Quantum computing tagged posts

Illustration of the quantum entanglement achieved between the two clouds of atoms starting from a single Bose-Einstein condensate. Credit: Iagoba Apellaniz. UPV/EHU

Scientists have achieved, in an experiment, quantum entanglement between 2 Bose-Einstein condensates, spatially separated from each other. Quantum entanglement was discovered by Schrödinger and later studied by Einstein and other scientists in the last century. The groups of entangled particles lose their individuality and behave as a single entity. Any change in one of the particles leads to an immediate response in the other, even if they are spatially separated...

A schematic of an interpocket paired state, one of two topological superconducting states proposed in the latest work from the lab of Eun-Ah Kim, associate professor of physics at Cornell University. The material used is a monolayer transition metal dichalcogenide. Credit: Eun-Ah Kim, Cornell University

The experimental realization of ultrathin graphene – which earned two scientists from Cambridge the Nobel Prize in physics in 2010 – has ushered in a new age in materials research. What started with graphene has evolved to include numerous related single-atom-thick materials, which have unusual properties due to their ultra-thinness...

A holmium (Ho) and a iron (Fe) atom placed on a MgO substrate are the components for the world’s smallest memory device. Ho is used as a storage medium and Fe as a sensor were. The magnetism of the holmium atom can be changed or read by flowing current through the STM tip.

Storing 1 bit in 1 atom is possible: The extraordinary end of Moore’s law. One bit of digital information can now be successfully stored in an individual atom, according to a study just published in Nature. Current commercially-available magnetic memory devices require approximately 1 million atoms to do the same...

Regime of a single 1D wire subband filled. Credit: Dr Maria Moreno

Researchers have observed quantum effects in electrons by squeezing them into one-dimensional ‘quantum wires’ and observing the interactions between them. The results could be used to aid in the development of quantum technologies, including quantum computing. Squeezing electrons into a one-dimensional ‘quantum wire’ amplifies their quantum nature to the point that it can be seen, by measuring at what energy and wavelength (or momentum) electrons can be injected into the wire.

“…for electrons in a quantum wire – they repel each other and cannot get past, so if one electron enters or leaves, it excites a compressive wave like the people in the train,” trying to leave a carriage, said Maria Moreno, also from the Cavendish Lab...