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arXiv 1305.6972gr-qchep-thmath-phmath.MP
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从欧氏空间的共形对称性看时间和暗物质

Time and dark matter from the conformal symmetries of Euclidean space

Jeffrey S Hazboun, James T Wheeler

摘要:

欧氏四维空间的共形群与其Weyl子群的商导致一个几何拥有相对论相空间的许多性质,包括自然辛形式和非退化的Killing度量。我们表明,通解possesses正交拉格朗日子流形,与诱导度量和自旋连接的子流形必然洛仑兹,尽管欧几里德开始点。通过考察双共形空间在一个与其相空间性质相适应的正交标架中的结构方程,我们还发现在这个几何中存在两个新的张量场,而这两个张量场在黎曼几何中是不存在的。第一个是Weyl向量与度量上的比例因子的组合,并确定子流形上的类时方向。第二个来自自旋联系的分量,关于新度规对称。虽然这个场来自自旋联系,但它均匀地变换。最后,我们证明了在没有共形曲率或源的情况下,位形空间具有与理想流体和宇宙学常数等价的几何项。

英文摘要:

The quotient of the conformal group of Euclidean 4-space by its Weyl subgroup results in a geometry possessing many of the properties of relativistic phase space, including both a natural symplectic form and non-degenerate Killing metric. We show that the general solution posesses orthogonal Lagrangian submanifolds, with the induced metric and the spin connection on the submanifolds necessarily Lorentzian, despite the Euclidean starting pont. By examining the structure equations of the biconformal space in an orthonormal frame adapted to its phase space properties, we also find that two new tensor fields exist in this geometry, not present in Riemannian geometry. The first is a combination of the Weyl vector with the scale factor on the metric, and determines the timelike directions on the submanifolds. The second comes from the components of the spin connection, symmetric with respect to the new metric. Though this field comes from the spin connection it transforms homogeneously. Finally, we show that in the absence of conformal curvature or sources, the configuration space has geometric terms equivalent to a perfect fluid and a cosmological constant.

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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