quantum bits

10/15/2012 - 12:16

In the far future, superconducting quantum bits might serve as components of high-performance computers. Today already do they help better understand the structure of solids, as is reported by researchers of Karlsruhe Institute of Technology in the Science magazine. By means of Josephson junctions, they measured the oscillations of individual atoms “tunneling” be-tween two positions. This means that the atoms oscillated quantum mechanically. Deformation of the specimen even changed the frequency.

04/25/2012 - 12:43

Physicists at the National Institute of Standards and Technology (NIST) have built a quantum simulator that can engineer interactions among hundreds of quantum bits (qubits)—10 times more than previous devices. As described in the April 26 issue of Nature, the simulator has passed a series of important benchmarking tests and scientists are poised to study problems in material science that are impossible to model on conventional computers.

04/20/2012 - 11:10

The Garching-based physicists are now the first to transmit quantum bits in the form of individual photons from one atom to the other via a 60-metre fibre-optic cable and to reliably store them in the receiver atom. This arrangement is not only suitable for exchanging data between computers, should they, in years to come, compute in quantum bits. It also enables fundamental insight into how quantum communication works, and it could, in future, allow physicists to investigate quantum systems that are not yet understood.