论文标题
二次重力，双层和非保守能量巨型张量
Quadratic Gravity, double layers and non-conservative energy-momentum tensor
论文作者
论文摘要
在本文中，我们研究了二次重力的保守条件。 It is shown explicitly that the Bianchi identities lead to the conservative condition of the left-hand-side of the (gravitational) field equation.因此，总能量量张量在整体中是保守的（就像一般相对论一样）。 However, in Quadratic Gravity it is possible to have singular hupersurfaces separating the bulk regions with different behavior of the matter energy-momentum tensor or different vacua.他们需要特殊考虑。我们在这种奇异的曲面上得出了保守的条件，并证明了这一问题的可能性。在本文的其余部分中，我们考虑了一些说明获得结果的应用。
In the present paper we investigate the conservative conditions in Quadratic Gravity. It is shown explicitly that the Bianchi identities lead to the conservative condition of the left-hand-side of the (gravitational) field equation. Therefore, the total energy-momentum tensor is conservative in the bulk (like in General Relativity). However, in Quadratic Gravity it is possible to have singular hupersurfaces separating the bulk regions with different behavior of the matter energy-momentum tensor or different vacua. They require special consideration. We derived the conservative conditions on such singular hypersurfaces and demonstrated the very possibility of the matter creation. In the remaining part of the paper we considered some applications illustrating the obtained results.
