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19932026
Showing 1999 · gr-qcShow all

7 papers · 2 filters

gr-qc1999

Can Black Hole be Created at the Birth of the Universe?

Zhong Chao Wu

We study the quantum creation of black hole pairs in the (anti-)de Sitter space background. These black hole pairs in the Kerr-Newman family are created from constrained instantons…

gr-qc1999

Entropy of a Black Hole with Distinct Surface Gravities

Zhong Chao Wu

In gravitational thermodynamics, the entropy of a black hole with distinct surface gravities can be evaluated in a microcanonical ensemble. At the level, the entropy becomes…

gr-qc1999

Gravitational Thermodynamics of Space-time Foam in One-loop Approximation

Liao Liu, Yongge Ma

We show from one-loop quantum gravity and statistical thermodynamics that the thermodynamics of quantum foam in flat space-time and Schwarzschild space-time is exactly the same as…

gr-qc1999★ 1 cited

Quantum Creation of BTZ Black Hole

Zhong Chao Wu

The constrained instanton method is used to study quantum creation of a black hole. It is found that the relative creation probability is the exponential of the negative sum…

gr-qc1999★ 3 cited

Quantum Creation of Topological Black Hole

Zhong Chao Wu

The constrained instanton method is used to study quantum creation of a vacuum or charged topological black hole. At the level, the relative creation probability is the expon…

gr-qc1999★ 4 cited

Causal structure and degenerate phase boundaries

Yongge Ma, Canbin Liang

Timelike and null hypersurfaces in the degenerate space-times in the Ashtekar theory are defined in the light of the degenerate causal structure proposed by Matschull. Using the ne…