timothy from the you-either-have-one-or-you-don't dept.
New submitter peetm writes "Computing company D-Wave has announced they're selling a quantum computing system commercially, which they're calling the D-Wave One. The D-Wave system comes equipped with a 128-qubit processor designed to perform discrete optimization operations. A qubit is the basic unit of quantum information – analogous to a bit in conventional computing. For a broader understanding of how qubits work, check out Ars Technica's excellent guide."
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"