Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Gerald Cleaver"'
Autor:
Ramesh Radhakrishnan, Patrick Brown, Jacob Matulevich, Eric Davis, Delaram Mirfendereski, Gerald Cleaver
Publikováno v:
Symmetry, Vol 16, Iss 8, p 1007 (2024)
It has been proven that in standard Einstein gravity, exotic matter (i.e., matter violating the pointwise and averaged Weak and Null Energy Conditions) is required to stabilize traversable wormholes. Quantum field theory permits these violations due
Externí odkaz:
https://doaj.org/article/396d0fe9cdab48008eb2ed8bd26780b6
Autor:
Rui Pan, John Joseph Marchetta, Jamal Saeed, Gerald Cleaver, Bao-Fei Li, Anzhong Wang, Tao Zhu
Publikováno v:
Universe, Vol 9, Iss 11, p 471 (2023)
In this paper, we study analytical approximate solutions for second-order homogeneous differential equations with the existence of only two turning points (but without poles) by using the uniform asymptotic approximation (UAA) method. To be more conc
Externí odkaz:
https://doaj.org/article/9ce4a56f23ef4b1fb5e7792f1e84eb01
Publikováno v:
Physics Letters B, Vol 773, Iss , Pp 196-202 (2017)
In this Letter, we study analytically the evolutions of the flat Friedmann–Lemaitre–Robertson–Walker (FLRW) universe and its linear perturbations in the framework of the dressed metric approach in loop quantum cosmology (LQC). Assuming that the
Externí odkaz:
https://doaj.org/article/09b393bd1bf04583be08c2e7443f1ec4
Autor:
Brandon Mattingly, Abinash Kar, William Julius, Matthew Gorban, Cooper Watson, MD Ali, Andrew Baas, Caleb Elmore, Bahram Shakerin, Eric Davis, Gerald Cleaver
Publikováno v:
Universe, Vol 6, Iss 1, p 11 (2020)
The curvature invariants of three Lorentzian wormholes are calculated and plotted in this paper. The plots may be inspected for discontinuities to analyze the traversability of a wormhole. This approach was formulated by Henry, Overduin, and Wilcomb
Externí odkaz:
https://doaj.org/article/32ab57a7f5984c50810fce7907440d62
Publikováno v:
Symmetry, Vol 13, Iss 1469, p 1469 (2021)
Symmetry
Volume 13
Issue 8
Symmetry
Volume 13
Issue 8
In the years 1917–1919 Tullio Levi-Civita published a number of papers presenting new solutions to Einstein’s equations. This work, while partially translated, remains largely inaccessible to English speaking researchers. In this paper we review
Publikováno v:
Physical Review D
We consider a spherically symmetric line element which admits either a black hole geometry or a wormhole geometry and show that in both cases the apparent horizon or the wormhole throat is partially characterized by the zero-set of a single curvature
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::958fa1ebc91e6adb9866d87b4fffe336
https://hdl.handle.net/11250/3053171
https://hdl.handle.net/11250/3053171
Autor:
Caleb Elmore, Abinash Kar, E. W. Davis, Cooper Watson, Brandon Mattingly, Jeffrey S. Lee, Bahram Shakerin, William Julius, Ali, Gerald Cleaver, Matthew Gorban, Andrew Baas
Publikováno v:
Universe
Volume 7
Issue 2
Universe, Vol 7, Iss 21, p 21 (2021)
Volume 7
Issue 2
Universe, Vol 7, Iss 21, p 21 (2021)
A process for using curvature invariants is applied to evaluate the metrics for the Alcubierre and the Natá
rio warp drives at a constant velocity. Curvature invariants are independent of coordinate bases, so plotting these invariants will
rio warp drives at a constant velocity. Curvature invariants are independent of coordinate bases, so plotting these invariants will
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b55954fca80e57b306597c9d4ecff344
http://arxiv.org/abs/2010.13693
http://arxiv.org/abs/2010.13693
Autor:
Cooper Watson, Ali, Brandon Mattingly, Matthew Gorban, E. W. Davis, Andrew Baas, Jeffrey S. Lee, Abinash Kar, Caleb Elmore, Bahram Shakerin, Gerald Cleaver, William Julius
Publikováno v:
Particles
Volume 3
Issue 3
Pages 42-659
Particles, Vol 3, Iss 42, Pp 642-659 (2020)
Volume 3
Issue 3
Pages 42-659
Particles, Vol 3, Iss 42, Pp 642-659 (2020)
A process for using curvature invariants is applied to evaluate the accelerating Natá
rio warp drive. Curvature invariants are independent of coordinate bases and plotting the invariants is free of coordinate mapping distortions. While pre
rio warp drive. Curvature invariants are independent of coordinate bases and plotting the invariants is free of coordinate mapping distortions. While pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1af585dffda118d914b8fb487c5ad522
Autor:
Gerald Cleaver
The term multiverse is derived from multiple universes. A multiverse is a theoretical concept denoting a collection of universes that are causally disconnected and whatever may exist beyond or between the boundaries of these universes. In essence, it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddfc2669207a27de5dcabcc7ddd6797f
https://doi.org/10.1093/acrefore/9780199340378.013.157
https://doi.org/10.1093/acrefore/9780199340378.013.157
Autor:
Yanbin Deng, Gerald Cleaver
Publikováno v:
International Journal of Theoretical Physics. 56:741-750
The notion of black hole singularity and the proof of the singularity theorem were considered great successes in classical general relativity whereas they meanwhile brought with deep puzzles. Conceptual challenges were set up by the intractability of