https://doi.org/10.1140/epjc/s10052-010-1325-3
Regular Article - Theoretical Physics
Wormholes supported by polytropic phantom energy
1
Center for Advanced Mathematics and Physics, National University of Sciences and Technology, E&ME campus, Peshawar Road, Rawalpindi, 46000, Pakistan
2
Department of Mathematics, Milwaukee School of Engineering, Milwaukee, WI, 53202-3109, USA
3
Department of Mathematics, Jadavpur University, Kolkata, 700032, India
* e-mail: mjamil@camp.nust.edu.pk
Received:
12
November
2009
Revised:
14
March
2010
Published online:
28
April
2010
It is generally agreed that the acceleration of the Universe can best be explained by the presence of dark or phantom energy. The equation of state of the latter shows that the null energy condition is violated. Such a violation is the primary ingredient for sustaining traversable wormholes. This paper discusses wormholes supported by a more general form called polytropic phantom energy. Its equation of state results in significant generalizations of the phantom-energy and, in some cases, the generalized Chaplygin-gas wormhole models, both of which continue to receive considerable attention from researchers. Several specific solutions are explored, namely, a constant redshift function, a particular choice of the shape function, and an isotropic-pressure model with various shape functions. Some of the wormhole spacetimes are asymptotically flat, but most are not.
© Springer-Verlag / Società Italiana di Fisica, 2010