时间的存在
The existence of time
摘要:
在那些已知等价于广义相对论的引力规范理论中,只有双共形规范引入了新的结构--任何伪欧几里德空间的共形群与其外尔子群的商总是具有自然的辛和度量结构。利用这种度量和辛形式,我们证明了存在正则共轭,正交,度量子流形当且仅当原始规范空间是欧几里德或签名0。在欧几里德情形下,合成的位形空间必须是洛伦兹的。因此,在这种情况下,时间可以被看作是广义相对论的一个派生性质。
英文摘要:
Of those gauge theories of gravity known to be equivalent to general relativity, only the biconformal gauging introduces new structures - the quotient of the conformal group of any pseudo-Euclidean space by its Weyl subgroup always has natural symplectic and metric structures. Using this metric and symplectic form, we show that there exist canonically conjugate, orthogonal, metric submanifolds if and only if the original gauged space is Euclidean or signature 0. In the Euclidean cases, the resultant configuration space must be Lorentzian. Therefore, in this context, time may be viewed as a derived property of general relativity.
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。