کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10725748 1034191 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Decoupling and reduction in Chern-Simons modified gravity
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Decoupling and reduction in Chern-Simons modified gravity
چکیده انگلیسی
We show that for four-dimensional spacetimes with a non-null hypersurface orthogonal Killing vector and for a Chern-Simons (CS) background (non-dynamical) scalar field, which is constant along the Killing vector, the source-free equations of CS modified gravity decouple into their Einstein and Cotton constituents. Thus, the model supports only general relativity solutions. We also show that, when the cosmological constant vanishes and the gradient of the CS scalar field is parallel to the non-null hypersurface orthogonal Killing vector of constant length, CS modified gravity reduces to topologically massive gravity in three dimensions. Meanwhile, with the cosmological constant such a reduction requires an appropriate source term for CS modified gravity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 690, Issue 2, 14 June 2010, Pages 196-200
نویسندگان
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