Category Technology/Electronics

Device Splits and Recombines Superconducting Electron Pairs

image of  Josephson junction
A Josephson junction can split and recombine Cooper pairs of electrons as they travel through two nanowires.

A device that can separate and recombine pairs of electrons may offer a way to study an unusual form of superconductivity, according to RIKEN physicists. This superconducting state would involve exotic particles, Majorana fermions that could prove useful in developing quantum computers.

In conventional superconductors, electrical current flows with no resistance due to electrons teaming up to make ‘Cooper pairs’. A superconductor touching a normal conductor can sometimes induce superconductivity in that conductor through Cooper pairs from the superconductor penetrating the normal conductor.

Now, Sadashige Matsuo of the RIKEN Center for Emergent Matter Science and collea...

Read More

New Nano-barrier for Composites could Strengthen Spacecraft Payloads

Stress modelling within CFRP and coated components. Credit: Nature Materials (2019). DOI: 10.1038/s41563-019-0565-3

The University of Surrey has developed a robust multi-layed nano-barrier for ultra-lightweight and stable carbon fibre reinforced polymers (CFRPs) that could be used to build high precision instrument structures for future space missions.

CFRP is used in current space missions, but its applications are limited because the material absorbs moisture. This is often released as gas during a mission, causing the material to expand and affect the stability and integrity of the structure. Engineers try to minimise this problem with CFRP by performing long, expensive procedures such as drying, recalibrations and bake-out- all of which may not completely resolve the issue.

...Read More

First Chip-to-Chip Quantum Teleportation harnessing Silicon Photonic Chip Fabrication

A. Chip Schematic. Black lines represent single mode waveguides for the single photons, red and blue pulses represent the photon energy in each path. Yellow bars represent external phase control. B. Teleportation setup. C. Entanglement swapping setup. D. 4-photon GHZ state preparation. Credit: University of Bristol

The development of technologies which can process information based on the laws of quantum physics are predicted to have profound impacts on modern society. For example, quantum computers may hold the key to solving problems that are too complex for today’s most powerful supercomputers, and a quantum internet could ultimately protect the worlds information from malicious attacks...

Read More

Honey, I Shrunk Michelangelo’s David

Different views of the 3D-​printed miniature David (1 mm high) made of pure copper. (Image: Giorgio Ercolano, Exaddon)

Researchers have reproduced Michelangelo’s David as a miniature in metal. Their achievement highlights the potential of a special 3D printing method. There he is, standing upon his pedestal: David by Michelangelo. A world-famous statue that nearly every child can recognise. But this David is just 1 millimeter tall, pedestal included, and is made not of marble like the 5.17-meter original, but of pure copper.

It was created using 3D printing by Giorgio Ercolano from Exaddon, an offshoot of ETH spin-off Cytosurge, together with the team led by ETH Professor Tomaso Zambelli from the Laboratory of Biosensors and Bioelectronics...

Read More