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Not many results contain costesgrav

Search only for "costesgrav" acausality in nonlocal gravity theory?

  1. We investigate the nonlocal gravity theory by deriving nonlocal equations of motion using the traditional variation principle in a homogeneous background. We focus on a class of models with a linear nonlocal modification term in the action. It is found that the resulting equations of motion contain the advanced Green's function, implying that there is an acausality problem. As a consequence, a ...
  2. arXiv:1601.03808v1 [hep-th] 15 Jan 2016 Acausality in Nonlocal Gravity Theory Ying-li Zhanga,b∗, Kazuya Koyamab†, MisaoSasakic‡ andGong-Bo Zhaoa,b§ aNationalAstronomy Observatories, ChineseAcademy ofScience, Beijing100012, People'sRepublicofChina bInstitute ofCosmologyandGravitation, University ofPortsmouth, Portsmouth PO13FX,UK cYukawaInstitute forTheoretical Physics, KyotoUniversity ...
  3. link.springer.com

    We investigate the nonlocal gravity theory by deriving nonlocal equations of motion using the traditional variation principle in a homogeneous background. We focus on a class of models with a linear nonlocal modification term in the action. It is found that the resulting equations of motion contain the advanced Green's function, implying that there is an acausality problem. As a consequence ...
    Author:Ying li Zhang, Ying li Zhang, Kazuya Koyama, Misao Sasaki, Gong Bo Zhao, Gong Bo ZhaoPublished:2016
  4. pure.port.ac.uk

    On the other hand, several theoretical aspects of a theory with nonlocal terms remain to be clari ed. For instance, in order to transform the original integro-di erential equation into di erential equations, the nonlocal gravity theory is often written into a biscalar-tensor theory by introducing a scalar eld 2 1Rwith a Langrangian multiplier ...
  5. researchportal.port.ac.uk

    We investigate the nonlocal gravity theory by deriving nonlocal equations of motion using the traditional variation principle in a homogeneous background. We focus on a class of models with a linear nonlocal modification term in the action. ... T1 - Acausality in nonlocal gravity theory. AU - Zhang, Ying-li. AU - Koyama, Kazuya. AU - Sasaki ...
  6. semanticscholar.org

    We investigate the nonlocal gravity theory by deriving nonlocal equations of motion using the traditional variation principle in a homogeneous background. We focus on a class of models with a linear nonlocal modification term in the action. It is found that the resulting equations of motion contain the advanced Green's function, implying that there is an acausality problem. As a consequence ...
  7. arxiver.moonhats.com

    We investigate the nonlocal gravity theory by deriving nonlocal equations of motion using the traditional variation principle in a homogeneous background. We focus on a class of models with a linear nonlocal modification term in the action. ... It is found that the resulting equations of motion contain the advanced Green's function, implying ...
  8. link.aps.org

    In the absence of higher-derivative modifications, we work with a theory of Nreal scalar fields with the Lagrangian density L = 1 2 ∂µφ a∂µφa− 1 2 m2 φ aφ − 1 8 λ0(φ aφ)2. (2.1) This theory has an O(N) global symmetry, with the index arunning from 1 to N. The theory has a sensible N → ∞ limit, i.e., there are no Feynman ...

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