An Introduction to Quantum Computing

Quantum Computers are being developed with the challenge to take advantage of physics which predicts end of Moores law for the classical computers and quantum tunneling. In a classical computer, there are 4 billion transistors in a single chip available now a day. It is observed by Moores law that number of transistors doubles in every 18 months. So in nearby future, to control the flow of electron with the number of transistor in a single chip, will leads to physical limitation because of quantum physics. Thin transistors have no ability to stop electron flow rather particle wave duality of an electron gives it ability to pass through barrier wall or in other words, electrons appears at either side of a barrier wall. This property of a single electron sometimes called quantum property of the electron. A quantum computer gives exponential speed when adding one more qubit to a system. This makes quantum computers thousand times speedier than combined speed of the super computers in todays world for the specific problems solving. However quantum computers are not an alternate to classical computers but it can be used for a specific purpose like drug discovery, security of a data or air traffic controlling.