Surface stresses on a thin shell surrounding a traversable wormhole

被引:77
作者
Lobo, FSN [1 ]
机构
[1] Univ Lisbon, Ctr Astron & Astrofis, P-1749016 Lisbon, Portugal
关键词
D O I
10.1088/0264-9381/21/21/005
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We match an interior solution of a spherically symmetric traversable wormhole to a unique exterior vacuum solution, with a generic cosmological constant, at a junction interface, and the surface stresses on the thin shell are deduced. In the spirit of minimizing the usage of exotic matter we determine regions in which the weak and null energy conditions are satisfied on the junction surface. The characteristics and several physical properties of the surface stresses are explored, namely, regions where the sign of the tangential surface pressure is positive and negative (surface tension) are determined. This is done by expressing the tangential surface pressure as a function of several parameters, namely, that of the matching radius, the redshift parameter, the surface energy density and of the generic cosmological constant. An equation governing the behaviour of the radial pressure across the junction surface is also deduced.
引用
收藏
页码:4811 / 4832
页数:22
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