HPC
发表文章数: 244
武功等级: 逍遥拳
(第七重)
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ON Cosmological principle
As a young man, no position and no money, but passion and creation.
In the enviroment of current accademic research, fashion is beyond everything.
when you consider some fundamental problems or big issues, you have no cooperators, which makes the progress slow.
Long ago I think cosmological principle may have some bugs in it. Recent researches seems to show this kind of possibility.
Faith, Fashion and Fancy.
Welcome to 我的域名：http://hongbaozhang.blog.edu.cn
| 发表时间：2005-07-12, 09:41:42 |
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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: ON Cosmological principle
what is the bug in cosmological principle?
| 发表时间：2005-07-12, 14:36:45 |
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HPC
发表文章数: 244
武功等级: 逍遥拳
(第七重)
内力值: 206/206
Re: ON Cosmological principle
How to average the spacetime to get the homogeneous and isotropic cosmology.
This idea may be initiated by G. Ellis. Recent trends in cosmology is try to understand this average and the real inhomogeneous world, which may explain away dark matter and dark energy. I prefer this kind of viewpoint.
If you are interested in this idea. please refer to Kolb's recent paper by slac spires:)
Faith, Fashion and Fancy.
Welcome to 我的域名：http://hongbaozhang.blog.edu.cn
| 发表时间：2005-07-12, 21:19:09 |
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kanex
发表文章数: 860
武功等级: 弹指神通
(第六重)
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Re: ON Cosmological principle
提一下小弟的看法。解决cosmological principle的三种可能。
1. 人择。题外话：不幸的消息，在string2005上，panel中投票赞成和反对人择的人数为4:4。
2. 在我们的定律（全部都是local的。）之外，存在约束整个宇宙整体的定律/边界条件。另外拓扑方面的东西现在还是比较热门。
3. 它是一种演化的必然。我们希望合理的模型+计算机模拟可以揭示这一点。
江畔何人初见月`江月何年初照人`
| 发表时间：2005-08-03, 14:58:08 |
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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: ON Cosmological principle
>1. 人择。题外话：不幸的消息，在string2005上，panel中投票赞成和反对人择的人数为4:4。
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well, it is 5:1 against antropic principle in the audience. however, this is physics. opinion poll means nothing.
a historical note, about 30 years ago, Susskind gave a talk at SLAC on QCD. in the end, he polled th audience, about 90% does not believe QCD.
2. 在我们的定律（全部都是local的。）之外，存在约束整个宇宙整体的定律/边界条件。另外拓扑方面的东西现在还是比较热门。
3. 它是一种演化的必然。我们希望合理的模型+计算机模拟可以揭示这一点。
| 发表时间：2005-08-03, 21:35:56 |
作者资料
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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: ON Cosmological principle
>Recent trends in cosmology is try to understand this average and the real inhomogeneous >world, which may explain away dark matter and dark energy. I prefer this kind of viewpoint.
>If you are interested in this idea. please refer to Kolb's recent paper by slac spires:)
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by the way, that paper by Kolb is wrong. they applied perturbation theory n a regime where it is not valid.
| 发表时间：2005-08-03, 21:43:11 |
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