An IBM cryostat wired for a 50 qubit system. Credit: IBM

IBM has announced a milestone in its race against Google and other big tech firms to build a powerful quantum computer. Dario Gil, who leads IBM’s quantum computing and artificial intelligence research division, said it’s scientists have successfully built and measured a processor prototype with 50 qubits. Gil says it’s the first time any company has built a quantum computer at this scale.

This new processor expands upon the 20 qubit architecture and will be made available in the next generation IBM Q systems. Clients will have online access to the computing power of the first IBM Q systems by the end of 2017, with a series of planned upgrades during 2018...

(Photo by Elle Starkman) PPPL physicist Will Fox

Lasers that generate plasma can provide insight into bursts of subatomic particles that occur in deep space, scientists have found. Such findings could help scientists understand cosmic rays, solar flares and solar eruptions – emissions from the sun that can disrupt cell phone service and knock out power grids on Earth.

Physicists have long observed that particles like electrons and atomic nuclei can accelerate to extremely high speeds in space. Researchers believe that processes associated with plasma, the hot fourth state of matter in which electrons have separated from atomic nuclei, might be responsible...

Redox-sensitive alteration of replisome architecture safeguards genome integrity. Science, 2017; 358 (6364): 797 DOI: 10.1126/science.aao3172

New DNA is generated in human cells from nucleotides produced by an enzyme RNR. Until now, we have not fully understood how exactly the RNR rhythm and the presence of right amount of nucleotides are aligned with the pace of DNA replication. Now, researchers from the Faculty of Health and Medical Sciences at the University of Copenhagen have mapped the flow and regulation of nucleotides. The flow follows the same rhythm as replication of DNA does – and when it does not, the cells regulate the process to align the two.

“We can see that these processes follow the same periodic rhythm...

A photograph shows regenerated helical silk fibers colored by Rhodamine dyes, under UV light. Credit: Courtesy of the researchers

Reconstituted silk can be several times stronger than the natural fiber and made in different forms. When it comes to concocting the complex mix of molecules that makes up fibers of natural silk, nature beats human engineering hands down. Despite efforts to synthesize the material, artificial varieties still cannot match the natural fiber’s strength. But by starting with silk produced by silkworms, breaking it down chemically, and then reassembling it, engineers have found they can make a material that is more than twice as stiff as its natural counterpart and can be shaped into complex structures such as meshes and lattices...