Wormhole with varying cosmological constant

Author: Rahaman F.   Kalam M.   Sarker M.   Ghosh A.   Raychaudhuri B.  

Publisher: Springer Publishing Company

ISSN: 0001-7701

Source: General Relativity and Gravitation, Vol.39, Iss.2, 2007-02, pp. : 145-151

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Abstract

It has been suggested that the cosmological constant is a variable dynamical quantity. A class of solution has been presented for the spherically symmetric space time describing wormholes by assuming the erstwhile cosmological constant Λ to be a space variable scalar, viz., Λ = Λ (r) . It is shown that the averaged null energy condition (ANEC) violating exotic matter can be made arbitrarily small.