Zobrazeno 1 - 10
of 88
pro vyhledávání: '"De-Chang Dai"'
Autor:
De-Chang Dai
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 9, Pp 1-9 (2024)
Abstract We study the properties of massive fermions created and scattered by a rotating Kerr black hole. The helicities of the scattered fermions can vary during propagation. A fermion with a right-handed helicity can become either right or left-han
Externí odkaz:
https://doaj.org/article/e1f2393ab47e47a8b4551787fe0e1601
Autor:
De-Chang Dai, Dejan Stojkovic
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 2, Pp 1-7 (2024)
Abstract We demonstrate that a model with extra dimensions formulated in Csaki et al. (Phys Rev D 62:045015, 2000), which fatefully reproduces Friedmann–Robertson–Walker (FRW) equations on the brane, allows for an apparent superluminal propagatio
Externí odkaz:
https://doaj.org/article/cc2c18d7c7814b6c8d38f23b47b7a26e
Autor:
De-Chang Dai, Dejan Stojkovic
Publikováno v:
Physics Letters B, Vol 843, Iss , Pp 138056- (2023)
Emission of particles created in the background of a rotating black hole can be greatly amplified taking away rotational energy of a black hole. This amplification affects both particles created near the horizon (due to the Hawing effect), and partic
Externí odkaz:
https://doaj.org/article/2de3d0de880046abbf2c7c2c74e141bc
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 3, Pp 1-17 (2022)
Abstract Cosmological domain walls can be formed as a result of symmetry breaking at any epoch during the evolution of our universe. We study their interaction with a classical macroscopic object, like Earth or a satellite in Earth’s orbit. We set
Externí odkaz:
https://doaj.org/article/d1fcf96ba280401689c569dc7d05e08a
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 12, Pp 1-14 (2021)
Abstract The extended black hole thermodynamics in which the cosmological constant plays the role of pressure significantly enriches the phase structure of the theory. In order to understand the extended black hole thermodynamics more precisely, we l
Externí odkaz:
https://doaj.org/article/f1c8c9b56adc4cc699dea4136e51f806
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
The relative flow of the Schwarzschild vs. the proper time during the classical evolution of a collapsing shell in the Schwarzschild coordinates practically forces us to interpret black hole formation as a highly non-local quantum process in which a
Externí odkaz:
https://doaj.org/article/b095a95be82d4fa7b7d4bf5a405df60d
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 12, Pp 1-6 (2020)
Abstract We provide a simple but very useful description of the process of wormhole formation. We place two massive objects in two parallel universes (modeled by two branes). Gravitational attraction between the objects competes with the resistance c
Externí odkaz:
https://doaj.org/article/e498208104e143519e31547dc0622f72
Autor:
De-Chang Dai, Dejan Stojkovic
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 11, Pp 1-7 (2017)
Abstract We point out that recent Verlinde’s proposal of emergent gravity suffers from some internal inconsistencies. The main idea in this proposal is to preserve general relativity at short scales where numerous tests verified its validity, but m
Externí odkaz:
https://doaj.org/article/4bf1899422c04185be77d84399cd69a7
Autor:
De-Chang Dai, Dejan Stojkovic
Publikováno v:
Physics Letters B, Vol 758, Iss C, Pp 412-415 (2016)
We study radiation emitted during the gravitational collapse from two different types of shells. We assume that one shell is made of dark matter and is completely transparent to the test scalar (for simplicity) field which belongs to the standard mod
Externí odkaz:
https://doaj.org/article/818880e4a3d94d8e8bf89f37fdad047b
Pre-Hawking radiation may allow for reconstruction of the mass distribution of the collapsing object
Autor:
De-Chang Dai, Dejan Stojkovic
Publikováno v:
Physics Letters B, Vol 758, Iss C, Pp 429-433 (2016)
Hawking radiation explicitly depends only on the black hole's total mass, charge and angular momentum. It is therefore generally believed that one cannot reconstruct the information about the initial mass distribution of an object that made the black
Externí odkaz:
https://doaj.org/article/4324194f73ea439eb9bed0f4aba605b3