Frontier Physics - Quantum computing

D-Wave, the small company that sells the world’s only commercial quantum computer, has just signed up Google, NASA and the non-profit Universities Space Research Association.

The superconducting chip D-Wave Two uses quantum bits (or qubits) rather than normal bits for its processing.  Qubits can simultaneously be in state 1 and 0 at the same time.  With multiple qubits, certain problems (like factorisation of large numbers) can be solved in a fraction of the time taken by a conventional computer.  This has implications for crypotography and could lead to very fast code cracking. 

This Nature article explains more.


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