共查询到20条相似文献,搜索用时 15 毫秒
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González-Díaz PF 《Physical review D: Particles and fields》1996,54(2):1856-1859
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Iwazaki A 《Physical review D: Particles and fields》1990,41(10):3280-3282
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James Isenberg Rafe Mazzeo Daniel Pollack 《Communications in Mathematical Physics》2002,231(3):529-568
We establish a general gluing theorem for constant mean curvature solutions of the vacuum Einstein constraint equations.
This allows one to take connected sums of solutions or to glue a handle (wormhole) onto any given solution. Away from this
handle region, the initial data sets we produce can be made as close as desired to the original initial data sets. These constructions
can be made either when the initial manifold is compact or asymptotically Euclidean or asymptotically hyperbolic, with suitable
corresponding conditions on the extrinsic curvature. In the compact setting a mild nondegeneracy condition is required. In
the final section of the paper, we list a number ways this construction may be used to produce new types of vacuum spacetimes.
Received: 4 October 2001 / Accepted: 26 July 2002 Published online: 29 October 2002
RID="*"
ID="*" Supported by the NSF under Grant PHY-0099373
RID="**"
ID="**" Supported by the NSF under Grant DMS-9971975 and at MSRI by NSF grant DMS-9701755
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ID="***" Supported by the NSF under Grant DMS-9704515 相似文献
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The linearized stability of charged thin shell wormholes under spherically symmetric perturbations is analyzed. It is shown that the presence of a large value of charge provides stabilization to the system, in the sense that the constraints onto the equation of state are less severe than for non-charged wormholes. 相似文献
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We show that the Giddings-Strominger-like wormholes exist in the systems comprised of SUL(n)×SUR(n) or O(n) non-linear a models coupled to O(4) symmetric gravity. Some details are discussed for the case of SUL(2)×SUR(2) and two kinds of wormhole instantons are shown. 相似文献
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Y. Kwon 《Zeitschrift fur Physik C Particles and Fields》1991,51(3):455-458
On the compactified moduli space we consider theN=2,N=4 local supersymmetric string theories. It would be proven that theN=2,N=4 fermionic string theories might not develop any tachyon pole, which might imply theg-loop partition functions forN=2,N=4 fermionic string would be finite. 相似文献
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《Nuclear Physics B》1986,278(4):819-832
We covariantly first-quantize, via the BRST approach, the closed bosonic string compactified on a torus — in particular the 18-dimensional theory with E8 × E8 gauge bosons. Further, we give the corresponding free field theory. Thus the model is ready for the introduction of string interactions, and may be very useful for the study of gauge interactions in string theories. 相似文献
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S. A. Merkulov 《Zeitschrift fur Physik C Particles and Fields》1991,52(4):583-588
The quantum GrassmanianG(2|0; ? q 4|0 ) of “quantum 2-planes ? q 2|0 in the quantum 4-plane ? q 4|0 ”, which provides aq-deformation of compactified complexified Minkowski space, is proposed. A quantum analogue of classical Plücker embedding of the usual GrassmanianG(2; ?2) into a non-degenerate quadric in ??5 is found. 相似文献
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F. Darabi 《International Journal of Theoretical Physics》2012,51(2):501-506
We investigate the necessary condition for the existence of classical Euclidean wormholes in a conformally non-invariant gravitational
model minimally coupled to an scalar field. It is shown that while the original Ricci tensor with positive eigenvalues does
not allow the Euclidean wormholes to occur, under dynamical conformal transformations the Ricci tensor, with respect to the
original metric, is dynamically coupled with the conformal field and its eigenvalues may become negative allowing the Euclidean
wormholes to occur. Therefore, it is conjectured that dynamical conformal transformations may provide us with effective forms of matter sources leading to Euclidean wormholes in conformally non-invariant systems. 相似文献
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