Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Cleaver, G. B."'
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 authors. In this paper we review these so
Externí odkaz:
http://arxiv.org/abs/2107.10360
Autor:
Shakerin, B., McNutt, D. D., Mattingly, B., Kar, A., Julius, W., Gorban, M., Watson, C., Brown, P., Lee, J. S., Davis, E. W., Cleaver, G. B.
A short review of scalar curvature invariants in gravity theories is presented. We introduce how these invariants are constructed and discuss the minimal number of invariants required for a given spacetime. We then discuss applications of these invar
Externí odkaz:
http://arxiv.org/abs/2106.05926
Autor:
Mattingly, B., Kar, A., Gorban, M., Julius, W., Watson, C. K., Ali, M. D., Baas, A., Elmore, C., Lee, J. S., Shakerin, B., Davis, E. W., Cleaver, G. B.
Publikováno v:
Particles 3 (2020) 642-659
A process for using curvature invariants is applied to evaluate the accelerating Natario warp drive. Curvature invariants are independent of coordinate bases and plotting the invariants is free of coordinate mapping distortions. While previous works
Externí odkaz:
http://arxiv.org/abs/2008.03366
Autor:
Mattingly, B., Kar, A., Julius, W., Gorban, M., Watson, C., Ali, M. D., Baas, A., Elmore, C., Shakerin, B., Davis, E. W., Cleaver, G. B.
Publikováno v:
Universe 6 (2020) no.1, 11
A process for using curvature invariants is applied as a new means to evaluate the traversability of Lorentzian wormholes and to display the wormhole spacetime manifold. This approach was formulated by Henry, Overduin and Wilcomb for Black Holes in R
Externí odkaz:
http://arxiv.org/abs/1806.10985
Publikováno v:
Int.J.Mod.Phys.A23:3461-3492,2008
In order to produce a low energy effective field theory from a string model, it is necessary to specify a vacuum state. In order that this vacuum be supersymmetric, it is well known that all field expectation values must be along so-called flat direc
Externí odkaz:
http://arxiv.org/abs/hep-th/0512020
Publikováno v:
Nucl.Phys.B620:259-289,2002
Recently, we presented the first non-Abelian flat directions that produce from a heterotic string model solely the three-generation MSSM states as the massless spectrum in the observable sector of the low energy effective field theory. In this paper
Externí odkaz:
http://arxiv.org/abs/hep-ph/0104091
Autor:
Cleaver, G. B.
Publikováno v:
Int.J.Mod.Phys. A16S1C (2001) 949-952
I review a heterotic-string solution in which the observable sector effective field theory just below the string scale reduces to that of the MSSM, with the standard observable gauge group being just SU(3)_C x SU(2)_L x U(1)_Y and the SU(3)_C x SU(2)
Externí odkaz:
http://arxiv.org/abs/hep-ph/0011020
Publikováno v:
Nucl.Phys.B600:315-333,2001
We present a systematic classification of field directions for the string-derived flipped SU(5) model that are D- and F-flat to all orders. Properties of the flipped SU(5) model with field values in these directions are compared to those associated w
Externí odkaz:
http://arxiv.org/abs/hep-ph/0009338
Publikováno v:
Int.J.Mod.Phys.A16:3565-3582,2001
The aim of superstring phenomenology is to develop the tools and methodology needed to confront string theory with experimental data. The first mandatory task is to find string solutions which reproduce the observable data. The subsequent goal is to
Externí odkaz:
http://arxiv.org/abs/hep-ph/0002292
Publikováno v:
Mod.Phys.Lett. A15 (2000) 1191-1202
Recently, by studying exact flat directions of non-Abelian singlet fields, we demonstrated the existence of free fermionic heterotic-string models in which the SU(3)_C x SU(2)_L x U(1)_Y-charged matter spectrum, just below the string scale, consists
Externí odkaz:
http://arxiv.org/abs/hep-ph/0002060