Down quark Updated 2025-07-16
Up quark Updated 2025-07-16
Noisy intermediate-scale quantum era Updated 2025-07-16
Era of quantum computing before we reach physical errors small enough to do perfect quantum error correction as demonstrated by the quantum threshold theorem.
Quantum LC circuit Updated 2025-07-16
A quantum version of the LC circuit!
TODO are there experiments, or just theoretical?
Ladder operator Updated 2025-07-16
The operators are a natural guess on the lines of "if p and x were integers".
And then we can prove the ladder properties easily.
The commutator appear in the middle of this analysis.
Number of pages circa 2021: 155.
It should also be noted that those notes are still being updated circa 2020 much after original publication. But without Git to track the LaTeX, it is hard to be sure how much. We'll get there one day, one day.
Some quotes self describing the work:
A follow up course in the University of Cambridge seems to be the "Advanced QFT course" (AQFT, Quantum field theory II) by David Skinner: www.damtp.cam.ac.uk/user/dbs26/AQFT.html
Number of pages: 616!
Don't redistribute clause, and final version by Cambridge University Press, alas, so corrections will never be merged back: web.physics.ucsb.edu/~mark/qft.html. But at least he's collecing erratas for the published (and therefore draft) versions there.
The book is top-level organized in spin 0, spin half, and spin 1. Quite ominous, really.
The preface states that one of its pedagogical philosophies is to "Illustration of the basic concepts with the simplest examples.", so maybe there is hope after all.
This book really tries to recall basic things to ensure that the reader will be able to understand the more advanced ones.
Sometimes it goes a little bit overboard, like defining what a function does several times.
But Ciro Santilli really prefers it when authors error on the side of obvious.

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