SCOAP3 Repository 17 records found  1 - 10nextSearch took 0.02 seconds. 
1. Quantum creation of traversable wormholes ex nihilo in Gauss–Bonnet-dilaton gravity / Tumurtushaa, Gansukh ; Yeom, Dong-han
We investigate a nucleation of a Euclidean wormhole and its analytic continuation to Lorentzian signatures in Gauss–Bonnet-dilaton gravity, where this model can be embedded by the type-II superstring theory. [...]
Published in EPJC 79 (2019) 488 10.1140/epjc/s10052-019-7011-1
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2. Suppression of long-wavelength CMB spectrum from the no-boundary initial condition / Chen, Pisin ; Lin, Yu-Hsiang ; Yeom, Dong-han
The lack of correlations at the long-wavelength scales of the cosmic microwave background spectrum is a long-standing puzzle and it persists in the latest Planck data. [...]
Published in EPJC 78 (2018) 930 10.1140/epjc/s10052-018-6426-4
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3. Why concave rather than convex inflaton potential? / Chen, Pisin ; Yeom, Dong-han
The Planck data on cosmic microwave background indicates that the Starobinsky-type model with concave inflation potential is favored over the convex-type chaotic inflation. [...]
Published in EPJC 78 (2018) 863 10.1140/epjc/s10052-018-6357-0
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4. On singularity-resolution in mimetic gravity / Brahma, Suddhasattwa ; Golovnev, Alexey ; Yeom, Dong-han
Recently, it was shown that modified mimetic gravity, with a f(□ϕ) term, results in a singularity-free model of gravity, for both cosmological and black hole spacetimes [1,2] . [...]
Published in Physics letters B (2018) 10.1016/j.physletb.2018.05.039
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5. Tunneling decay of false vortices with gravitation / Dupuis, Éric ; Gobeil, Yan ; Lee, Bum-Hoon ; Lee, Wonwoo ; et al
We study the effect of vortices on the tunneling decay of a symmetry-breaking false vacuum in three spacetime dimensions with gravity. [...]
Published in JHEP 1711 (2017) 028 10.1007/JHEP11(2017)028 arXiv:1709.03839
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6. Thermal activation of thin-shells in anti-de Sitter black hole spacetime / Chen, Pisin ; Domènech, Guillem ; Sasaki, Misao ; Yeom, Dong-han
We investigate thermal activation of thin-shells around anti-de Sitter black holes. [...]
Published in JHEP 1707 (2017) 134 10.1007/JHEP07(2017)134 arXiv:1704.04020
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7. Scalar field as an intrinsic time measure in coupled dynamical matter-geometry systems. II. Electrically charged gravitational collapse / Nakonieczna, Anna ; Yeom, Dong-han
Investigating the dynamics of gravitational systems, especially in the regime of quantum gravity, poses a problem of measuring time during the evolution. [...]
Published in JHEP 1605 (2016) 155 10.1007/JHEP05(2016)155 arXiv:1604.04718
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8. Stationary bubbles and their tunneling channels toward trivial geometry / Chen, Pisin ; Domènech, Guillem ; Sasaki, Misao ; Yeom, Dong-han
In the path integral approach, one has to sum over all histories that start from the same initial condition in order to obtain the final condition as a superposition of histories. [...]
Published in JCAP 1604 (2016) 013 10.1088/1475-7516/2016/04/013 arXiv:1512.00565
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9. Phantom of the Hartle–Hawking instanton: connecting inflation with dark energy / Chen, Pisin ; Qiu, Taotao ; Yeom, Dong-han
If the Hartle–Hawking wave function is the correct boundary condition of our universe, the history of our universe will be well approximated by an instanton. [...]
Published in EPJC 76 (2016) 91 10.1140/epjc/s10052-016-3932-0
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10. Scalar field as an intrinsic time measure in coupled dynamical matter-geometry systems. I. Neutral gravitational collapse / Nakonieczna, Anna ; Yeom, Dong-han
There does not exist a notion of time which could be transferred straightforwardly from classical to quantum gravity. [...]
Published in JHEP 1602 (2016) 049 10.1007/JHEP02(2016)049 arXiv:1512.06712
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