BIG WIN QUANTUM ERROR AFTER ALL FULL

But the Methods section outlines what it takes to create something like this. We’ll admit, the science in the paper is pretty dense. Too large, and capacitive coupling between dots makes the system unstable. If they are too small, the energy levels are overwhelmed by phosphorous donors. The dots are made with a scanning tunneling microscope and there is a Goldilocks effect regarding the size of the dots. The team plans to build a 20 dot circuit that would allow for unique simulations not feasible with classic computing tech.

Currently, the 10 dot model is right at the limit of what a conventional computer can simulate reasonably. Creating such a model for simple systems has been feasible, but for a “many body” problem, conventional computing just isn’t up to the task. At least, that’s what the paper says and we have to believe it. The SSH (Su-Schreffer-Heeger) model describes a single electron moving along a one-dimensional lattice with staggered tunnel couplings. By building a model using quantum techniques on the same scale and with the same topology as the molecule in question, simulation is simplified. The interaction of particles inside, for example, a crystalline structure is difficult to simulate using conventional methods.

Simulating molecules is important in the study of exotic matter phases, such as superconductivity. This allowed researchers to model the actual molecule. What’s new about this is that the dots are precisely arranged to simulate an organic compound, polyacetylene.

BIG WIN QUANTUM ERROR AFTER ALL FULL

The paper appears in Nature and you can download the full paper from there. Metal gates control the flow of electrons. The circuits use up to 10 carbon-based quantum dots on a silicon substrate. Researchers at the University of New South Wales and a startup company, Silicon Quantum Computing, published results of their quantum dot experiments.

Big win quantum error after all