Category: quantum computing

Researchers have achieved a significant breakthrough in the realm of quantum physics by generating a peculiar particle within a quantum computer. This particle, known as a non-abelian anyon, possesses an intriguing ability to retain its past history. This newfound capability could potentially facilitate deeper exploration into the intricacies of quantum phenomena.

The non-abelian anyons, referred to as quasiparticles, have the unique property of preserving records of their previous positions when exchanged with one another. This distinctive feature allows physicists to intricately weave these particles together, forming complex entangled configurations that exhibit novel and unusual behaviors.

Intel recently revealed its latest quantum chip, “Tunnel Falls,” marking a significant milestone in its quantum computing roadmap. This silicon-based chip boasts 12 qubits and is primarily intended as a research test chip rather than a commercially available product. With this release, Intel aims to advance its long-term strategy of developing a complete commercial quantum computing system. While there are still challenges to overcome on the path to a fault-tolerant quantum computer, the academic community can now explore this technology and accelerate research development.

Jim Clarke, Intel’s director of Quantum Hardware, emphasized that Tunnel Falls represents the company’s most advanced silicon spin qubit chip to date, drawing on Intel’s extensive experience in transistor design and manufacturing. He stated, “The release of the new chip is the next step in Intel’s long-term strategy to build a full-stack commercial quantum computing system. While there are still fundamental questions and challenges that must be solved along the path to a fault-tolerant quantum computer, the academic community can now explore this technology and accelerate research development.”

A weird and wonderful array of technologies are competing to become the standard-bearer for quantum computing. The latest contender wants to encode quantum information in sound waves.

One thing all quantum computers have in common is the fact that they manipulate information encoded in quantum states. But that’s where the similarities end because those quantum states can be induced in everything from superconducting circuits to trapped ions, ultra-cooled atoms, photons, and even silicon chips.

While some of these approaches have attracted more investment than others, we’re still a long way from the industry settling on a common platform. And in the world of academic research, experimentation still abounds.

Now, a team from the University of Chicago has taken crucial first steps towards building a quantum computer that can encode information in phonons, the fundamental quantum units that make up sound waves, in much the same way that photons make up light beams.

The basic principles of how you could create a “phononic” quantum computer are fairly similar to those used in “photonic” quantum computers. Both involve generating and detecting individual particles or quasiparticles and manipulating them using beamsplitters and phase shifters. Phonons are quasiparticles because although they act like particles as far as quantum mechanics are concerned, they are actually made up of the collective behavior of large numbers of atoms.

A groundbreaking quantum computer named Juizhang, developed by a team led by renowned scientist Pan Jianwei, has made a remarkable claim of being able to process artificial intelligence (AI) tasks 180 million times faster than conventional computers, as reported by the South China Morning Post. Pan Jianwei, often referred to as the “father of quantum” in China, has been instrumental in advancing the country’s expertise in quantum computing, marking a significant stride in the field.

Unlike traditional computing, where bits can only represent one or zero, a quantum computing unit, or qubit, has the unique ability to exist in both states simultaneously. This characteristic allows qubits to process information faster than classical computers by considering all possible combinations at once.

Photonic bound states could advance medical imaging and quantum computing

For the first time, scientists at the University of Sydney and the University of Basel in Switzerland have demonstrated the ability to manipulate and identify small numbers of interacting photons — packets of light energy — with high correlation. advertisement This unprecedented achievement represents an important landmark in the development of quantum technologies.

It is published today in Nature Physics. Stimulated light emission, postulated by Einstein in 1916, is widely observed for large numbers of photons and laid the basis for the invention of the laser. With this research, stimulated emission has now been observed for single photons. Specifically, the scientists could measure the direct time delay between one photon and a pair of bound photons scattering off a single quantum dot, a type of artificially created atom.

“This opens the door to the manipulation of what we can call ‘quantum light’,” Dr Sahand Mahmoodian from the University of Sydney School of Physics and joint lead author of the research said.

BY MATT SWAYNE

• Qunnect announced the construction of a new fiber loop that expands its quantum networking testbed, GothamQ, from Brooklyn to Manhattan.
• The loop, which will connect New York University to the Navy Yard, is another step toward unlocking quantum internet capabilities for customers in financial services, critical infrastructure, and telecom in the New York metropolitan area, the company reports.
• Critical Quote: “We are building a creative collaboration whereby the educational and research environment can be used to develop a better understanding of quantum communication networks.” — Javad Shabani, NYU Arts & Science physicist.
• Image: Entangling New York City: In partnership with New York University (NYU), Qunnect has begun experiments to prove the feasibility of distribution of commercially-usable entanglement on some of the world’s noisiest, traffic-heavy fiber networks. Source: Qunnect.

PRESS RELEASE — – Qunnect, an industry leader in quantum-secure networking technology designed for scalable deployment on existing telecom fiber infrastructure, announced the construction of a new fiber loop that expands its quantum networking testbed, GothamQ, from Brooklyn to Manhattan. Connecting New York University (NYU) to the Navy Yard, Qunnect is poised to unlock quantum internet capabilities for customers in financial services, critical infrastructure, and telecom in the New York metropolitan area.

Researchers were able to send a signal through the open wormhole, though it’s not clear in what sense the wormhole can be said to exist.Credit: Kim Taylor/Quanta Magazine

Physicists have purportedly created the first-ever wormhole, a kind of tunnel theorized in 1935 by Albert Einstein and Nathan Rosen that leads from one place to another by passing into an extra dimension of space.

The wormhole emerged like a hologram out of quantum bits of information, or “qubits,” stored in tiny superconducting circuits. By manipulating the qubits, the physicists then sent information through the wormhole, they reported today in the journal Nature.

Artistic impression of a unimon qubit in a quantum processor.

A group of scientists from Aalto University, IQM Quantum Computers, and VTT Technical Research Center have discovered a new superconducting qubit, the unimon, to increase the accuracy of quantum computations. The team has achieved the first quantum logic gates with unimons at 99.9% fidelity—a major milestone on the quest to build commercially useful quantum computers. This research was just published in the journal Nature Communications.

Of all the different approaches to build useful quantum computers, superconducting qubits are in the lead. However, the qubit designs and techniques currently used do not yet provide high enough performance for practical applications. In this noisy intermediate-scale quantum (NISQ) era, the complexity of the implementable quantum computations is mostly limited by errors in single- and two-qubit quantum gates. The quantum computations need to become more accurate to be useful. 

“Our aim is to build quantum computers which deliver an advantage in solving real-world problems. Our announcement today is an important milestone for IQM, and a significant achievement to build better superconducting quantum computers,” said Professor Mikko Möttönen, joint Professor of Quantum Technology at Aalto University and VTT, and also a Co-Founder and Chief Scientist at IQM Quantum Computers, who was leading the research.

File illustration of the Chinese satellite Micius.

A Chinese micro-nano quantum satellite has entered its planned orbit and is now operational, the University of Science and Technology of China (USTC), one of its developers, said on Thursday.

The low-orbit satellite was designed to conduct real-time quantum key distribution experiments between the satellite and ground station, and to carry out technical verification. It was launched atop a Lijian-1 carrier rocket from the Jiuquan Satellite Launch Center in northwest China on Wednesday.

The new micro-nano satellite’s weight is about one-sixth the weight of the world’s first quantum satellite, the Chinese satellite Micius, which weighs more than 600 kilograms, according to the USTC.

The university said that, based on the quantum technology first seen in Micius, it is clear that more low-cost quantum satellites are needed to realize an efficient, practical and global quantum communication network that can meet the increasing user demand.