摘要
如果考虑到存在宇宙常数Λ的时空,那么传统的Einstein,Landau,Lifshitz,Mφller,Papa-petro的能动量赝张量就不能给出一个确定的和守恒的能量.这样就必须对不等于零的Λ模型中的能量进行修正(如果不舍弃这个能量),正如Arnowitt-Deser-Misner(ADM)项和Abbott-Deser(AD)修正项一样,总可以找到一个更加基础和成功的方法来修正这个Einstein赝张量,但是(值得注意的是)对其他的赝张量却并不适用.修正的Einstein能量可给出在de Sitter(dS)和anti-de Sitter(AdS)背景中正确的结果,同时也可避免在dS情况下AD能量的一个奇异的宇宙常数视界的问题.
If naively applied to spacetimes with a cosmological ∧, the traditional energy-momentum pseudotensors of Einstein, Landau and Lifshitz, Mψller, Papapetro et al do not guarantee a finite and conserved energy, therefore must be upgraded(if not discatded)for a nonzero ∧, as was done from the Arnowitt-Deser-Misner (ADM) scheme and Abbott-Deser(AD) scheme. The authors find a quite natural and successful upgrading for the pseudotensor of Einstein, but(notably)not the others. The upgrading Einstein energy gives the correct result for both de Sitter(dS) and anti-de Sitter(AdS) backgrounds, and avoids the singularity with a cosmological horizon in the AD energy for the dS case.
出处
《四川大学学报(自然科学版)》
CAS
CSCD
北大核心
2006年第6期1327-1331,共5页
Journal of Sichuan University(Natural Science Edition)
关键词
爱因斯坦赝张量
能动量赝张量
AD能量
Einstein pseudotensors
energy-momentum pseudotensors
AD energy