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Category: quantum physics – Page 77

Joint research demonstrating the ability to readout superconducting qubits with an optical transducer was published in Nature Physics.

Quantum computing has the potential to drive transformative breakthroughs in fields such as advanced material design, artificial intelligence, and drug discovery. Of the quantum computing modalities, superconducting qubits are a leading platform towards realizing a practical quantum computer given their fast gate speeds and ability to leverage existing semiconductor industry manufacturing techniques.

However, fault-tolerant quantum computing will likely require 10,000 to a million physical qubits. The sheer amount of wiring, amplifiers and microwave components required to operate such large numbers of qubits far exceeds the capacity of modern-day dilution refrigerators, a core component of a superconducting quantum computing system, in terms of both space and passive heat load.

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In a groundbreaking study, scientists developed new ways to control atom collisions using optical tweezers, offering insights that could advance quantum computing and molecular science. By manipulating light frequencies and atomic energy levels, they mapped out how specific atomic characteristics influence collision outcomes, paving the way for more precise quantum manipulation.

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A collaborative team of researchers from the Max Planck Institute for Structure and Dynamics of Matter (MPSD), Nanjing University, Songshan Lake Materials Laboratory (SLAB), and international partners has introduced a new method to regulate exotic electronic states in two-dimensional materials.

Building on the foundations laid by their previous work on twisted van der Waals materials, the team of physicists has now discovered a novel way to manipulate correlated electronic states in twisted double bilayer tungsten diselenide (TDB-WSe₂). This breakthrough offers new possibilities for developing advanced quantum materials and devices.

By precisely twisting two bilayers of WSe₂ near a 60-degree angle and applying a perpendicular electric field, the researchers have achieved control over the interaction between two distinct electronic bands, known as the K-valley and Γ-valley bands. This tuning has led to the observation of a “valley charge-transfer insulator”—an exotic state where electron movement is highly correlated, and electrical conductivity is suppressed.

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As the fundamental flaw of today’s quantum computers, improving qubit stability remains the focus of much research in this field. One such stability attempt involves so-called topological quantum computing with the use of anyons, which are two-dimensional quasiparticles. Such an approach has been claimed by Microsoft in a recent paper in Nature. This comes a few years after an earlier claim by Microsoft for much the same feat, which was found to be based on faulty science and hence retracted.

The claimed creation of anyons here involves Majorana fermions, which differ from the much more typical Dirac fermions. These Majorana fermions are bound with other such fermions as a Majorana zero mode (MZM), forming anyons that are intertwined (braided) to form what are in effect logic gates. In the Nature paper the Microsoft researchers demonstrate a superconducting indium-arsenide (InAs) nanowire-based device featuring a read-out circuit (quantum dot interferometer) with the capacitance of one of the quantum dots said to vary in a way that suggests that the nanowire device-under-test demonstrates the presence of MZMs at either end of the wire.

Microsoft has a dedicated website to their quantum computing efforts, though it remains essential to stress that this is not a confirmation until their research is replicated by independent researchers. If confirmed, MZMs could provide a way to create more reliable quantum computing circuitry that does not have to lean so heavily on error correction to get any usable output. Other, competing efforts here include such things as hybrid mechanical qubits and antimony-based qubits that should be more stable owing to their eight spin configurations.

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The achievement comes after the company spent nearly two decades of research in the field, but Microsoft claims that building Majorana 1 required that it create an entirely new state of matter, which it is referring to as a topological state.

Microsoft’s quantum chip employs eight topological qubits using indium arsenide, which is a semiconductor, and aluminum, which is a superconductor.

“The difficulty of developing the right materials to create the exotic particles and their associated topological state of matter is why most quantum efforts have focused on other kinds of qubits,” the company said in a blog Wednesday.

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In today’s AI news, Codeium, an AI-powered coding startup, is raising a new round of funding at a $2.85 billion valuation. The round is being led by returning investor Kleiner Perkins, the people said. The new round comes just six months after Silicon Valley-based Codeium announced that it had closed a $150 million Series C at a $1.25 billion post-money valuation.

In other advancements, a couple of weeks after the initial release of Mistral’s AI assistant, Le Chat, the company told Le Parisien that it has reached one million downloads. “Go and download Le Chat, which is made by Mistral, rather than ChatGPT by OpenAI — or something else,” French president Emmanuel Macron said in a TV interview ahead of the recent AI Action Summit in Paris.

And, Google is launching a new experiment that uses AI to help people explore more career possibilities. The company announced in a blog post on Wednesday that a new “Career Dreamer” tool can find patterns between your experiences, educational background, skills, and interests to connect you with careers that might be a good fit.

Meanwhile, Forbes’ Lance Eliot analyzes a popular mantra right now. The recent AI-industry groupthink that says we merely need to increase the so-called “thinking time” of generative AI and LLMs to get better responses. AI makers are allowing users to stipulate that the AI can expend more time and effort doing various processing before displaying a generated answer.

In videos, Microsoft’s Satya Nadella sits down with Dwarkesh Patel to talk about their new Majorana Quantum chip breakthrough, plans for artificial general intelligence, topological qubits, gaming world models, and whether Microsoft Office commoditizes LLMs, or the other way around.

Then, dive into the world of Model Context Protocol and learn how to seamlessly connect AI agents to databases, APIs, and more. IBM’s Roy Derks breaks down its components, from hosts to servers, and showcases real-world applications. Gain the knowledge to revolutionize your AI projects.

Continue reading “AI-Coding Startup Codeium In Talks To Raise Funds At Almost Billion Valuation” | >

Tech giant Microsoft unveiled a new computer chip on Wednesday that it says could transform everything from fighting pollution to developing new medicines, joining Google and IBM in arguing that the promise of quantum computing is closer to reality.

The US-made , called Majorana 1, can fit in the palm of a hand but packs a revolutionary design that Microsoft believes will solve one of the biggest challenges in quantum computing—making these super-powerful machines reliable enough for real-world use.

“We took a fresh approach and basically reinvented how quantum computers could work,” said Chetan Nayak, a senior scientist at Microsoft.

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Introducing a breakthrough in quantum computing. The Majorana 1 chip. An approach that ignores the limitations of current models to unleash the power of millions of potential qubits all working together to solve unsolvable challenges in creating new medicines, entirely new materials, and helping our natural world. All on a single chip.

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Microsoft announced a major milestone in its quantum computing efforts on Wednesday, unveiling its first quantum computing chip, called Majorana 1. Jason Zander, Microsoft’s executive VP of strategic missions and technologies explains this breakthrough and how it gets quantum computing technology closer to real world applications. Zander speaks to Bloomberg Technology’s Jackie Davalos.
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Hear from the Microsoft team behind the recent breakthrough in physics and quantum computing demonstrated by the new Majorana 1 chip, engineered from an entirely new material that has the potential to scale to millions of qubits on a single chip. Find out what is possible…

Chapters:
0:00 — Introducing Majorana 1
1:26 — Why does quantum computing matter?
2:47 — Qubits, the building blocks of quantum computing.
5:05 — Understanding the topological state.
7:00 — How the Majorana 1 chip works.
9:10 — How quantum and classical computing work together.
10:13 — The Quantum Age.

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Twitter: https://twitter.com/Microsoft.
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Instagram: https://www.instagram.com/microsoft/

For more about Microsoft, our technology, and our mission, visit https://aka.ms/microsoftstories

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