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arXiv 1908.04830gr-qcastro-ph.GAhep-th
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具有暗额外维的引力理论

Gravity theory with a dark extra dimension

Sandipan Sengupta

摘要:

我们建立了一个真空引力理论,其额外维度为零的真长。给出了场方程的最一般解。这个公式没有卡鲁扎-克莱因模式,并且不允许引力子沿着不可见的第五方向传播。除了真空能量和辐射,相关的涌现理论还表现出非传播的矢量张量多重态,这在标准爱因斯坦引力中是没有类似物的。它是自然惰性的,服从有界状态方程,具有与普通物质完全不同的耦合特性。基于这些独特的特征,我们提出这种几何多重态可以取代假设的"暗物质“。作为支持这种可能性的进一步证据,我们表明,银河系的旋转曲线被预测为渐近平坦。

英文摘要:

We set up a vacuum theory of gravity with an extra dimension of vanishing proper length. The most general solution to the field equations are presented. This formulation is free of Kaluza-Klein modes and does not allow the propagation of gravitons along the invisible fifth direction. Apart from a vacuum energy and radiation, the associated emergent theory exhibits a nonpropagating vector-tensor multiplet which has no analogue in standard Einstein gravity. It is naturally inert, obeys a bounded equation of state and has coupling properties radically different from ordinary matter. Based on these distinctive features, we propose that this geometric multiplet could supercede the hypothetical ``dark matter''. As further evidence in support of this possibility, we show that the galactic rotation curves are predicted to be asymptotically flat.

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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