Off-the-shelf cryo component companies

Quantum Campus shares the latest in quantum science and technology. Read by more than 1,900 researchers, we publish on Fridays and are always looking for news from across the country. Want to see your work featured? Submit your ideas to the editor.

Quantum emitters

Researchers at Argonne National Lab and the University of Illinois created quantum emitters using twisted layers of ultrathin hexagonal boron nitride, increasing the strength of the emitters’ signal by up to 120 times. Using Argonne’s Quantum Emitter Electron Nanomaterial Microscope, the team pinpointed the location of emitters within less than 10 nanometers, according to an announcement from Argonne. They also showed that they could create these quantum emitters on demand by adding carbon and could activate them at chosen spots.

This work was published in Advanced Materials.

Magnetometer

A team at the University of California Santa Barbara and University of Cagliari demonstrated an on-chip magnetometer that operates at room temperature with optical properties that can be tuned using a magnetic field.

“The light weight and low power consumption of this magnetometer make it ideal for use on small satellites,” said UCSB’s Paolo Pintus. It could also be used in “navigation, providing an alternative navigation source in environments where GPS is jammed, spoofed or unavailable such as underwater, in tunnels or during electronic warfare.”

This work was published in Optica.

Off-the-shelf cryo components

IEEE Spectrum provided an extensive rundown of “a burgeoning quantum components industry…springing up to provide off-the-shelf solutions.” The reporter talked to manufacturers of several devices that will operate at cryogenic temperatures, including CMOS transistors, superconducting amplifiers, and cabling solutions.

Read the full story in IEEE Spectrum.

11-qubit processor

Australia-based Silicon Quantum Computing detailed an 11-qubit processor based on phosphorus atoms. It is composed of two multi-nuclear spin registers linked by electron exchange. The team achieved single-qubit and multi-qubit gates with fidelities ranging from 99.10 to 99.99 percent.

This work was published in Nature. The magazine also ran a research briefing on the work.

Quickbits

• Repeated Ancilla Reuse for Logical Computation on a Neutral Atom Quantum Computer (PRX)

• Giant shot noise in superconductor/ferromagnet junctions with orbital-symmetry- controlled spin-orbit coupling (Nature Communications)

• Artificial intelligence for quantum computing (Nature Communications)

Quantum Campus is edited by Bill Bell, a science writer and marketing consultant who has covered physics and high-performance computing for more than 25 years. Disclosure statement.