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Chaplygin gas may prevent big trip

By J. A. Jiménez Madrid


This Letter deals with the study of the accretion of a generalized Chaplygin gas with equation of state p=-A/ρα onto wormholes. We have obtained that when dominant energy condition is violated the size of wormhole increases with the scale factor up to a given plateau. On the regime where the dominant energy condition is satisfied our model predicts a steady decreasing of the wormhole size as generalized Chaplygin gas is accreted. Our main conclusion is that the big trip mechanism is prevented in a large region of the physical parameters of the used model. © 2006 Elsevier B.V. All rights reserved.We acknowledge P.F. González-Díaz, María del Prado Martín and Milagros Rodríguez for constructive discussions and criticisms. This work was supported by DGICYT under Research Projects BMF2002-03758 and BFM2002-00778.Peer Reviewe

Publisher: 'Elsevier BV'
Year: 2012
DOI identifier: 10.1016/j.physletb.2006.01.060
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Provided by: Digital.CSIC
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