Quantum Computing News and Discussions

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Superconducting qubit that lasts for over 1 millisecond is primed for industrial scaling
https://phys.org/news/2025-11-supercond ... trial.html
by Princeton University

In a major step toward practical quantum computers, Princeton engineers have built a superconducting qubit that lasts three times longer than today's best versions.

"The real challenge, the thing that stops us from having useful quantum computers today, is that you build a qubit and the information just doesn't last very long," said Andrew Houck, Princeton's dean of engineering and co-principal investigator. "This is the next big jump forward."

In an article in the journal Nature, the Princeton team report that their new qubit lasts for over 1 millisecond. This is three times longer than the best ever reported in a lab setting, and nearly 15 times longer than the industry standard for large-scale processors.

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Quantum sensor based on silicon carbide qubits operates at room temperature

by Ingrid Fadelli, Phys.org
https://phys.org/news/2025-11-quantum-s ... rbide.html

Over the past decades, physicists and quantum engineers introduced a wide range of systems that perform desired functions leveraging quantum mechanical effects. These include so-called quantum sensors, devices that rely on qubits (i.e., units of quantum information) to detect weak magnetic or electric fields.

Researchers at the HUN-REN Wigner Research Center for Physics, the Beijing Computational Science Research Center, the University of Science and Technology of China and other institutes recently introduced a new quantum sensing platform that utilizes silicon carbide (SiC)-based spin qubits, which store quantum information in the inherent angular momentum of electrons. This system, introduced in a paper published in Nature Materials, operates at room temperature and measures qubit signals using near-infrared light.

"Our project began with a puzzle," Adam Gali, senior author of the paper told Phys.org. "Quantum defects that sit just a few nanometers below a surface are supposed to be fantastic sensors—but in practice, they pick up a lot of 'junk' signals from the surface itself. This is especially true in SiC. Its standard oxide surface is full of stray charges and spins, and those produce noise that overwhelms the quantum defects we actually want to use for sensing. We wanted to break out of this limitation."

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Quantware 10K Qubits in 2028 and 1 Million in 2029 – #Q2B25
December 9, 2025 by Brian Wang
https://www.nextbigfuture.com/2025/12/q ... -2029.html
Quantware has solved the fanout problem for superconducting quantum computers. They are making breakthroughs that can scale quantum computers to millons of qubits by 2029.

They are at the Q2B silicon valley conference today at the Santa Clara convention center.

QuantWare announces VIO-40K, a new scaling architecture for quantum chips which solves the bottlenecks of scaling quantum computing, enabling 10,000 qubit quantum chips, 100x more qubits than current industry state-of-the-art from Google and IBM. It will be available in 2028.

* VIO-40K architecture supports 40,000 input–output lines and consists entirely of chiplet modules connected to each other via ultra-high-fidelity chip-to-chip connections.
* QuantWare’s architecture provides exponentially more compute per dollar and per watt compared to systems built out of many smaller QPUs connected over low-fidelity network connections – and it’s available to the entire industry so any organization working with superconducting qubits can now make more powerful QPUs.
* In addition, QuantWare will open KiloFab in Delft, Netherlands in 2026 – an industrial-scale fab to manufacture VIO-40K chips at large. QuantWare is already the world’s largest commercial provider of quantum hardware by volume in the world today, Kilofab will increase its production capacity by 20x.

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QuEra Thousands of Neutral Atom Qubits is a Few Years from Commercial Quantum Advantage #Q2B
December 15, 2025 by Brian Wang

https://www.nextbigfuture.com/2025/12/q ... e-q2b.html
QuEra will release a new roadmap to commercial quantum advantage in 2026. They presented progress to commercial quantum advantage over regular computers. They gave a talk at the Q2b 2025 conference (quantum to business).

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Silicon atom processor links 11 qubits with more than 99% fidelity

by Krystal Kasal, Phys.org
https://phys.org/news/2025-12-silicon-a ... ubits.html

In order to scale quantum computers, more qubits must be added and interconnected. However, prior attempts to do this have resulted in a loss of connection quality, or fidelity. But, a new study published in Nature details the design of a new kind of processor that overcomes this problem. The processor, developed by the company Silicon Quantum Computing, uses silicon—the main material used in classical computers—along with phosphorus atoms to link 11 qubits.
The 14|15 platform

The new design uses precision-placed phosphorus atoms in isotopically purified silicon-28, which are arranged into two multi-nuclear spin registers. One register contains four phosphorus atoms, while the other contains five, and each register shares an electron spin. The two registers are linked by electron exchange interaction, allowing for non-local connectivity across the registers and 11 linked qubits.

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Quantum computers could help sharpen images of exoplanets

Combining two kinds of quantum computing devices could be just the trick for taking better images of faint, faraway exoplanets

12 January 2026

Quantum computers may help us see more exoplanets – and see them in more detail too.

Astronomers have now found thousands of planets beyond our solar system, but they anticipate that there are actually billions of these exoplanets out there. Identifying and studying them is an integral part of the search for extraterrestrial life, but doing so is technically challenging because they are so distant from Earth.

Johannes Borregaard at Harvard University and his colleagues argue that quantum computers may significantly improve the process.

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Processing such weak signals is difficult with conventional methods, but a quantum computer could store a series of incoming photons’ quantum states, then leverage their quantum properties to extract information about the exoplanet, he says. In this way, an analysis that may normally only result in an image too blurry to tell an exoplanet apart from its star – or that renders it as a single fuzzy dot – could produce sharper depictions of the exoplanet in space. It might even allow researchers to pick out light-based fingerprints of molecules on the exoplanet.

https://www.newscientist.com/article/25 ... xoplanets/

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Efficient cooling method could enable chip-based quantum computers
https://phys.org/news/2026-01-efficient ... -chip.html
by Adam Zewe, Massachusetts Institute of Technology

Quantum computers could rapidly solve complex problems that would take the most powerful classical supercomputers decades to unravel. But they'll need to be large and stable enough to efficiently perform operations. To meet this challenge, researchers at MIT and elsewhere are developing quantum computers based on ultra-compact photonic chips. These chip-based systems offer a scalable alternative to some existing quantum computers, which rely on bulky optical equipment.

These quantum computers must be cooled to extremely cold temperatures to minimize vibrations and prevent errors. So far, such chip-based systems have been limited to inefficient and slow cooling methods.

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