作者GiantPenis (海屌七號)
看板Physics
標題Re: [問題] 古典與量子 的角度
時間Mon Oct 27 01:37:00 2008
※ 引述《GiantPenis (海屌七號)》之銘言：
: ※ 引述《flyingwave (飛翔的波)》之銘言：
: : 請問下面這種說法正確嗎
: : 古典: 根據之前1000000000次的經驗 從100樓往1樓跳 一定會撞死 所以第1000000001次
: : 也一定會撞死
: : 量力: 第1000000001次 撞死的機率是 99.999999999%
: : 這槎說有錯嗎?
: 量子與古典 物理最大的不同
: 關鍵字：Quantum Fluction
: 請自行google
: 或是參考Wikipedia http://en.wikipedia.org/wiki/Quantum_fluctuation
: 類比拿來寫寫科普還可以，但不見得真的讓你學到真正的觀念～
google一下就有了，這寫得很清楚...
http://universe-review.ca/R03-01-quantumflu.htm
In classical physics (appliable to macroscopic phenomena), empty space-time
is called the vacuum. The classical vacuum is utterly featureless. However,
in quantum mechanics (appliable to microscopic phenomena), the vacuum is a
much more complex entity. It is far from featureless and far from empty.
The quantum vacuum is just one particular state of a quantum field
(corresponding to some particles). It is the quantum mechanical state in
which no field quanta are excited, that is, no particles are present.
Hence, it is the "ground state" of the quantum field, the state of minimum
energy. The picture on the left illustrates the kind of activities going on
in a quantum vacuum. It shows particle pairs appear, lead a brief existence,
and then annihilate one another in accordance with the Uncertainty Principle.
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