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arXiv 0906.4983gr-qchep-th
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f(R)引力的各种哈密顿形式及其正则关系

Various Hamiltonian formulations of f(R) gravity and their canonical relationships

Nathalie Deruelle, Yuuiti Sendouda, Ahmed Youssef

摘要:

f(R)引力的各种哈密顿公式可以在文献中找到。一些作者遵循Ostrogradsky治疗的高阶导数理论,并引入额外的变量一阶时间导数的度量(通常是外在曲率)。另一些则利用f(R)理论与爱因斯坦引力耦合到标量场的共形等价性,并引入标量曲率R本身作为额外变量,其中包括度规的二阶时间导数。我们表明,相反的一些索赔,这些配方相关的典型的变换。

英文摘要:

Various Hamiltonian formulations of f(R) gravity can be found in the literature. Some authors follow the Ostrogradsky treatment of higher derivative theories and introduce as extra variables first order time derivatives of the metric (typically the extrinsic curvature). Some others take advantage of the conformal equivalence of f(R) theory with Einstein's gravity coupled to a scalar field and introduce as an extra variable the scalar curvature R itself, which includes second time derivatives of the metric. We show that, contrarily to some claims, these formulations are related by canonical transformations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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