Phantom Behavior in Chameleon Brans-Dicke Theory.
We consider a generalized Brans-Dicke model in which the scalar field has a potential function and is allowed to couple non-minimally with the matter part. We then assume that the scalar field is a chameleon field. We find an asymptotic late-time solution which exhibits late-time accelerating expansion for large and positive Brans-Dick parameter. The solution indicates that the chameleon appears as a phantom field. We argue that the second law of thermodynamics constrains the direction of energy transfer between the scaler field and the matter system.
Publisher URL: http://arxiv.org/abs/1711.05426
DOI: arXiv:1711.05426v1
Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.
Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.