Archive | September 2012

Exam week assignments

— mostly an outline of how the week is going to go.

— also, check out Adam’s link on a breakthrough in building qubits into silicon wafers.


See prof do homework

The new assignment for week 4 and a solution to R&P 2.10.  I’d like to know if you think the solution makes sense.

Commercial quantum key distribution

Here is the promised link to a commercial implementation of quantum key distribution.  It comes in a box!  Though apparently, it’s not yet available on Amazon.

Links to current QC research

A few weeks ago Charlie Hamaker sent me an article on new research in quantum optics, in which a group at MIT and Harvard developed a mechanism for managing the flow, photon-by-photon, from a laser.  It’s a big result.  They’re the first to demonstrate strong interactions between individual photons, mediated by a gas of ultra-cold atoms.  It gives you an idea of the state of research on one path to quantum logic gates.  Along these lines, you may also enjoy some of the articles linked on the blog for my quantum mechanics course last semester, for instance, this one.

Updated assignment

Courtesy of Chris Ray comes a short primer / review on complex numbers.  (Thanks, Chris!)  For Friday, read through the PDF file and do the enclosed problems 2.17-2.19, bringing your solutions to class.  There won’t be any reading response questions for Friday.  We’ll push back Friday’s previously assigned reading on cryptography to Monday, and Monday’s reading to next Wednesday.  The assigned problems from R&P for Monday remain the same.

Assignment: Sept. 3 – 10.

Readings, reading response questions, and problems are ready and waiting.

Hello world.

Welcome to Saint Mary’s College of California Physics 140: Quantum Computing, our low-tech outpost on the web.  (Here at Phys140 we like to play against type.)   The syllabus is up and your correspondent is ready to tackle your questions and concerns.  Let’s go learn some physics.*


* (and math and computer science…)