Visible branes with negative tension in heterotic M-theory
Visible branes with negative tension in heterotic M-theory
复制标题
杂种优势 M 理论中具有负张力的可见膜
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
N. Turok
中科院分区：
文献类型：
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作者：
R. Donagi;J. Khoury;B. Ovrut;P. Steinhardt;N. Turok
证明了在杂化M理论中存在着大类的BPS真空，它们在可见轨道平面上具有负张力，在隐平面上具有正张力，在体空间上具有正张力的物理五膜.明确的例子，这样的真空。此外，它表明，比，？/|?|,对于几大类这样的真空，可以使体积五膜张力与可见平面张力之比任意小。因此，找到具有宇宙学的Ekpyrotic理论的例子中所要求的性质的真空是很简单的-一个具有负张力的可见膜和？/|?|小了这与最近文献中的说法相矛盾。
It is shown that there exist large classes of BPS vacua in heterotic M-theory which have negative tension on the visible orbifold plane, positive tension on the hidden plane and positive tension, physical five-branes in the bulk space. Explicit examples of such vacua are presented. Furthermore, it is demonstrated that the ratio, ?/|?|, of the bulk five-brane tension to the visible plane tension can, for several large classes of such vacua, be made arbitrarily small. Hence, it is straightforward to find vacua with the properties required in the examples of the Ekpyrotic theory of cosmology - a visible brane with negative tension and ?/|?| small. This contradicts recent claims in the literature.