Quantum Computing Explained with a Deck of Cards
At the MIT Venture Capital and Innovation Conference in Feb. 2017, Dr. Dario Gil, VP of IBM Research, presented a simple overview of quantum computing and what kinds of problems it may be useful to solve. The key is that a quantum computer with N coupled quantum bits (qubits) has equivalent computing power to a classical computer with 2N parallel bits. For a quantum computer with large N (which does not yet exist), this exponential speedup could address a range of computational problems that are currently unsolvable, including decryption, quantum chemistry, and combinatorial optimization. Dr. Gil also presented recent IBM research on development of quantum hardware and software.
For further information on the MIT VC Conference, see here.