The source with a link to the original article in Nature.
Below is an schematic of a NOT gate (inverter) built using 1 transistor
The source is this blog post.
Click on the images below to get to the Wikipedia article.
An explanation of various polarization types with formulas.
It is a Wiki for quantum computation.
QInf is Maxima-based collection of quantum computaction utilities.
Maxima is a free, comprehensive, open-source Computer Algebra System, capable of many relevent operations already, such as linear algebra and tensor calculations. Altoghether, QInf/Maxima form a complete system for quantum computing.
jQuantum is a Java application which allows one to assemble and test quantum circuits. It contains a number of pre-built gates, including Quantum Fourier Transform and Grover gate. It comes with a number of ready-to-use examples which can be loaded and immediately simulated.