Recent content by rasp

A long time ago, I was very impressed by a lecture on elementary special relativity which showed in simple math how the correct conclusion to the null results of the Michelson-Morley experiment were obtained by concluding a constant c but then adding a length contraction and time dilation. I...

Lol about the confusing part. I’m glad I share at least that with physicists. I especially like the quote from John Wheeler. https://Rhys.wordpress.com/2006/06/09/quantum-mechanical-quotes/

Thank you. Obviously I Need to learn more. Although I’m fascinated, I’m finding I’m in sufficiently prepared even to grasp the basic concepts.

I am asking a very basic question. Asking for clarification on the procedure for preparing quantum particles in an entangled state. My question asks if once the particles are prepared along a certain axis, is it then true that the intervention is then removed so that each particle can become...

No need to get excited. Andrew is correct Susskind didn’t use SG but used an idealized experiment to describe the probalistic outcomes probably for simplification purposes. However, IMHO, he didn’t provide enough story to correlate the math with the experimental setup.

thanks for your patience I believe I finally got the link. To keep things confused there are 2 different #4 lectures.

Don’t know what’s wrong. Let me try again. It is 1.54 minutes long lecture 4 in the second series on QM. Subtitled entanglements.

this is the link. lecture #4. The question I have is understanding Susskind wording. It is about 13 minutes into the lecture. For example he says, I prepare an electron along the n axis. Then I measure the component of the spin along the m axis. What is the probability if I prepare it along...

thank you Peter. Your answer is most helpful. QM, a fascinating journey I’m just beginning!

Perhaps aligned is a wrong word. What wording should we say when we prepare the electron in a magnetic field and then measure its spin along the same axis of that field? My understanding is that we will find that spin up or down to be either 100% or 0%. I hope I’m correct about that. My most...

Thanks. I think I understand better how the calculation works but how does the many repeatable experiment to find probabilities work? what I’m trying to say is after we have aligned the electron spin along axis n, what do we then do experimentally to measure along axis m?

Thanks. I’m losing this on the concepts, more than the math. I’m thinking that in a 3 dimensional space, there are many axis that are each theta degrees from an existing axis such as to produce a cone. How then do we calculate which one of the many lines to measure? And a second question which...

Susskind explains how if you prepare an electron along any axis n (with an electromagnet) and then measure it along any other axis m, the probability of finding the electron with spin up or spin down is given by the angle between the axis. I have left out the linear algebra, because my question...