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An Approach toward the Laboratory Search for the Scalar Field as a Candidate of Dark Energy

Yasunori Fujii and Kensuke Homma.

in Progress of Theoretical Physics

September 2011; p ublished online September 2011 .

Journal Article. Subjects: Particles and Fields; Relativity and Gravitation. 0 words.

The observed accelerating universe indicates the presence of Dark Energy which is probably interpreted in terms of an extremely light gravitational scalar field. We suggest a way to probe...

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Black Holes in the Dilatonic Einstein-Gauss-Bonnet Theory in Various Dimensions. II

Zong-Kuan Guo, Nobuyoshi Ohta and Takashi Torii.

in Progress of Theoretical Physics

February 2009; p ublished online February 2009 .

Journal Article. Subjects: Cosmology; Relativity and Gravitation; Particles and Fields. 0 words.

We study asymptotically AdS topological black hole solutions with k = 0 (plane symmetric) in the Einstein gravity with Gauss-Bonnet term, the dilaton and a “cosmological constant” in...

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Black Holes in the Dilatonic Einstein-Gauss-Bonnet Theory in Various Dimensions. IV

Nobuyoshi Ohta and Takashi Torii.

in Progress of Theoretical Physics

December 2009; p ublished online December 2009 .

Journal Article. Subjects: Cosmology; Relativity and Gravitation; Particles and Fields. 0 words.

We study black hole solutions in the Einstein gravity with Gauss-Bonnet term, the dilaton and a positive “cosmological constant” in various dimensions. Physically meaningful black holes...

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Calculation of radiation reaction effect on orbital parameters in Kerr spacetime

Norichika Sago and Ryuichi Fujita.

in Progress of Theoretical and Experimental Physics

July 2015; p ublished online July 2015 .

Journal Article. Subjects: Astronomy and Astrophysics; Relativity and Gravitation. 15200 words.

We calculate the secular changes of the orbital parameters of a point particle orbiting a Kerr black hole, due to the gravitational radiation reaction. For this purpose, we use the...

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Catastrophic Instability of Small Lovelock Black Holes

Tomohiro Takahashi and Jiro Soda.

in Progress of Theoretical Physics

October 2010; p ublished online October 2010 .

Journal Article. Subjects: Relativity and Gravitation; Particles and Fields. 0 words.

We study the stability of static black holes in Lovelock theory which is a natural higher dimensional generalization of Einstein theory. We show that Lovelock black holes are stable under...

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Covariant approach to the no-ghost theorem in massive gravity

Taichiro Kugo and Nobuyoshi Ohta.

in Progress of Theoretical and Experimental Physics

P ublished online April 2014 .

Journal Article. Subjects: Relativity and Gravitation; Particles and Fields. 8959 words.

We discuss the no-ghost theorem in massive gravity in a covariant manner. Using the Becchi-Rouet-Stora-Tyutin (BRST) formalism and Stückelberg fields, we first clarify how the...

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de Sitter Thermodynamics in the Canonical Ensemble

Hiromi Saida.

in Progress of Theoretical Physics

November 2009; p ublished online November 2009 .

Journal Article. Subjects: Cosmology; Relativity and Gravitation. 0 words.

The existing thermodynamics of the cosmological horizon in de Sitter spacetime is established in the micro-canonical ensemble, while the thermodynamics of black hole horizons is established...

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DECIGO/BBO as a Probe to Constrain Alternative Theories of Gravity

Kent Yagi and Takahiro Tanaka.

in Progress of Theoretical Physics

June 2010; p ublished online June 2010 .

Journal Article. Subjects: Astronomy and Astrophysics; Relativity and Gravitation. 0 words.

We calculate how strongly one can constrain the alternative theories of gravity with deci-Hz gravitational wave interferometers such as DECIGO and BBO. Here we discuss Brans-Dicke theory...

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Distinguishing between inflationary models from cosmic microwave background

Shinji Tsujikawa.

in Progress of Theoretical and Experimental Physics

P ublished online June 2014 .

Journal Article. Subjects: Cosmology; Relativity and Gravitation. 11509 words.

In this paper, inflationary cosmology is reviewed, paying particular attention to its observational signatures associated with large-scale density perturbations generated from quantum...

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The Effects of Nonlinear Maxwell Source on the Magnetic Solutions in Einstein-Gauss-Bonnet Gravity

S. H. Hendi, S. Kordestani and S. N. Doosti Motlagh.

in Progress of Theoretical Physics

December 2010; p ublished online December 2010 .

Journal Article. Subjects: Relativity and Gravitation. 0 words.

Considering both the power Maxwell invariant source and the Einstein-Gauss-Bonnet gravity, we present a new class of static solutions that yields a spacetime with a longitudinal nonlinear...

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