Quantum Computing Tutorials

  Computing and computers are bound to the laws of physics , after all the basic parts of computers are bits which are matters . 

To understand how Quantum world works one needs to have in depth knowledge of how digital world works. 

We have a silicon substrate , that is what the transistor made of, And above that we insulating oxide and a metal gate . What we do,  we apply a positive voltage to this top gate here. And that attracts all the electrons that are in the silicon up towards this gate . But they can't get there due to this insulating oxide. So they form two dimensional sheet which forms a conducting channel .Between source and the drain and that makes the transistor ON. That is our “1” of digital information. If we now put a negative voltage on the gate, we repel the electrons down and we push them away from that channel. There is no conducting sheet , and as a consequence you get the “0” of digital information . So that is the “1” and “0” as we go down .For everything that works around us . Everything is coded either a “0” or a “1”  .................................