Recent content by Bob Walance

This is one of the best parts of our wonderful universe.

Yeah, these various historical temperaments were a valiant effort, but they all failed for various reasons and we're stuck with equal temperament - unless everyone's playing violins and theremins. Take a look and listen at: bobwalance dot github dot io The two 'Press for tones' sections will...

My favorite part of Wooly Bully is: "Hatty told Matty, let's don't take no chance. Let's not be L7. Come and learn to dance. Wooly Bully..." The phrase L7 which, if you draw the L closely next to the 7 (with a vertical right side), means square.

The major 7th chord can be very interesting. Musicians including Pink Floyd, Burt Bacharach, and The Carpenters have used it frequently in their tunes. Simple chords are part of nature. Any instrument, including the human voice, creates a major chord with its harmonics (overtones). After doing...

I am working on a Python program that listens to a sound, does a spectral analysis of that sound, can play the individual pure tones that comprise that sound, and finally can identify which musical chord might be present in all of those tones. Here's a screenshot of my trumpet playing a low C...

Minguzzi's paper, in its 'A more complicated example' section, does confirm that all four phases would yield equal elapsed times on Alex's clock. Thank you for posting this. I suppose that I should feel confident about this answer since obtaining confirmation experimentally would be difficult.

Alex and Babs are on the ISS. Babs departs in her spaceship, and her engine always imparts either +1g or -1g on her body until the journey ends. There are four phases to Babs' journey. Each phase lasts for 1 year according to Babs. Phase 1: Babs departs and turns on her engine to its NORMAL...

The PDF is now rev 6. An appendix has been added that gives some details on a classical computer's simulation of a quantum computer.

The IBM simulator is much easier to use. Give it a try and then learn how to entangle two qubits. That'll be a good start. https://quantum.ibm.com/composer/files/new

After you get the new files, the one to run is 'qc_simulator.py'.

I've fixed that problem. Please download the six new .py files, and let me know if you're able to run it. Thanks.

I had written a simulator for a quantum computer and wanted to be able to calculate the values of the "purity of reduced states". "Purity of reduced states" is a quantity that IBM provides on their simulator for each qubit. They used to call it "entanglement", and I believe that the two terms...

An Irishman in a Dublin pub has the habit of ordering three separate pints of Guinness. He would set them down on the table and carefully take a sip from each glass one-by-one. This goes on for many weeks when someone in the pub gets curious and decides to ask the man why he does this. He...

I was reading an obituary page today in the newspaper and noticed that everyone listed in this obituary had died in alphabetical order.

Wow. That works! Yes, a single instance of the class (really it's no instance) is just fine for my application. Thank you for the simple solution.