Thoughts

on the practical and philosophical ideas that shape our world.

Sunday, 21 April 2024

Fast (Fourier) multiplication

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Figure 1: Representing the numbers 12 and 345 as frequency spectra,  transforming them to time signals and multiplying. One consequence of...
Tuesday, 12 March 2024

Visualizing the discrete Fourier transform

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Figure 1: Yearly lunar satellite path (green) In my earlier post, Visualizing von Neumann's elephant , I noted that the elephant drawi...
Thursday, 29 February 2024

Dissecting von Neumann's elephant

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Figure 1: Von Neumann's elephant In my previous post , I quoted John von Neumann : "With four parameters I can fit an elephant, and...
Saturday, 24 February 2024

Visualizing von Neumann's elephant

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Figure 1: This is not an elephant John von Neumann once remarked to fellow physicist Enrico Fermi: [1] "With four parameters I can fit...
Monday, 13 March 2023

The CHSH game

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Figure 1: Playing the CHSH game Consider the following game  (see Figure 1 ): Alice and Bob are in separate rooms with no way to communica...
Tuesday, 21 February 2023

Bell states and measurements

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Figure 1: John Bell The Bell states  (named after physicist John Bell ) are four maximally entangled quantum states of two qubits. This po...
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Andrew Macdonald
I enjoy exploring the world of ideas and constructing useful software. This blog is intended to be a scratchpad for things I've been reading or thinking about. Feel free to add your own thoughts in the comments.
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