Recent content by Bob Walance

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.

I don't want to create and destroy the instance for each periodic timer interrupt. While this would probably work, it seems messy. A pointer to the instance could be created in timer_functions.cpp, but how would it get passed to the timer interrupt?

I have created an object for the class Timers in timer_functions.cpp, and I need to run a method associated with that object ( test_method() ) from interrupts.cpp. I've tried many things but have been unsuccessful. Any ideas would be appreciated. Here is some sample code: classes.hpp...

I have updated the PDF (now rev 4) with a few clarifications and corrections. Also, a table of contents has been added.

In the 'Many Worlds' interpretation of quantum physics, both entangled particles will exist in separate worlds when a measurement is performed. For example, in the case of a simple Bell pair where the wave function has 50% probability of finding the two particles with spin up and 50% probability...

Today I learned that it was Pythagoras' mother who was the first person ever to use the expression, "Do the math!"

I find that The Shaggs' music is especially refreshing.