Boffins hail quantum computing breakthrough

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Boffins hail quantum computing breakthrough

NETHERLANDS - Delft University of Technology carries out calculations with quantum bits.

Scientists have come a step closer to developing a workable quantum computer by demonstrating that it is possible to carry out calculations with two quantum bits.

Researchers at Delft University of Technology will report their breakthrough in this week's issue of Nature.

A quantum computer will be based on the properties of quantum physics. It hinges on the fact that a quantum bit, or qubit, exists in two states at the same time.

The information from two qubits is entangled in a way that has no equivalent in the normal world.

"It is highly likely that workable quantum computers will need to be produced using existing manufacturing techniques from the chip industry," the researchers stated.

"Working on this basis, the scientists at Delft are currently studying two types of qubits, one making use of tiny superconducting rings and the other making use of 'quantum dots'.

"Now for the first time a 'controlled-NOT' calculation with two qubits has been realised with the superconducting rings. This is important because it allows any given quantum calculation to be realised."

The results were achieved by PhD student Jelle Plantenberg in the team led by Kees Harmans and Hans Mooij.
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