"QUANTUM: tangled states hold promise"
The intense search for semiconductors that can house quantum states can be traced to the promise they hold for the future of computing. Today, even experimental single-electron transistors can only represent a digital "1" or "0" depending upon whether the charge is present or absent. However, quantum states encode bits into the wave function of the electron � called its "spin" state � thereby enabling a superposition of any number of bits onto a single electron. For instance, as long as the spin of an electron is undisturbed, it can represent a 1, a 0 and any other in-between values simultaneously. When the spin of one electron interacts with that of another, the result can perform parallel computations on all the values represented in their complex waveforms.
Text: http://www.eet.com/article/showArticle.jhtml?articleId=44300013