Quantum Computers

Crucial hurdle overcome in quantum computing

The significant advance, by a team at the University of New South Wales (UNSW) in Sydney appears in the international journalNature.

“What we have is a game changer,” said team leader Andrew Dzurak, Scientia Professor and Director of the Australian National Fabrication Facility at UNSW.

“We’ve demonstrated a two-qubit logic gate — the central building block of a quantum computer — and, significantly, done it in silicon. Because we use essentially the same device technology as existing computer chips, we believe it will be much easier to manufacture a full-scale processor chip than for any of the leading designs, which rely on more exotic technologies.

“This makes the building of a quantum computer much more feasible, since it is based on the same manufacturing technology as today’s computer industry,” he added. Continue reading

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Nanostar in 2d semiconductor

What are nanostars in 2-D superconductor supposed to mean?

Physicists from France and Russia have discovered magnetic disturbances in 2D superconductor layer, resembling little oscillating stars. These star-like excitations are caused by a single magnetic atom put into the layer of superconducting material. What they mean is that now the Yu-Shibo-Rusinov chains are proved to exist not only in theory. Moreover, it was found out that in the two-dimensional systems the magnetic disturbances spread on longer distances and seem to be more sustainable — which brings us a step closer towards the long-awaited quantum computers. The results were published inNature Physics this week.

According to one of the study’s co-authors from MIPT, the observed effect looks like magnetic “nanostars in the superconducting universe”; building constellations of them can be used in quantum electronics. Continue reading