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Quantum Information course of the University of Oxford Hilary 2023 1 1 a by 
Ciro Santilli 37 Created 2025-06-17 Updated 2025-07-16
Ciro Santilli 37 Created 2025-06-17 Updated 2025-07-16 Quantum Information course of the University of Oxford Hilary 2023 1 1 by Ciro Santilli 37 Created 2025-06-17 Updated 2025-07-16
Ciro Santilli 37 Created 2025-06-17 Updated 2025-07-16 Quantum Information course of the University of Oxford Hilary 2023 1 by Ciro Santilli 37 Created 2025-06-17 Updated 2025-07-16
Ciro Santilli 37 Created 2025-06-17 Updated 2025-07-16 Quantum Information course of the University of Oxford Hilary 2023 Problem sheet by Ciro Santilli 37 Created 2025-06-17 Updated 2025-07-16
Ciro Santilli 37 Created 2025-06-17 Updated 2025-07-16As beautifully put in The Eighth Day of Creation:
For more than a hundred years, the Cavendish Professorship has been the chair of experimental physics in the University of Cambridge. The man in that chair rules the university's research in physics. Indeed, for most of that hundred years the Cavendish Professor was preeminent in British science, with an authority that made him, as it were, the archbishop of physics
Professorship of the university of Cambridge by Ciro Santilli 37 Created 2025-06-17 Updated 2025-07-16
Ciro Santilli 37 Created 2025-06-17 Updated 2025-07-16This is a quick Microarchitectural benchmark to try and determine how many functional units our CPU has that can do an
inc instruction at the same time due to superscalar architecture.The generated programs do loops like:with different numbers of inc instructions.
loop:
inc %[i0];
inc %[i1];
inc %[i2];
...
inc %[i_n];
cmp %[max], %[i0];
jb loop;
c/inc_loop_asm_n.sh results for a few CPUs
. Quite clearly:and both have low instruction count effects that destroy performance, AMD at 3 and Intel at 3 and 5. TODO it would be cool to understand those better.
- AMD 7840U can run INC on 4 functional units
- Intel i7-7820HQ can run INC on 2 functional units
Data from multiple CPUs manually collated and plotted manually with ../c/inc_loop_asm_n_manual.sh.
Pinned article: Introduction to the OurBigBook Project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Intro to OurBigBook
. Source. We have two killer features:
- topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculusArticles of different users are sorted by upvote within each article page. This feature is a bit like:
- a Wikipedia where each user can have their own version of each article
- a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.
Figure 3. Visual Studio Code extension installation.
Figure 5. . You can also edit articles on the Web editor without installing anything locally. Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension. 
- Infinitely deep tables of contents:
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact