Recent content by Bob Walance

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.

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!"