmological intersecting brane solutions
Masato Minamitsuji, Nobuyoshi Ohta, Kunihito Uzawa
The recent discovery of an explicit dynamical description of p-branes makes it possible to investigate the existence of intersection of such objects. We generalize the solutions de…
Dynamical p-branes with a cosmological constant
Kei-ichi Maeda, Masato Minamitsuji, Nobuyoshi Ohta +1
We present a class of dynamical solutions in a D-dimensional gravitational theory coupled to a dilaton, a form field strength, and a cosmological constant. We find that for any D d…
Notes on Entropy Force in General Spherically Symmetric Spacetimes
Rong-Gen Cai, Li-Ming Cao, Nobuyoshi Ohta
In a recent paper [arXiv:1001.0785], Verlinde has shown that the Newton gravity appears as an entropy force. In this paper we show how gravity appears as entropy force in Einstein'…
Friedmann Equations from Entropic Force
Rong-Gen Cai, Li-Ming Cao, Nobuyoshi Ohta
In this note by use of the holographic principle together with the equipartition law of energy and the Unruh temperature, we derive the Friedmann equations of a Friedmann-Robertson…