New Silicon Structure Opens the Gate to Quantum Computers
December 12, 2017 | Princeton UniversityEstimated reading time: 5 minutes
The researchers demonstrated that they can use the first qubit to control the second qubit, signifying that the structure functioned as a controlled NOT (CNOT) gate, which is the quantum version of a commonly used computer circuit component. The researchers control the behavior of the first qubit by applying a magnetic field. The gate produces a result based on the state of the first qubit: If the first spin is pointed up, then the second qubit’s spin will flip, but if the first spin is down, the second one will not flip.
“The gate is basically saying it is only going to do something to one particle if the other particle is in a certain configuration,” Petta said. “What happens to one particle depends on the other particle.”
The researchers showed that they can maintain the electron spins in their quantum states with a fidelity exceeding 99 percent and that the gate works reliably to flip the spin of the second qubit about 75 percent of the time. The technology has the potential to scale to more qubits with even lower error rates, according to the researchers.
“This work stands out in a worldwide race to demonstrate the CNOT gate, a fundamental building block for quantum computation, in silicon-based qubits,” said HongWen Jiang, a professor of physics and astronomy at the University of California-Los Angeles. “The error rate for the two-qubit operation is unambiguously benchmarked. It is particularly impressive that this extraordinarily difficult experiment, which requires a sophisticated device fabrication and an exquisite control of quantum states, is done in a university lab consisting of only a few researchers.”
Additional researchers at Princeton are graduate student Felix Borjans and associate research scholar Anthony Sigillito. The team included input on the theory aspects of the work by Jacob Taylor, a professor at the Joint Quantum Institute and Joint Center for Quantum Information and Computer Science at the National Institute of Standards and Technology and the University of Maryland, and Maximilian Russ and Guido Burkard at the University of Konstanz in Germany.
Research was sponsored by U.S. Army Research Office grant W911NF-15-1-0149, the Gordon and Betty Moore Foundation’s EPiQS Initiative through grant GBMF4535, and National Science Foundation grant DMR-1409556. Devices were fabricated in the Princeton University Quantum Device Nanofabrication Laboratory.
The study, “Resonantly driven CNOT gate for electron spins,” by David M. Zajac, Anthony J. Sigillito, Maximilian Russ, Felix Borjans, Jacob M. Taylor, Guido Burkard and Jason R. Petta was published online in the journal Science on Dec. 7, 2017.
Page 2 of 2Suggested Items
Koh Young Showcases Award-winning Inspection Solutions at SMTconnect with SmartRep in Hall 4A.225
04/25/2024 | Koh Young TechnologyKoh Young Technology, the industry leader in True 3D measurement-based inspection solutions, will showcase an array of award-winning inspection and measurement solutions at SMTconnect alongside its sales partner, SmartRep, in booth 4A.225 at NürnbergMesse from June 11-13, 2023. The following offers a glimpse into what Koh Young will present at the tradeshow:
KYZEN to Promote Pair of Stencil Cleaning Chemistries at SMTA Ciudad Jaurez Expo & Tech Forum
04/25/2024 | KYZEN'KYZEN, the global leader in innovative environmentally friendly cleaning chemistries, will exhibit at the SMTA Ciudad Juarez Expo & Tech Forum, scheduled to take place Thursday, May 9, 2024 at the Injectronic Convention Center in Ciudad Jaurez, Chihuahua, Mexico. During the event the KYZEN Clean Team will focus on understencil cleaning products KYZEN E5631J and CYBERSOLV C8882.
Foxconn Pledges 100% Renewable Electricity by 2040, Joins RE100
04/22/2024 | FoxconnHon Hai Technology Group announced its worldwide operations will run fully on green electricity by 2040 and has joined the global initiative RE100, in a milestone on Earth Day 2024 that adds the world’s largest electronics manufacturer and technology solution provider among the most influential businesses committed to 100% renewable electricity.
Synaptics Astra AI-Native IoT Platform Launches with SL-Series Embedded Processors and Machina Foundation Series Development Kit
04/08/2024 | SynapticsSynaptics® Incorporated launched the Synaptics Astra platform with the SL-Series of embedded AI-native Internet of Things (IoT) processors and the Astra MachinaTM Foundation Series development kit.
Canon Taiwan Earns IPC J-STD-001 and IPC-A-610 Qualified Manufacturer’s Listing
04/04/2024 | IPCIPC’s Validation Services Program has awarded an IPC Qualified Manufacturers Listing (QML) to Canon Taiwan, a leader in the optical industry, producing single-lens reflex/mirrorless digital cameras, camera lenses, accessories and network surveillance monitors.