Oxford Nanopore Technologies product Updated +Created
Pair production Updated +Created
Position operator Updated +Created
This operator case is surprisingly not necessarily mathematically trivial to describe formally because you often end up getting into the Dirac delta functions/continuous spectrum: as mentioned at: mathematical formulation of quantum mechanics
QEMU JavaScript port Updated +Created
This is especially interesting for user mode emulation.
Qiskit component Updated +Created
Qiskit example Updated +Created
Rayleigh-Jeans law Updated +Created
Derived from classical first principles, matches Planck's law for low frequencies, but diverges at higher frequencies.
Solar System Updated +Created
Electron degeneracy pressure Updated +Created
HHL algorithm Updated +Created
Intel quantum computer Updated +Created
Video 1.
Architecture All Access: Quantum Computing by James Clarke (2021)
Source.
Iterative pre-order Updated +Created
This is the easiest one to do iteratively:
  • pop and visit
  • push right to stack
  • push left to stack
Lamb shift Updated +Created
2s/2p energy split in the hydrogen emission spectrum, not predicted by the Dirac equation, but explained by quantum electrodynamics, which is one of the first great triumphs of that theory.
Note that for atoms with multiple electrons, 2s/2p shifts are expected: Why does 2s have less energy than 1s if they have the same principal quantum number?. The surprise was observing that on hydrogen which only has one electron.
On the return from the train from the Shelter Island Conference in New York, Hans Bethe managed to do a non-relativistic calculation of the Lamb shift. He then published as The Electromagnetic Shift of Energy Levels by Hans Bethe (1947) which is still paywalled as of 2021, fuck me: journals.aps.org/pr/abstract/10.1103/PhysRev.72.339 by Physical Review.
The Electromagnetic Shift of Energy Levels Freeman Dyson (1948) published on Physical Review is apparently a relativistic analysis of the same: journals.aps.org/pr/abstract/10.1103/PhysRev.73.617 also paywalled as of 2021.
TODO how do the infinities show up, and how did people solve them?
Video 1.
Lamb shift by Dr. Nissar Ahmad (2020)
Source. Whiteboard Lecture about the phenomena, includes description of the experiment. Seems quite good.
Video 2.
Murray Gell-Mann - The race to calculate the relativistic Lamb shift by Web of Stories (1997)
Source. Quick historical overview. Mentions that Richard Feynman and Julian Schwinger were using mass renormalization and cancellation if infinities. He says that French and Weisskopf actually managed to do the correct calculations first with a less elegant method.
www.mdpi.com/2624-8174/2/2/8/pdf History and Some Aspects of the Lamb Shift by G. Jordan Maclay (2019)
Video 3. Source.
Mentions that he moved to the USA from the United Kingdom specifically because great experiments were being carried at Columbia University, which is where the Lamb-Retherford experiment was done, and that Isidor Isaac Rabi was the head at the time.
He then explains mass renormalization briefly: instead of calculating from scratch, you just compare the raw electron to the bound electron and take the difference. Both of those have infinities in them, but the difference between them cancels out those infinities.
Video 4.
Hans Bethe - The Lamb shift (1996)
Source.
Ahh, Hans is so old in that video, it is sad to see. He did live a lot tough. Mentions that the shift is of about 1000 MHz.
Video 5.
Lamb shift by Vidya-mitra (2018)
Source.
Myers-Briggs Type_Indicator Updated +Created
Python typing Updated +Created
Quantum particles take all possible paths Updated +Created
As mentioned at: physics.stackexchange.com/questions/212726/a-quantum-particle-moving-from-a-to-b-will-take-every-possible-path-from-a-to-b/212790#212790, classical gravity waves for example also "take all possible paths". This is just what waves look like they are doing.
Quantum Theory of Radiation by Fermi (1932) Updated +Created
Slater determinant Updated +Created

There are unlisted articles, also show them or only show them.