HHL algorithm Updated 2025-07-16
Intel quantum computer Updated 2025-07-16
Architecture All Access: Quantum Computing by James Clarke (2021)
Source. Iterative pre-order Updated 2025-07-16
This is the easiest one to do iteratively:
- pop and visit
- push right to stack
- push left to stack
Oxford Nanopore Technologies product Updated 2025-07-16
Pair production Updated 2025-07-16
Position operator Updated 2025-07-16
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
Python
typing Updated 2025-07-16Examples under python/typing_cheat.
Quantum LC circuit Updated 2025-07-16
TODO are there experiments, or just theoretical?
Quantum particles take all possible paths Updated 2025-10-14
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 2025-07-16
Raspberry Pi 3 Updated 2025-07-16
Room temperature and pressure superconductor Updated 2025-07-16
Ruby on Rails React integration Updated 2025-07-16
Integrations React integration:
- github.com/shakacode/react_on_rails: webpack and server-side rendering
- github.com/reactjs/react-rails Official on the React side only. Demo app linked from package: github.com/BookOfGreg/react-rails-example-app and how it fails: github.com/BookOfGreg/react-rails-example-app/issues/30... The related projects section has some good links:
- shakacode/react_on_rails
- github.com/hyperstack-org/hyperstack transpiles Ruby to JavaScript + React. What could possibly go wrong? :-)
Slater determinant Updated 2025-07-16
Cython Updated 2025-07-16
GFP tagging Updated 2025-07-16
How many logical qubits are needed to run Shor's algorithm? Updated 2025-07-16
Lamb shift Updated 2025-07-16
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.
Initial experiment: Lamb-Retherford experiment.
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?
Lamb shift by Dr. Nissar Ahmad (2020)
Source. Whiteboard Lecture about the phenomena, includes description of the experiment. Seems quite good.www.mdpi.com/2624-8174/2/2/8/pdf History and Some Aspects of the Lamb Shift by G. Jordan Maclay (2019)
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.
Hans Bethe - The Lamb shift (1996)
Source. Lamb shift by Vidya-mitra (2018)
Source. Myers-Briggs Type_Indicator Updated 2025-07-16
Protein complex Updated 2025-07-16
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