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pro vyhledávání: '"Peter K. F. Kuhfittig"'
Autor:
Peter K. F. Kuhfittig
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 8, Pp 1-5 (2021)
Abstract The embedding of a curved spacetime in a higher-dimensional flat spacetime has continued to be a topic of interest in the general theory of relativity, as exemplified by the induced-matter theory. This paper deals with spacetimes of embeddin
Externí odkaz:
https://doaj.org/article/d64492ac04484bdf8b32c68dc16f6411
Autor:
Peter K. F. Kuhfittig
Publikováno v:
Letters in High Energy Physics, Vol 2021, Iss 1 (2021)
The existence of charged black holes has suggested that wormholes may also be charged. The purpose of this paper is to construct a general model of a charged wormhole that proves to be a natural extension of the original Morris-Thorne wormhole. This
Externí odkaz:
https://doaj.org/article/2f38f4e34aa7439db820402f32fa950b
Autor:
Peter K. F. Kuhfittig
Publikováno v:
Letters in High Energy Physics, Vol 2021, Iss 1 (2021)
The strategy adopted in the original Morris-Thorne wormhole was to retain complete control over the geometry at the expense of certain engineering considerations. The purpose of this paper is to obtain several complete wormhole solutions by assuming
Externí odkaz:
https://doaj.org/article/1c8e73b02cc14f1ab8a82d01eb248df5
Autor:
Peter K. F. Kuhfittig
Publikováno v:
Advances in Mathematical Physics, Vol 2013 (2013)
Quark matter is believed to exist in the center of neutron stars. A combined model consisting of quark matter and ordinary matter is used to show that the extreme conditions existing in the center could result in a topology change, that is, in the fo
Externí odkaz:
https://doaj.org/article/076ab81c3e414bd3b87103e9a9817162
Autor:
Peter K. F. Kuhfittig
Publikováno v:
Advances in High Energy Physics, Vol 2012 (2012)
This paper reexamines a special class of thin-shell wormholes that are unstable in general relativity in the framework of noncommutative geometry. It is shown that, as a consequence of the intrinsic uncertainty, these wormholes are stable to small li
Externí odkaz:
https://doaj.org/article/f769806441ed4ebe8162f5da306f9f31
Autor:
Peter K. F. Kuhfittig
Publikováno v:
Journal of Applied Mathematics and Physics. :1263-1268
The Brouwer fixed-point theorem in topology states that for any continuous mapping $f$ on a compact convex set into itself admits a fixed point, i.e., a point $x_0$ such that $f(x_0)=x_0$. Under certain conditions, this fixed point corresponds to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a194a4417b196eab87556cf2c648f7c
https://doi.org/10.4236/jamp.2020.87096
https://doi.org/10.4236/jamp.2020.87096
Autor:
Peter K. F. Kuhfittig
The idea of an oscillating Universe has remained a topic of interest even after the discovery of dark energy. This paper confirms this idea by means of another well-established theory in general relativity, the embedding of curved spacetimes in highe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64f72a199251a4a6698b5bcb36490ec5
Autor:
Peter K. F. Kuhfittig
Publikováno v:
TURKISH JOURNAL OF PHYSICS. 43:213-220
This paper discusses the theoretical construction of thin-shell wormholes from Kiselev black holes. We assume a barotropic equation of state for the exotic matter on the shell. While most of these wormholes are unstable to linearized radial perturbat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe0191ea37c45c0cae8c8caaf5027417
https://doi.org/10.3906/fiz-1812-9
https://doi.org/10.3906/fiz-1812-9
Autor:
Peter K F Kuhfittig
It is well known that phantom energy, which is characterized by the equation of state $p=\omega\rho$, $\omega
Comment: 6 pages, no figures
Comment: 6 pages, no figures
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ced3c14ec9019abe67c471113526f87
Autor:
Peter K. F. Kuhfittig
It is well known that a Morris-Thorne wormhole can only be held open by violating the null energy condition, physically realizable by the use of "exotic matter." Unfortunately, even a small or moderately-sized wormhole would have a radial tension equ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::adb94b6cf3253dd2a17f0db89de447c8