Take a bounce: A microscopic trampoline could help engineers to overcome a major hurdle for quantum computers, researchers from CU Boulder and the National Institute of Standards and Technology (NIST) report in a new study.
The research targets an important step for practical quantum computing: How can you convert microwave signals, such as those produced by quantum chips made by Google, Intel and other tech companies, into light beams that travel down fiberoptic cables? Scientists at JILA, a joint institute of CU Boulder and NIST, think they have the answer: They designed a device that uses a small plate to absorb microwave energy and bounce it into laser light.
The device can jump this gap efficiently, too, said JILA graduate student Peter Burns. He and his colleagues report that their quantum trampoline can convert microwaves into light with close to a 50 percent success rate—a key threshold that experts say quantum computers will need to meet to become everyday tools.
Burns said that his team’s research could one day help engineers to link together huge networks of quantum computers.
“Currently, there’s no way to convert a quantum signal from an electrical signal to an optical signal,” said Burns, one of two lead authors of the new study. “We’re anticipating a growth in quantum computing and are trying to create a link that will be usable for these networks.”
Such networks are on the horizon. Over the last decade, several tech firms have made inroads into designing prototype quantum chips. These devices encode information in what scientists call qubits, a more powerful storage tool than the traditional bits that run your home laptop. But getting the information out of such chips is a difficult feat, said Konrad Lehnert of JILA and a co-author of the new research.
Because outside interference can easily disrupt quantum signals, “you have to be cautious and gentle with the information you send,” said Lehnert, a NIST fellow.
One big challenge lies in translation. Top-of-the-line quantum chips like Google’s Bristlecone or Intel’s Tangle Lake send out data in the form of photons, or tiny packets of light, that wobble at microwave frequencies. Much of modern communications, however, relies on fiberoptic cables that can only send optical light.
In research published today in Nature Physics, the JILA group approached that challenge of fitting a square peg into a round hole with a tiny plate made of silicon-nitride. The team reports that zapping such a trampoline with a beam of microwave photons causes it to vibrate and eject photons from its other end—except these photons now quiver at optical frequencies.
The researchers were able to achieve that hop, skip and a jump at an efficiency of 47 percent, meaning that for every two microwave photons that hit the plate, close to one optical photon came out. That’s a much better performance than other methods for converting microwaves into light, such as by using crystals or magnets, Burns said.
He added that what’s really impressive about the device is its quietness. Even in the ultra-cold lab facilities where quantum chips are stored, trace amounts of heat can cause the team’s trampoline to shake. That, in turn, sends out excess photons that contaminate the signal. To get rid of the clutter, the researchers invented a new way to measure that noise and subtract it from their light beams. What’s left is a remarkably clean signal.
“What we do is measure that noise on the microwave side of the device, and that allows us to distinguish on the optical side between the signal and the noise,” Burns said.
The team will need to bring down the noise even more for the trampoline to become a practical tool. But it has the potential to enable a lot of networking. Even with recent advances in quantum chips, modern devices still have limited processing power. One way to get around that is to link together many smaller chips into a single number-cruncher, Lehnert said.
“It’s clear that we are moving toward a future where we will have little prototype quantum computers,” Lehnert said. “It will be a huge benefit if we can network them together.”
Learn more: Microscopic trampoline may help create networks of quantum computers
The Latest on: Quantum computer network
[google_news title=”” keyword=”quantum computer network” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Quantum computer network
- Wiring up quantum circuits with lighton May 27, 2023 at 5:47 am
The number of qubits in superconducting quantum computers has risen rapidly during the last years, but further growth is limited by the need for ultra-cold operating temperatures. Connecting several ...
- Report Estimates Trillions in Indirect Losses Would Follow Quantum Computer Hackon May 26, 2023 at 4:41 am
The continued development of quantum computing technologies stands to have a major impact on classically-encrypted digital networks, with a new report emphasizing the financial sector as a ...
- Study presents a new, highly efficient converter of quantum information carrierson May 25, 2023 at 9:08 am
Light is a key carrier of information. It enables high-speed data transmission around the world via fiber-optic telecommunication networks. This information-carrying capability can be extended to ...
- NaaS Vendors Are On The Front Line To Deliver Quantum-Ready Securityon May 25, 2023 at 3:30 am
a post-quantum crypto-agility provider. Ph.D. in AI/ML, founder of FlowTraq. The business of running a healthcare, manufacturing or utility company has nothing to do with running a computer network, ...
- U of C to develop quantum supercomputer with Google, IBM and University of Tokyoon May 21, 2023 at 4:06 pm
The University of Chicago formalized the partnership for quantum supercomputer technology at the Group of 7 Summit in Japan.
- University of Chicago joins global partnerships to advance quantum computingon May 21, 2023 at 5:00 am
IBM to help develop quantum-centric supercomputer; $50 million from Google to support quantum research and workforce development ...
- Study combines quantum computing and generative AI for drug discoveryon May 19, 2023 at 6:54 am
Insilico Medicine, a clinical stage generative artificial intelligence (AI)-driven drug discovery company, today announced that it combined two rapidly developing technologies, quantum computing and ...
- 8 Best Quantum Computing Stocks to Buy in 2023on May 16, 2023 at 12:06 pm
Quantum computing is operating at a higher and more commercially viable level in 2023. More than 91% of global CEOs say they're steering cash toward quantum computing, and 70% say they're generating ...
- AI, quantum computers and corporate networkson May 16, 2023 at 1:13 am
With the ability to significantly enhance AI algorithms, it’s no coincidence that the intersection of AI, quantum computing and corporate networks represents an area of active research and ...
via Bing News