BERLIN: Researchers at Google say they have achieved 'quantum supremacy', in which a computer harnessing the properties of sub-atomic particles did a far better job of solving a problem than the world's most powerful supercomputer.
Quantum computing makes use of a property of sub-atomic particles in which they can simultaneously exist in different states. A quantum bit, or qubit, can thus be both one and zero at the same time. In the jargon, this is called superposition.Another property of sub-atomic particles is for them to become 'entangled' - meaning that they can influence each other's behaviour in an observable way.
The qubits need to be cooled to just above absolute zero to reduce 'noise' - or vibration - that introduces errors into the calculations made by a quantum computer.
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