duality
发表文章数: 29
武功等级: 野球拳
(第三重)
内力值: 103/103
A question
Is there anyone know How to define the S-matrix of interaction in a curved spacetime, Whether has this problem been solved very well?
From my personal viewpoint, this is a seriou problem.
| 发表时间：2006-05-29, 21:11:16 |
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sage
发表文章数: 1125
武功等级: 天山六阳掌
(第六重)
内力值: 535/535
Re: A question
It is a big question.
| 发表时间：2006-06-01, 11:38:29 |
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duality
发表文章数: 29
武功等级: 野球拳
(第三重)
内力值: 103/103
Re: A question
It does not matter with that the question is complicated , if you do not mind say anything more about it ,I think you can give me a exact answer , actually,I also read your articles in your personal collections.
Speaking in your ability, I'm sure you can answer it very well.
I only want to know when we are aiming to define it,what will happen ?
| 发表时间：2006-06-01, 22:46:40 |
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sage
发表文章数: 1125
武功等级: 天山六阳掌
(第六重)
内力值: 535/535
Re: A question
I only want to know when we are aiming to define it,what will happen ?
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S-matrix relies on the fact that we could have asymtotic state. In a general background of GR, the notion of asymptotic state is not well defined in general. S-matrix is probably useful because in many physically interesting cases the space time is still asymptotically flat. On the other hand, there are many cases where it is ambiguous to use S-matrix. One probably has to think of some other observables.
| 发表时间：2006-06-02, 00:44:07 |
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kanex
发表文章数: 860
武功等级: 弹指神通
(第六重)
内力值: 343/343
Re: A question
if you have trouble finding observables, wilson loop is always available
Récoltes et semailles
| 发表时间：2006-06-02, 08:24:18 |
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