Ellis wormhole without a phantom scalar field
نویسندگان
چکیده
منابع مشابه
Maintaining a Wormhole with a Scalar Field
It is well known that it takes matter that violates the averaged weak energy condition to hold the throat of a wormhole open. The production of such “exotic” matter is usually discussed within the context of quantum field theory. In this paper I show that it is possible to produce the exotic matter required to hold a wormhole open classically. This is accomplished by coupling a scalar field to ...
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In this letter, we have considered the universe is filled with the mixture of tachyonic field and scalar or phantom field. If the tachyonic field interacts with scalar or phantom field, the interaction term decays with time and the energy for scalar field is transferred to tachyonic field or the energy for phantom field is transferred to tachyonic field. The tachyonic field and scalar field pot...
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The Ellis wormhole is known to be an exact solution of the Einstein–scalar system where the scalar field has negative kinetic energy (phantom). We show here that the same geometry (in 3+1 dimensions) can also be obtained with ‘tachyon matter’ as a source term in the field equations and a positive cosmological constant. The kink–like tachyon field profile and the nature of the tachyon potential ...
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Recent progress in theoretical physics suggests that the dark energy in the universe result from the Born-Infeld (B-I) type scalar field of string theory. The universe of B-I type scalar field with potential can undergo a phase of accelerated expansion. The corresponding equation of state parameter lies in the range of −1 < w < − 1 3. The equation of state parameter of B-I type scalar field wit...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2019
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.100.064007