Although I write a lot about quantum computing, I've not really paid much attention to performing quantum computations with silicon-based qubits. Luckily Stephanie Simmons from Simon Fraser University in Canada helped me catch up. The idea with silicon-based quantum computers is that impurities form the basis of a qubits. If you drop a single phosphorous atom into a silicon crystal, it replaces a
![Back to the future: Silicon may work for quantum computing](https://cdn-ak-scissors.b.st-hatena.com/image/square/7caaa3c753d0d131f0635a325358b7a664c2f412/height=288;version=1;width=512/https%3A%2F%2Fcdn.arstechnica.net%2Fwp-content%2Fuploads%2F2012%2F10%2Fquantum-storage-640x215.jpg)