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  1. sciencedirect.com

    In Sec. 3, we constrain the forms of DHOST Lagrangians allowing for the existence of tracker and scaling solutions for Q = 0. In Sec. 4, we obtain the most general Lagrangian with scaling solutions for the field-dependent coupling Q (ϕ) and also derive the fixed points of the dynamical system for constant Q. Sec. 5 is devoted to conclusions. 2.
    Author:Noemi Frusciante, Ryotaro Kase, Kazuya Koyama, Shinji Tsujikawa, Daniele VernieriPublished:2019
  2. Title: Tracker and scaling solutions in DHOST theories. Authors: Noemi Frusciante, Ryotaro Kase, Kazuya Koyama, Shinji Tsujikawa, Daniele Vernieri. View a PDF of the paper titled Tracker and scaling solutions in DHOST theories, by Noemi Frusciante and 4 other authors.
    Author:Noemi Frusciante, Ryotaro Kase, Kazuya Koyama, Shinji Tsujikawa, Daniele VernieriPublished:2019
  3. data [47]. In DHOST theories, (approximate) tracker so-lutions were found for particular models [38, 48], but the general conditions for its existence have been unknown. In Horndeski theories, there is a special kind of tracker called the scaling solution [49-62] along which the field density ρφis proportional to the background matter den ...
    Author:Noemi Frusciante, Ryotaro Kase, Kazuya Koyama, Shinji Tsujikawa, Daniele VernieriPublished:2019
  4. academia.edu

    In DHOST theories, (approximate) tracker solutions were found for particular models [38, 48], but the general conditions for its existence have been unknown. In Horndeski theories, there is a special kind of tracker called the scaling solution [49-62] along which the field density ρφ is proportional to the background matter density ρm .
  5. waseda.elsevierpure.com

    In quadratic-order degenerate higher-order scalar-tensor (DHOST) theories compatible with gravitational-wave constraints, we derive the most general Lagrangian allowing for tracker solutions characterized by ϕ˙/H p =constant, where ϕ˙ is the time derivative of a scalar field ϕ H is the Hubble expansion rate, and p is a constant. While the tracker is present up to the cubic-order ...
  6. repo.scoap3.org

    The scaling solution, which corresponds to p = 1, is the unique case in which all the terms in the field density ρ ϕ and the pressure P ϕ obey the scaling relation ρ ϕ ∝ P ϕ ∝ H 2. Extending the analysis to the coupled DHOST theories with the field-dependent coupling Q ( ϕ ) between the scalar field and matter, we show that the ...
  7. inspirehep.net

    The scaling solution, which corresponds to p=1 , is the unique case in which all the terms in the field density ρϕ and the pressure Pϕ obey the scaling relation ρϕ∝Pϕ∝H2 . Extending the analysis to the coupled DHOST theories with the field-dependent coupling Q(ϕ) between the scalar field and matter, we show that the scaling solution ...
  8. semanticscholar.org

    Semantic Scholar extracted view of "Tracker and scaling solutions in DHOST theories" by N. Frusciante et al. ... {Frusciante2018TrackerAS, title={Tracker and scaling solutions in DHOST theories}, author={Noemi Frusciante and Ryotaro Kase and Kazuya Koyama and Shinji Tsujikawa and Daniele Vernieri}, journal={Physics Letters B}, year={2018}, url ...

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