Complete Hamiltonian analysis of cosmological perturbations at all orders II: non-canonical scalar field
Complete Hamiltonian analysis of cosmological perturbations at all orders II: non-canonical scalar field
复制标题
所有阶宇宙扰动的完整哈密顿分析 II:非正则标量场
DOI:
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
S. Shankaranarayanan
中科院分区:
文献类型:
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作者:
Debottam Nandi;S. Shankaranarayanan
In this work, we present a consistent Hamiltonian analysis of cosmological perturbations for generalized non-canonical scalar fields. In order to do so, we introduce a new phase-space variable that is uniquely defined for different non-canonical scalar fields. We also show that this is the simplest and efficient way of expressing the Hamiltonian. We extend the Hamiltonian approach of [1] to non-canonical scalar field and obtain an unique expression of speed of sound in terms of phase-space variable. In order to invert generalized phase-space Hamilton's equations to Euler-Lagrange equations of motion, we prescribe a general inversion formulae and show that our approach for non-canonical scalar field is consistent. We also obtain the third and fourth order interaction Hamiltonian for generalized non-canonical scalar fields and briefly discuss the extension of our method to generalized Galilean scalar fields.
影响因子:
8.7
作者:
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者:
Wright, E. L.