Friday, March 8, 2013

Controversial quantum computer aces entanglement tests

Controversial quantum computer aces entanglement tests: D-Wave instead uses adiabatic quantum computing, in which an array of chilled, superconducting niobium loops – the qubits in this system – very quickly find the lowest point in what can be thought of as an energy "landscape" of hills and valleys...

Spedalieri and colleagues applied a mathematical test that determines whether there are any ways for non-entangled qubits to arrange themselves to be compatible with the data. If not, the system must be entangled.

Using this test, they found evidence for entanglement. What's more, it was at a similar stage in the computation to where D-Wave also found evidence for entanglement, based on energy distribution.

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