e***e
发帖数: 3872 | 1 The role of measurement in quantum mechanics is so critical and so
bizarre that you may well be wondering what precisely constitutes a
measurement. Does it have to do with the interaction between a micro-
scopic (quantum) system and a macroscopic (classical) measuring
apparatus (as Bohr insisted), or is it characterized by the leaving of
a permanent "record" (as Heisenberg claimed), or does it involve the
intervention of a conscious "observer" (as Wigner proposed)?
[ David Griffiths, "Introduc | g****d
发帖数: 3461 | 2 To quote J.S. Bell
It would seem that the (quantum) theory is exclusively concerned with '
results of measurement'
and has nothing to say about anything else. When the 'system' in qestion is
the whole world
where is the 'measure' to be found? Inside, rather than outside, presumably
. What excatly
qualifies some subsystems to play this role? Was the world wave function
waiting to jump for
thousands of millions of years until a single-celled living creature
appeared? Or did it have
to wait a
【在 e***e 的大作中提到】
: The role of measurement in quantum mechanics is so critical and so
: bizarre that you may well be wondering what precisely constitutes a
: measurement. Does it have to do with the interaction between a micro-
: scopic (quantum) system and a macroscopic (classical) measuring
: apparatus (as Bohr insisted), or is it characterized by the leaving of
: a permanent "record" (as Heisenberg claimed), or does it involve the
: intervention of a conscious "observer" (as Wigner proposed)?
: [ David Griffiths, "Introduc
| e***e
发帖数: 3872 | 3 Griffiths在第一章里也引到了Bell的实验。:)
跟ciaccona提到看QM，被隐含地嘲笑这个都没学过……
这让我我想起波德莱尔的一句话，曾经被我抄在一本书的扉页里送人：
"Romanticism is found precisely neither in the choice of subjects
nor in exact truth, but in a way of feeling."
－ Charles Baudelaire (1821-1867), “What is Romanticism?” (1846).
btw，你什么时候会开始care一点你post的format呢？lol
is
presumably
【在 g****d 的大作中提到】
: To quote J.S. Bell
: It would seem that the (quantum) theory is exclusively concerned with '
: results of measurement'
: and has nothing to say about anything else. When the 'system' in qestion is
: the whole world
: where is the 'measure' to be found? Inside, rather than outside, presumably
: . What excatly
: qualifies some subsystems to play this role? Was the world wave function
: waiting to jump for
: thousands of millions of years until a single-celled living creature
| g****d
发帖数: 3461 | 4
笑就笑吧。Cicero说
“haec studia adulescentiam alunt, senectutem oblectant, secundas res ornant
, adversis perfugium ac
solatium praebent, delectant domi, non impediunt foris, pernoctant nobiscum,
peregrinantur,
rusticantur”
“These (literary) studies are the food of youth, and consolation of age;
they adorn prosperity, and are
the comfort and refuge of adversity; they are pleasant at home, and are no
incumbrance abroad; they
accompany us at night, in our travels, and in our rural retreats.
这话刻在布朗大学的门口
【在 e***e 的大作中提到】
: Griffiths在第一章里也引到了Bell的实验。:)
: 跟ciaccona提到看QM，被隐含地嘲笑这个都没学过……
: 这让我我想起波德莱尔的一句话，曾经被我抄在一本书的扉页里送人：
: "Romanticism is found precisely neither in the choice of subjects
: nor in exact truth, but in a way of feeling."
: － Charles Baudelaire (1821-1867), “What is Romanticism?” (1846).
: btw，你什么时候会开始care一点你post的format呢？lol
:
: is
: presumably
| O*****a
发帖数: 11621 | 5 that was not my quote.
i quoted a judge from his statement about pornography during a hearing - thanks to my J.D. ex, i went through his notes for exams, now i know lawyer jokes, and i know all my rights. :) |
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