quantum computers tagged posts

A recipe for creating a microscopic crystal structure that can hold 2 wavelengths of light at once is a step toward faster telecommunications and quantum computers. Five years ago, Stanford postdoctoral scholar Momchil Minkov encountered a puzzle that he was impatient to solve. At the heart of his field of nonlinear optics are devices that change light from one color to another – a process important for many technologies within telecommunications, computing and laser-based equipment and science...

Formation of the layered conductive magnet CrCl2(pyrazine)2 through redox-active coordination chemistry. Nature Chemistry, 2018; DOI: 10.1038/s41557-018-0107-7

An international team led by Assistant Professor Kasper Steen Pedersen, DTU Chemistry, has synthesized a novel nano material with electrical and magnetic properties making it suitable for future quantum computers and other applications in electronics.

Chromium-Chloride-Pyrazine (chemical formula CrCl2(pyrazine)2) is a layered material, which is a precursor for a so-called 2D material. In principle, a 2D material has a thickness of just a single molecule and this often leads to properties very different from those of the same material in a normal 3D version. Not least will the electrical properties differ...

The aluminum plates were attached to the topological insulator using platinum. The picture (scale bar: 200?nm) shows one of the devices used in the experiment. Because of the stress, induced by various cool downs, a clear buckling feature appears in the nanogap of the device. This modification is causing the characteristics of the superconducting pairs of electron to vary in different directions, a signature of unconventional superconductivity. Credit: Thilo Bauch and Floriana Lombardi/Chalmers University of Technology

They have probably succeeded in creating a topological superconductor. With their insensitivity to decoherence what are known as Majorana particles could become stable building blocks of a quantum computer...

Artist’s impression of the architecture of a silicon CMOS chip for a spin-based quantum computer; above is mostly standard CMOS components, and below the quantum bits in operation. (Illustration: Tony Melov)

A reimagining of today’s computer chips by Australian and Dutch engineers shows how a quantum computer can be manufactured – using mostly standard silicon technology. Research teams all over the world are exploring different ways to design a working computing chip that can integrate quantum interactions. Now, UNSW engineers believe they have cracked the problem, reimagining the silicon microprocessors we know to create a complete design for a quantum computer chip that can be manufactured using mostly standard industry processes and components.

The new chip design, published in the jou...