Quantum computing is being hailed as the future of data processing, with promises of performing calculations thousands of times faster than modern supercomputers while consuming magnitudes less electricity. And in the span of just two years the only commercially available quantum computer, the D-Wave One, has already doubled its computational power. Kiss your law goodbye, Mr. Moore.

Quantum computing differs from classical computing at its most fundamental level. While traditional computers rely on the alternate bit states of 1 and 0 to store data, quantum computers exploit the fuzzy effects of quantum mechanics, allowing its "qubits" to exist as a 1, 0, or both simultaneously, a.k.a "superposition." So while a traditional computer will sequentially explore the potential solutions to a mathematical optimization problem, the quantum system looks at every potential solution simultaneously, known as quantum annealing, and returns answers—not just the single "best" but nearly 10,000 close alternatives as well—in roughly a second. What's more, unlike traditional computers which rely on logic gates to manipulate bits, the D-Wave system uses an adiabatic, which reads out the ground state of its qubits to find a solution.

*The 128-qubit array of the DW1*

When the original D-Wave One (DW1) debuted in May, 2011, it utilized a 128 qubit chip-set, magnitudes faster than existing supercomputer technology, and was immediately purchased by research labs and defense contractors such as Lockheed, which installed one at USC in LA. However the recently released D-Wave Two (DW2), blows its predecessor out of the water using a massive 512 qubit array.

Each qubit is a small, superconducting processor that exploits quantum mechanical effects. These effects are magnified the more qubits that are connected to one another. Were every one of the 509 functional qubits in the D-Wave Two hooked up to one another, the system would wield processing powers 100 orders of magnitude more powerful its predecessor. However, since each DW2 qubit only communicates directly seven other qubits in tightly packed blocks or nodes—these nodes are then connected to other 8-qubit nodes in the lattice—the DW2 is only about *300,000 times* more powerful than the D-Wave One. So, you know, just a modest spec bump.

Heck, even when the DW2 is only using 439 qubits, as it did when D-Wave Systems consultant, Catherine McGeoch, tested it against state of the art workstations running top of the line CPLEX optimization algorithms, the DW2 produced results 3,600 times faster—providing 100 solutions in a half second. The workstations required a half hour to produce the same.

## DISCUSSION

And goodbye privacy (like we had any left). One of the principle applications of quantum computers is cracking the public-key encryption we all use every day on the internet. Those systems are based on the computational difficulty of finding the prime factors of very large numbers. A conventional computer would take ages; a quantum computer could do it in a trice. Once they get these things revved up to their full potential all bets are off.