TechnologyQuantum computers have finally arrived, but will they ever be useful? Hundreds of quantum computing firms around the world are racing to commercialise these once-exotic devices, but the jury is still out on who is going to pull ahead and produce a machine that actually does something useful 51¶¯Âþ
PhysicsUltracold indium atoms could make unexpected new types of matter For the first time, atoms of the metal indium have been chilled to temperatures a few millionths of a degree above absolute zero, a state where strange quantum phenomena begin to appear 51¶¯Âþ