Universal wave function, 2
Assuming Bell’s theorem is correct, any hidden variable theory must be non-local.
Here is my guess:
The hidden variable is the wave function of the measuring device, aka the environment, which involves the rest of the universe.
In short, the hidden variable is the wave function of the whole universe.
— Me@2011.11.28
2011.11.28 Monday (c) All rights reserved by ACHK
Encyclopedia Galactica 2
我的百科全書 2
More open alternatives to Wikipedia.
Deletionists rule Wikipedia. Ironically, they’re constrained by print-era thinking. What harm does it do if an online reference has a long tail of articles that are only interesting to a few people, so long as everyone can still find whatever they’re looking for? There is room to do to Wikipedia what Wikipedia did to Britannica.
— Startup Ideas We’d Like to Fund
— Paul Graham
— July 2008
2011.11.28 Monday ACHK
「律己以嚴，待人以寬」我覺得是錯的。有時候，這句說話甚至會近乎害死人。
如果有朋友有無心之失，但是願意立刻改正，我當然會原諒，只要他的錯誤不牽涉人命傷亡。可惜，我發覺有一些所謂的「朋友」，他們所犯的錯誤是明知故犯的，而且變本加厲。如果我「待人以寬」，繼續和他們做朋友的話，我就變相鼓勵他們繼續做壞事。到頭來，不單我自己受害，連我身邊無辜的其他朋友也會遭殃。
（安：很多諺語都有很多問題。而最大的問題是，它們沒有足夠的上文下理，導致平民百姓不知道它們的適用範圍，繼而錯用諺語也不知道。
哲學家羅素有一個觀察，就是近乎任何一句諺語，你都可以找到和它意見完全相反的另一句諺語。）
例如：
1. 知錯能改，善莫大焉。
2. 一失足成千古恨，回頭已是百年身。
（安：但是，如果你為一句諺語提供足夠的上文下理，它就不再是「諺語」，而變成了一篇文章。）
結論是，大部分情況下，諺語要麼空泛，要麼錯誤，要麼空泛而錯誤。
— Me@2011.11.28
2011.11.28 Monday (c) All rights reserved by ACHK
Duality
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Particles are localized bundles of energy and momentum.
A wave, in contrast, is a disturbance spread over space.
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– p.107 Principles of Quantum Mechanics, by R. Shankar
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2008.12.20 Saturday ACHK
the least of all evils = the greatest of all goods
— Me@2010.11.30
If you allow using both positive and negative numbers to represent good and evil, “minimizing evil” is the same as “maximizing good”.
— Me@2011.11.27
2011.11.27 Sunday (c) All rights reserved by ACHK
Physics Town 