arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0708.2483gr-qc
收藏

可视化弯曲时空

Visualizing curved spacetime

Rickard Jonsson

摘要:

我提出了一种可视化弯曲时空概念的方法。其结果是一个曲面与当地坐标系(闵可夫斯基系统)生活在它,给当地的方向的空间和时间。相对于这些系统,狭义相对论成立。该方法可用于可视化引力时间膨胀、黑洞视界和宇宙学模型。插图的基本思想是首先指定一个类时四速场。然后,在每一点,一个执行坐标变换到一个局部闵可夫斯基系统与给定的四速度共动。在局部系统中,度量的空间部分的符号被翻转以创建欧几里得签名的新度量。新的正定度规,称为绝对度规,可以与原来的洛伦兹度规协变相关。对于二维原始度量的特殊情况,绝对度量可以作为曲面嵌入三维欧几里得空间中。

英文摘要:

I present a way to visualize the concept of curved spacetime. The result is a curved surface with local coordinate systems (Minkowski Systems) living on it, giving the local directions of space and time. Relative to these systems, special relativity holds. The method can be used to visualize gravitational time dilation, the horizon of black holes, and cosmological models. The idea underlying the illustrations is first to specify a field of timelike four-velocities. Then, at every point, one performs a coordinate transformation to a local Minkowski system comoving with the given four-velocity. In the local system, the sign of the spatial part of the metric is flipped to create a new metric of Euclidean signature. The new positive definite metric, called the absolute metric, can be covariantly related to the original Lorentzian metric. For the special case of a 2-dimensional original metric, the absolute metric may be embedded in 3-dimensional Euclidean space as a curved surface.

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。

↑