Lorentz invariant dark-spinor and inflation
作者： Abhishek Basak , Jitesh R. Bhatt
DOI: 10.1088/1475-7516/2011/06/011
关键词: Classical mechanics 、 Scalar field 、 Spinor field 、 Spinor 、 Inflation (cosmology) 、 Scalar (physics) 、 Mathematical physics 、 Physics 、 Lorentz covariance 、 Tensor 、 Astrophysics 、 Gravitational field
摘要: We investigate the possibility of inflation driven by a Lorentz invariant non-standard spinor field. As these spinors are having dominant interaction via gravitational field only, they considered as \emph{Dark Spinors}. study how dark-spinors can drive and cosmological (scalar) perturbations generated them. Though obey Klein-Gordon like equation, underlying theory is far more complex than theories which using canonical scalar For example sound speed not constant but varies with time. find that in order to explain observed value spectral-index $n_s$ one must have upper bound on values background NSS-field. The tensor ratio remains small case because correction spectrum due NSS required be very small. In addition we discuss relationship results previous obtained invariance violating theories.
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