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Paul Dirac's handwritten notes for his PhD, the first ever on quantum mechanics

academia.edu

31–40 of 55 posts

Re: Paul Dirac's handwritten notes for his PhD, the first ever on quantum mechanics

#31
post #16

Wow! This must have been a lot of work to write this all down. We are creating tools for PhD students so they can work more efficiently. bohr.launchrock.com

Please stop spamming HN with advertisements for this. You have posted 9 of these, generally with only the most tenuous relevance to the thread in which you have done so. In one case you appear to have been trying to pretend not to be affiliated with the company in question. Please stop.

Re: Paul Dirac's handwritten notes for his PhD, the first ever on quantum mechanics

#32
post #17

Earlier quoted context omitted.

"Pshaw, even the most dimwitted individual should understand this, provided they have a BS in physics, were accepted to grad school, and are in their first or second year."

Nah, this is undergrad physics these days. 3rd or 4th year undergrad physics admittedly :)

Relativistic quantum mechanics typically isn't covered during undergrad. Maybe touched on briefly.

Re: Paul Dirac's handwritten notes for his PhD, the first ever on quantum mechanics

#33
post #9
post #2

There's nothing like looking at that Table of Contents to put your own PhD in perspective!

Indeed, although some of this is the luck of timing. E.g. Richard Feynman would likely have been one of the great names in quantum mechanics ... if it weren't for the fact he was 8 years old right then. Linus Pauling, born 17 years earlier, became the 20th century's most preeminent chemist in part because he was a fricking genius and writer (many of his books are still useful today), but key was that also in 1926 he…

Wait, Feynman wasn't one of the "great names in quantum mechanics"??

Re: Paul Dirac's handwritten notes for his PhD, the first ever on quantum mechanics

#34

Earlier quoted context omitted.

Indeed, he went to Bristol and Cambridge, whence he developed his relativistic quantum theory. He relocated to Florida towards the end of his life. *edited the part where I assert OP was wrong.

We are splitting hairs here. What is wrong? That his career dawned in Florida?

I'm sorry, I completely misread what you wrote!

Re: Paul Dirac's handwritten notes for his PhD, the first ever on quantum mechanics

#35
post #9
post #2

There's nothing like looking at that Table of Contents to put your own PhD in perspective!

Indeed, although some of this is the luck of timing. E.g. Richard Feynman would likely have been one of the great names in quantum mechanics ... if it weren't for the fact he was 8 years old right then. Linus Pauling, born 17 years earlier, became the 20th century's most preeminent chemist in part because he was a fricking genius and writer (many of his books are still useful today), but key was that also in 1926 he…

One of the interesting things in http://businessinnovation.berkeley.edu/WilliamsonSeminar/jon... is the graphs and comments on quantum mechanics - everyone involved got degrees and did their Nobel-worth work astonishingly young. The 'bag of jewels' metaphor really is apt, because it seems you had only to be young and flexible-minded to do groundbreaking work. There will probably never again be a period of such riches in physics (he said in 2013, more than a century after Planck's quanta).

http://rjlipton.wordpress.com/2013/06/25/it-takes-guts-to-do... also comes to mind as Dirac and quantum mechanics related.

Re: Paul Dirac's handwritten notes for his PhD, the first ever on quantum mechanics

#36
post #9

Earlier quoted context omitted.

Indeed, although some of this is the luck of timing. E.g. Richard Feynman would likely have been one of the great names in quantum mechanics ... if it weren't for the fact he was 8 years old right then. Linus Pauling, born 17 years earlier, became the 20th century's most preeminent chemist in part because he was a fricking genius and writer (many of his books are still useful today), but key was that also in 1926 he…

Wait, Feynman wasn't one of the "great names in quantum mechanics"??

I think the point is that Feynman came later to contribute to Quantum Electrodynamics, the "first theory where full agreement between quantum mechanics and special relativity is achieved."*

* https://en.wikipedia.org/wiki/Quantum_electrodynamics

Re: Paul Dirac's handwritten notes for his PhD, the first ever on quantum mechanics

#37
post #32
post #17

Earlier quoted context omitted.

Nah, this is undergrad physics these days. 3rd or 4th year undergrad physics admittedly :)

Relativistic quantum mechanics typically isn't covered during undergrad. Maybe touched on briefly.

I don't know what university you went to, but it definitely was on my course. Second or third year. The idea that you wouldn't cover relativistic QM in undergrad physics is pretty absurd, and probably indicative of how shallow American undergrad degrees are.

Re: Paul Dirac's handwritten notes for his PhD, the first ever on quantum mechanics

#38
post #32
post #17

Earlier quoted context omitted.

Nah, this is undergrad physics these days. 3rd or 4th year undergrad physics admittedly :)

Relativistic quantum mechanics typically isn't covered during undergrad. Maybe touched on briefly.

Cambridge Physics Part II (third year of the Natural Sciences tripos) includes relativistic QM as a core 3rd year topic.

The Cambridge Physics course is fairly hard core of course, but I would expect such a course to be part of any serious Physics undergraduate degree in the UK.

Re: Paul Dirac's handwritten notes for his PhD, the first ever on quantum mechanics

#39
post #9

Earlier quoted context omitted.

Indeed, although some of this is the luck of timing. E.g. Richard Feynman would likely have been one of the great names in quantum mechanics ... if it weren't for the fact he was 8 years old right then. Linus Pauling, born 17 years earlier, became the 20th century's most preeminent chemist in part because he was a fricking genius and writer (many of his books are still useful today), but key was that also in 1926 he…

Wait, Feynman wasn't one of the "great names in quantum mechanics"??

Feyman was too young for the really fundamental work on quantum mechanics. He won his Nobel prize for his work on quantum electrodynamics. However, he created the path-integral formulation of quantum mechanics, which can be thought of as another way of describing quantum mechanics.

Re: Paul Dirac's handwritten notes for his PhD, the first ever on quantum mechanics

#40
post #39

Earlier quoted context omitted.

Wait, Feynman wasn't one of the "great names in quantum mechanics"??

Feyman was too young for the really fundamental work on quantum mechanics. He won his Nobel prize for his work on quantum electrodynamics. However, he created the path-integral formulation of quantum mechanics, which can be thought of as another way of describing quantum mechanics.

yeah, I was thinking, uh, the path-integral formulation?? Which IIRC is still kind of mathematically ill-defined, but still.

making a fundamental discovery is not necessary to be a 'great mind', I think. As the man himself said, 'what I cannot create, I do not understand'.

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