Whereas conventional computers can perform tasks extremely quickly already, their circuits abide by the laws of classical physics, meaning they can only be in a single state at any given time. Regular desktop and laptop computers use codes, or bits, expressed as either a 0 or a 1.
Quantum computers, however, are not governed by the same limitations. A quantum bit, or qubit, can exist as a 0, 1, or both a 0 and 1 simultaneously, which is a strange state known as superposition.
"But quantum computing is not just a faster type of conventional computing. It's for specific problems — it's not just taking the computers we have today and making them a billion times faster," said Scott Aaronson, an associate professor in the Computer Science and Artificial Intelligence Laboratory at MIT.
Google and NASA get behind future for QUANTUM COMPUTING - http://www.livescience.com/34498-google-quantum-computer-benefits.html
PS - You have no idea how comforting is the introduction into reality a fundamental concept of my "double paradox" - (see BOLD)