評論
打印
I was glad that he did not know the subject of the talk I had just given
我很高興他不知道 我剛給出的主題是
the possibility that the universe had no beginning no moment of creation.
宇宙沒有起點的可能性 沒有開天辟地的那一瞬間
There were theories in the early '70s the first type of creation theories
70年代早期有一些理論 第一種類型的創造論
where the people concerned started off with a fixed, external space and time which for eternity was empty
他們從一個 固定的外部時空出發 這個外部時空永遠都是空的
and then suddenly, for some unknown reason, the universe nucleates at a particular point and then, bang, it blows apart.
然后 突然 因為某種未知的原因 宇宙到某個特定的點成核 砰 它爆炸了
But the trouble is that when space and time appear in the classical theory
但問題是 當時間和空間出現在經典理論中
that actual point itself is a singular point in the mathematics.
那個點本身是個數學上的奇點
Mathematics breaks down, and so you cannot use that to give you a creation theory.
數學無法處理了 所以 你不能用這個來得出創造論
If one goes back in time one comes to the Big Bang singularity where the laws of physics break down.
如果一個人回到從前 回到大爆炸的奇點 那里的物理法則就不復存在
But there's another direction of time that one can go in which avoids the singularity.
但是有另一個時間線的方向 可以順著那個方向來避免奇點
This is called the imaginary direction of time.
這被稱作時間的虛方向
In imaginary time there need not be any singularities which form a beginning or end to time.
在虛時間里 不需要 形成任何時間上有開始或結束的奇點
