As I understand it, quantum theory consists of two parts.

... the 2nd part is

Born's rule and using it

one can follow the 'shut up and calculate' approach which is so

successful. On the other hand, trying to really understand or

even derive it can be quite confusing and I admit that I am confused [*].

But in my case, this is just one of several issues in physics which I

do not understand. To be honest, I already have a problem to explain

what exactly 'probability' is supposed to mean. And why do we use

it most often when considering the future but not the past?

I feel like

Augustinus and if I wish to explain, I recognize that I do not know.

Whenever I considered myself to be a physicist, I suffered from the suspicion of being a fraud. Like most physicists I used (and abused) various mathematical

concepts, but quite often I really had

no clue

what I was doing.

But it seems that I am perhaps

not the only one [x] with this problem...

Later, I found a solution to my doubts - I simply do not consider

myself to be a real physicist any longer.

At least I can feel free now to ask stupid questions and make silly proposals...

This is why this blog exists. Again.

As some readers know there is that chance that I may delete it as soon

as the feeling of being a fraud creeps up again. What is the probability of

that? A good question, which I may be able to answer as soon as you help me

figure out what probability means .-)

If you found this first blog post by chance and want to get a better idea in advance what this blog will be about, I suggest you

take a look

at this page.

Welcome to

*the statistical mechanic* and let's hope it will be an interesting journey.

PS: Perhaps you noticed that this text was somehow written in reverse order.

It is not that I try to be confusing on purpose - but often it just comes out that way...

[*] A good starting point is

this paper by Zurek and I also recommend

these comments.

Notice that the comments appeared earlier than the original paper on the arxiv 8-)

And there is

a video of a lecture by Sidney Coleman on quantum theory, which I recommend. (If you want to jump to his treatment of the 'measurement problem' move to min. 38 and probability is discussed at min. 55)

[x] I should clarify that in my opinion the interesting part of the Bogdanov Affair is not played by the two brothers, but the community of professional physicists. E.g. consider this statement of Roman Jackiw: "It showed some originality and some familiarity with the jargon. That's all I ask."