The Race To Make Better Qubits

One of the big challenges in quantum computing is getting qubits to last long enough to do something useful with them. After decades of research, there now appears to be tangible progress. The challenge with any new semiconductor technology is to improve performance by one or more orders of magnitude without discarding a half-century of progress in other areas. Qubits based on silicon quantu... » read more

Uniform Spin Qubit Devices with Tunable Coupling in an All-Silicon 300 mm Integrated Process

Abstract: Larger arrays of electron spin qubits require radical improvements in fabrication and device uniformity. Here we demonstrate excellent qubit device uniformity and tunability from 300K down to mK temperatures. This is achieved, for the first time, by integrating an overlapping polycrystalline silicon-based gate stack in an ‘all-Silicon’ and lithographically flexible 300mm flow. ... » read more

Power/Performance Bits: July 29

Cool Magnets MIT researchers believe that magnets on the outside of the refrigerator may someday be used for cooling. Magnons, which are essentially a collective spin wave or quasi-particle, are also conductors of heat. MIT researchers found that when exposed to a magnetic field gradient, magnons can be driven from one end of a magnet to another, carrying heat with them. “You can p... » read more

Manufacturing Bits: Dec. 10

Space Telescopes The James Webb Space Telescope, the follow-on mission to the Hubble Space Telescope, is a large, infrared-optimized space telescope. Slated for a launch date of 2018, Webb will find the first galaxies that were formed in the early Universe. Webb is a collaboration between NASA, the European Space Agency (ESA) and the Canadian Space Agency (CSA). Webb’s measurements will ... » read more