Welcome to "From Bohr to Quantum Tech"

Wednesday March 24

New section: Reading List: Quantum Computing and Cryptography Added

Tuesday March 23

Section Q Computing Threads added.

Monday March 22

Section Comment on Quantum Cryptography has been added.

Saturday March 6

Section "Videos" added

Section "Tidbits and Factoids" added

Tuesday March 2

Anthony J. Legget video added to the Quantum Theory and Foundations section. Click Here

Monday March 1

I've added a new section under Quantum Entanglement. It is an extended passage from Tim Maudlin's book "Quantum Nonlocality and Relativity." Click here to go to the new section

And I've added the handouts for lecture two, as well as link to the full lecture, both of which can be seen here.

Sunday Feb 28

Special announcement: After the first lecture, I strongly feel I should not keep the status quo and just follow the planned schedule of lectures. Rather I am altering the course organization, as I want to get quickly to the more concrete aspects of quantum as related especially to quantum cryptography. Therefore, I am "shifting forwards" in the lectures: in lecture two on March 2 we will jump immediately to "Einstein-Podolsky-Rosen" and Schrodinger's Cat. (As opposed to Bohr's Como lecture and the fifth Solvay conference, previously planned for week 2). Having covered "EPR" we will then be in a position to go on to "Second Quantum Revolution" and new technology, in week 3. Weeks four and five I will use for the computing with a brief discussion of q computing, as well as a return to good old Bohr Como lecture and Fifth Solvay.

Thursday Feb 25 

Please note a new article available to read.

Find an essay entitled "Background Issues of Science" 

This essay is of particular relevance to the Fifth Solvay and the general background of quantum foundations.

Monday Feb 22 Remarks Here:


Please note that we have a new section here, in the second tab entitled "Lectures and Supplementals."

Yours completely,


Introductory Greeting Here (posted Feb 5):

A billion thanks for taking this class and I'm glad you're on board.

We have a "dry run" session Tuesday Feb 16th 10:30 AM to 11:45 AM. At this time, we will test the waters and kick the tires of ZOOM, making sure everything works as it ought to work.

First regular class session if Tuesday Feb 23rd 10:30 to 11:45 AM and continues for 5 weeks until the final session on Tuesday March 23rd.

My email is jsbell.ontarget@gmail.com

Here's a word or two here about the topic of the class. 

We're talking about quantum mechanics and what might be called the second quantum revolution. Quantum mechanics got its start when physicists in the 1800's noticed that heated objects were radiating amounts of light that did not quite concur with what might be expected if the atomic constituents were obediently following good old Newtonian Mechanics, like everything else at that time was seen to do. The planets all did so, and even double stars were seen to do so - Sir Isaac Newton's powerful theory of 1687 seemed to tell us about objects falling to the Earth, as well as celestial bodies like stars and planets moving through the universe. So why not atoms too?

Beginning with Max Planck in 1900, physicists began chipping away at the strange behavior of the smallest constituents of matter as well as getting a better and better grip on the properties of light. The culmination came in 1927, with Werner Heisenberg, Niels Bohr, Erwin Schrodinger and some others developing a set of mathematical rules that seemed to offer at least a preliminary understanding.

But matters went much further, with Einstein and Schrodinger continuing research into the basic structure of the theory, including the 1935 discovery by Einstein Podolsky and Rosen of quantum entanglement.

Entanglement was not given much attention by the community of physicists in those days, but in 1952 and 1964, David Bohm and John Stewart Bell respectively arrived at spectacular new results that really helped the "second quantum revolution" take flight.

Quantum entanglement is now poised to carry us all to revolutionary and powerful new technologies such as quantum cryptography and quantum computing.

We will cover in this course a little quantum history from the age of Einstein and Bohr to John S Bell, as well as a look into the world of quantum cryptography. We will  very briefly touch on the coming quantum computer revolution, as well.