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arXiv 0705.3193gr-qchep-th
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非时平均零能条件

Achronal averaged null energy condition

Noah Graham, Ken D. Olum

摘要:

平均零能量条件(ANEC)要求应力-能量张量投影到测地线切向量上的完全零测地线上的积分永远不为负。这个条件足以证明广义相对论中的许多重要定理,但它被弯曲时空中的量子场所违背。然而,有一个较弱的条件,这是免费的已知违反,只需要没有自洽的时空在半经典引力中,其中ANEC是违反一个完整的,{ \em achronal}零测地线。我们指出,为什么这样的条件可能是预期举行,并表明它足以排除虫洞和封闭的类时曲线。

英文摘要:

The averaged null energy condition (ANEC) requires that the integral over a complete null geodesic of the stress-energy tensor projected onto the geodesic tangent vector is never negative. This condition is sufficient to prove many important theorems in general relativity, but it is violated by quantum fields in curved spacetime. However there is a weaker condition, which is free of known violations, requiring only that there is no self-consistent space-time in semiclassical gravity in which ANEC is violated on a complete, {\em achronal} null geodesic. We indicate why such a condition might be expected to hold and show that it is sufficient to rule out wormholes and closed timelike curves.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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