Quantum Computing News and Discussions

weatheriscool
Posts: 12973
Joined: Sun May 16, 2021 6:16 pm

Re: Quantum Computing News and Discussions

Post by weatheriscool »

Physicists Extend Qubit Lifespan in Pivotal Validation of Quantum Computing
Physics
09 April 2023
https://www.sciencealert.com/physicists ... -computing

Quantum computing promises to be a revolutionary tool, making short work of equations that classical computers would struggle to ever complete. Yet the workhorse of the quantum device, known as a qubit, is a delicate object prone to collapsing.

Keeping enough qubits in their ideal state long enough for computations has so far proved a challenge.

In a new experiment, scientists were able to keep a qubit in that state for twice as long as normal. Along the way, they demonstrated the practicality of quantum error correction (QEC), a process that keeps quantum information intact for longer by introducing room for redundancy and error removal.

The idea of QEC has been around since the mid-90s, but it's now been shown to work in real time. Part of the reason for the experiment's success was the introduction of machine learning AI algorithms to tweak the error correction routine.

"For the first time, we have shown that making the system more redundant and actively detecting and correcting quantum errors provided a gain in the resilience of quantum information," says physicist Michel Devoret, from Yale University in Connecticut.
weatheriscool
Posts: 12973
Joined: Sun May 16, 2021 6:16 pm

Re: Quantum Computing News and Discussions

Post by weatheriscool »

Physicists take step toward fault-tolerant quantum computing
https://phys.org/news/2023-04-physicist ... antum.html
by Kate Blackwood, Cornell University
Some classical computers have error correction built into their memories based on bits; quantum computers, to be workable in the future, will need error correction mechanisms, too, based on the vastly more sensitive qubits.

Cornell researchers have recently taken a step toward fault-tolerant quantum computing: they constructed a simple model containing exotic particles called non-Abelian anyons, compact and practical enough to run on modern quantum hardware. Realizing these particles, which can only exist in two dimensions, is a move towards implementing it in the real world.

Thanks to some creative thinking, Yuri Lensky, a former Bethe/Wilkins/Kavli Institute at Cornell (KIC) postdoctoral fellow in physics in the College of Arts and Sciences (A&S), collaborating with Eun-Ah Kim, professor of physics (A&S), came up with a simple "recipe" that could be used for robustly computing with non-Abelian anyons, including specific instructions for executing the effect experimentally on devices available today.

Their paper, "Graph Gauge Theory of Mobile Non-Abelian Anyons in a Qubit Stabilizer Code," written in collaboration with theorists at Google Quantum AI, published March 24 in Annals of Physics. Google Quantum AI researchers, together with Lensky and Kim, have proved the theory with a successful experiment as reported in a preprint publication, "Observation of Non-Abelian Exchange Statistics on a Superconducting Processor," on the research-sharing platform arXiv.

"This two-dimensional state is interesting both from a quantum condensed matter physics perspective—it has some novel properties that are very special to 2D physics—and from a quantum information perspective," Lensky said. "It's something truly quantum, but it's also potentially useful for quantum computation. It protects bits of quantum information by storing them non-locally, and our protocol allows us to compute with these bits."
weatheriscool
Posts: 12973
Joined: Sun May 16, 2021 6:16 pm

Re: Quantum Computing News and Discussions

Post by weatheriscool »

Swedish quantum computer applied to chemistry for the first time
https://phys.org/news/2023-04-swedish-q ... istry.html
by Jenny Holmstrand, Chalmers University of Technology
There are high expectations that quantum computers may deliver revolutionary new possibilities for simulating chemical processes. This could have a major impact on everything from the development of new pharmaceuticals to new materials. Researchers at Chalmers University have now, for the first time in Sweden, used a quantum computer to undertake calculations within a real-life case in chemistry.

"Quantum computers could in theory be used to handle cases where electrons and atomic nuclei move in more complicated ways. If we can learn to utilize their full potential, we should be able to advance the boundaries of what is possible to calculate and understand," says Martin Rahm, Associate Professor in Theoretical Chemistry at the Department of Chemistry and Chemical Engineering, who has led the study.

Within the field of quantum chemistry, the laws of quantum mechanics are used to understand which chemical reactions are possible, which structures and materials can be developed, and what characteristics they have. Such studies are normally undertaken with the help of super computers, built with conventional logical circuits. There is however a limit for which calculations conventional computers can handle. Because the laws of quantum mechanics describe the behavior of nature on a subatomic level, many researchers believe that a quantum computer should be better equipped to perform molecular calculations than a conventional computer.
weatheriscool
Posts: 12973
Joined: Sun May 16, 2021 6:16 pm

Re: Quantum Computing News and Discussions

Post by weatheriscool »

Counting photons for quantum computing
https://phys.org/news/2023-04-photons-quantum.html
by Tamara Dietrich, Thomas Jefferson National Accelerator Facility
Experts in nuclear physics and quantum information have demonstrated the application of a photon-number-resolving system to accurately resolve more than 100 photons. The feat is a major step forward in capability for quantum computing development efforts. It also may enable quantum generation of truly random numbers, a long-sought goal for developing unbreakable encryption techniques for applications in—for instance—military communications and financial transactions. The detector was recently reported in Nature Photonics.

Physicists around the world are hotly pursuing the promise of reliable and robust quantum computing. Not only would harnessing quantum computing herald a giant leap for science, but it would also elevate the economy and enhance national security. But getting there has so far eluded the best brains on the planet.

A pair of engineers at the U.S. Department of Energy's Thomas Jefferson National Accelerator Facility has designed a crucial piece of a photon detection system that has brought physicists a step closer to fully operational photonics-based quantum computing—that is, a quantum computer built entirely with light. The engineers are part of an interdisciplinary team of federal and academic researchers led by Jefferson Lab who are working on advancing quantum computing in nuclear physics.
Nanotechandmorefuture
Posts: 478
Joined: Fri Sep 17, 2021 6:15 pm
Location: At the moment Miami, FL

Re: Quantum Computing News and Discussions

Post by Nanotechandmorefuture »

weatheriscool wrote: Thu Apr 20, 2023 4:18 pm Swedish quantum computer applied to chemistry for the first time
https://phys.org/news/2023-04-swedish-q ... istry.html
by Jenny Holmstrand, Chalmers University of Technology
There are high expectations that quantum computers may deliver revolutionary new possibilities for simulating chemical processes. This could have a major impact on everything from the development of new pharmaceuticals to new materials. Researchers at Chalmers University have now, for the first time in Sweden, used a quantum computer to undertake calculations within a real-life case in chemistry.

"Quantum computers could in theory be used to handle cases where electrons and atomic nuclei move in more complicated ways. If we can learn to utilize their full potential, we should be able to advance the boundaries of what is possible to calculate and understand," says Martin Rahm, Associate Professor in Theoretical Chemistry at the Department of Chemistry and Chemical Engineering, who has led the study.

Within the field of quantum chemistry, the laws of quantum mechanics are used to understand which chemical reactions are possible, which structures and materials can be developed, and what characteristics they have. Such studies are normally undertaken with the help of super computers, built with conventional logical circuits. There is however a limit for which calculations conventional computers can handle. Because the laws of quantum mechanics describe the behavior of nature on a subatomic level, many researchers believe that a quantum computer should be better equipped to perform molecular calculations than a conventional computer.
There's a reason they call it joint intelligence worldwide. I imagine every tech the USA has is also available elsewhere.
weatheriscool
Posts: 12973
Joined: Sun May 16, 2021 6:16 pm

Re: Quantum Computing News and Discussions

Post by weatheriscool »

Quantum Computing Algorithm Breakthrough Brings Practical Use Closer to Reality
By Francisco Pires
published about 21 hours ago
https://www.tomshardware.com/news/quant ... ough-riken
Reducing quantum computers' complexity via software updates.


Out of all common refrains in the world of computing, the phrase "if only software would catch up with hardware" would probably rank pretty high. And yet, software does sometimes catch up with hardware. In fact, it seems that this time, software can go as far as unlocking quantum computations for classical computers. That's according to researchers with the RIKEN Center for Quantum Computing, Japan, who have published work on an algorithm that significantly accelerates a specific quantum computing workload. More significantly, the workload itself - called time evolution operators - has applications in condensed matter physics and quantum chemistry, two fields that can unlock new worlds within our own.
weatheriscool
Posts: 12973
Joined: Sun May 16, 2021 6:16 pm

Re: Quantum Computing News and Discussions

Post by weatheriscool »

Team demonstrates quantum advantage on optimization problems with a 5,000-qubit programmable spin glass
https://phys.org/news/2023-05-team-quan ... blems.html
by Ingrid Fadelli , Phys.org
Over the past decades, researchers and companies worldwide have been trying to develop increasingly advanced quantum computers. The key objective of their efforts is to create systems that will outperform classical computers on specific tasks, which is also known as realizing "quantum advantage."

A research team at D-Wave Quantum Inc., a Canadian quantum computing company, recently created a new quantum computing system that outperforms classical computing systems on optimization problems. This system, introduced in a paper in Nature, is based on a programmable spin glass with 5,000 qubits (the quantum equivalents of bits in classical computing).

"This work validates the original hypothesis behind quantum annealing, coming full circle from some seminal experiments conducted in the 1990s," Andrew D. King, one of the researchers who carried out the study, told Phys.org.

"These original experiments took chunks of spin-glass alloy and subjected them to varying magnetic fields, and the observations suggested that if we made a programmable quantum spin glass, it could drive down to low-energy states of optimization problems faster than analogous classical algorithms. A Science paper published in 2014 tried to verify this on a D-Wave Two processor, but no speedup was found."
weatheriscool
Posts: 12973
Joined: Sun May 16, 2021 6:16 pm

Re: Quantum Computing News and Discussions

Post by weatheriscool »

World's first portable quantum computers on sale in Japan: Prices start at $8,700
https://tech.news.am/eng/news/510/world ... $8700.html
December 21, 2022 10:30

The world's first portable quantum computers, Gemini Mini, Gemini and Triangulum, developed by the Chinese company SpinQ Technology, are on sale in Japan. The price for the simplest Gemini Mini 2-cubit system starts at $8,700, while the most expensive model of the three will cost about $58,000.

According to the Japanese portal PC Watch, in the past SpinQ Technology supplied its 2-Kubit quantum systems to educational institutions in China, Taiwan and Canada, where students could learn the principles of programming on quantum systems on these devices. Now anyone can buy such a device.

Gemini Mini is a conditionally portable, entry-level 2-cubit system (27 ± 1.5 MHz (H) and 11 ± 0.5 MHz (P) qubit frequencies) equipped with a touch screen. The coherence hold time is >20ms. The device weighs 14 kilograms with dimensions of 200 × 350 × 260 mm and costs, as noted, about $8,700. The device has built-in CASTOR software, allowing it to simulate the operation of 8 qubits.
weatheriscool
Posts: 12973
Joined: Sun May 16, 2021 6:16 pm

Re: Quantum Computing News and Discussions

Post by weatheriscool »


IBM Goal of 100,000 Qubit Quantum Supercomputer by 2033

May 21, 2023 by Brian Wang

https://www.nextbigfuture.com/2023/05/i ... -2033.html
IBM Research has a goal of scaling quantum systems to a size where they’ll be capable of solving the world’s most challenging problems. IBM wants to deploy a quantum-centric supercomputer powered by 100,000 qubits by 2033.

IBM has laid out a roadmap to reach 1000 qubit processors this year and 4000 qubits within two years.
weatheriscool
Posts: 12973
Joined: Sun May 16, 2021 6:16 pm

Re: Quantum Computing News and Discussions

Post by weatheriscool »

Researchers develop 'noise-canceling' qubits to minimize errors in quantum computers
https://phys.org/news/2023-05-noise-can ... antum.html
by Sarah C.P. Williams, University of Chicago
Despite their immense promise to solve new kinds of problems, today's quantum computers are inherently prone to error. A small perturbation in their surrounding environment— a change in temperature, pressure, or magnetic field, for instance—can disrupt their fragile computational building blocks, called qubits.

Now, researchers at the University of Chicago's Pritzker School of Molecular Engineering (PME) have developed a new method to constantly monitor the noise around a quantum system and adjust the qubits, in real-time, to minimize error.

The approach, described in Science, relies on spectator qubits: a set of qubits embedded in the computer with the sole purpose of measuring outside noise rather than storing data. The information gathered by such spectator qubits can then be used to cancel out noise in vital data-processing qubits.

Asst. Prof. Hannes Bernien, who led the research, likens the new system to noise-canceling headphones, which continuously monitor surrounding noises and emit opposing frequencies to cancel them out.

"With this approach, we can very robustly improve the quality of the data qubits," said Bernien. "I see this as being very important in the context of quantum computing and quantum simulation."
Post Reply