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Oxford physicists push qubit precision to new heights

Oxford University physicists have achieved a world-first in quantum computing by setting a new record for single-qubit operation accuracy.

Using a trapped calcium ion as the qubit, the researchers controlled its state using electronic microwave signals instead of lasers.

Their experiment produced an error rate of just 0.000015 percent, or one mistake in 6.7 million operations, nearly ten times better than the previous benchmark set by the same team. The breakthrough brings quantum computers a step closer to becoming viable tools.

This more stable and cost-effective approach was conducted at room temperature and without magnetic shielding, simplifying future hardware requirements.

The precision reduces the number of qubits needed for error correction, making future quantum machines potentially smaller and faster.

Despite the milestone, the researchers emphasised the need to improve two-qubit gate fidelity, where error rates remain significantly higher.

The project is part of the UK Quantum Computing and Simulation Hub, with wider support from the National Quantum Technologies Programme.

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Quantum computers might break Bitcoin security faster than thought

Google researchers have revealed that breaking RSA encryption—the technology securing crypto wallets—requires far fewer quantum resources than previously thought. The team found cracking 2048-bit RSA could take under a week using fewer than a million noisy qubits, 20 times less than previously estimated.

Currently, quantum computers like IBM’s Condor and Google’s Sycamore operate with far fewer qubits, so crypto assets remain safe for now. The significance lies in the rapid pace of improvement in quantum computing capabilities, which calls for increased vigilance.

The breakthrough stems from improved algorithms that speed up key calculations and smarter error correction methods. Researchers also enhanced ‘magic state cultivation,’ a technique that boosts quantum operation efficiency by reducing resource waste.

Bitcoin relies on elliptic curve cryptography, similar in principle to RSA. If quantum computers can crack RSA sooner, Bitcoin’s security timeline could be shortened.

Efforts like Project 11’s quantum Bitcoin bounty highlight ongoing research to test the threat’s urgency.

Quantum threats extend beyond crypto, affecting global secure communications, banking, and digital signatures. Google has begun encrypting more traffic with quantum-resistant protocols in preparation for this shift.

Despite rapid progress, challenges remain. Quantum computers must maintain stability and coherence for long periods to execute complex operations. Currently, this remains a major hurdle, so there is no immediate threat.

It seems likely the first quantum-resistant blockchain upgrades will arrive well before any quantum attack on Bitcoin’s network.

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BlackRock flags quantum computing risk in Bitcoin ETF filing

BlackRock has highlighted quantum computing as a potential risk to Bitcoin’s long-term security in its recent Bitcoin ETF filing. The inclusion marks a rare mention of quantum risk in mainstream finance.

Bitcoin has been trading strongly, recently surpassing $105,000 before a slight pullback to around $103,000.

Quantum computing could theoretically break the cryptography that protects Bitcoin wallets, but experts stress this threat remains decades away. Bitcoin developers have been preparing for quantum resistance with upgrades like Taproot, and emerging cryptographic alternatives are already under testing.

The risk disclosure by BlackRock mainly follows SEC filing requirements rather than signalling imminent danger.

Bitcoin’s price momentum remains robust after breaking key resistance levels near $97,700. However, technical indicators like the RSI suggest the asset is approaching overbought conditions, which might lead to a short-term correction.

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BlackRock raises concerns over quantum computing risks to Bitcoin ETFs

BlackRock has flagged quantum computing as a potential risk to its iShares Bitcoin ETF (IBIT) in a recent regulatory filing. BlackRock highlighted the threat from emerging technologies, specifically quantum computing, to the cryptographic security of Bitcoin and blockchain networks.

BlackRock warned that advances in quantum computing could undermine the cryptographic algorithms protecting digital assets like Bitcoin. It is the first time BlackRock has explicitly mentioned this risk in relation to the IBIT ETF, with $64 billion in net assets.

Despite the warnings, analysts suggest that such risk disclosures are standard practice for financial products. James Seyffart, an analyst at Bloomberg Intelligence, noted that firms are required to flag all possible risks, even those with a very low likelihood of occurring.

Meanwhile, Bitcoin ETFs have seen a surge in popularity, attracting over $41 billion in net inflows since their launch.

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IBM boosts US manufacturing with $150 billion pledge

IBM has announced a major $150 billion investment in the US over the next five years, with a significant portion earmarked for expanding production of quantum computers and mainframes.

The move follows similar commitments from tech giants like Nvidia and Apple, as industry leaders respond to the Trump administration’s push for increased domestic manufacturing.

Of the total sum, more than $30 billion will be dedicated to scaling up IBM’s US-based manufacturing of quantum systems and mainframes, vital for processing vast data and critical tasks.

IBM, which operates one of the world’s largest quantum computing fleets, stated the investment reflects both technological ambition and a strategic gesture towards current US trade policies.

While the quantum computing field has seen exciting advancements, including new chip generations from rivals like Google, opinions remain divided on when practical applications will emerge.

IBM’s latest investment signals long-term confidence in the technology, even as the company navigates recent challenges, including the cancellation of 15 government contracts during federal cost-cutting efforts.

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MIT researchers boost quantum computing speed

Researchers at MIT have achieved a sign if icant milestone in quantum computing by demonstrating what they say is the strongest nonlinear light-matter coupling ever recorded.

Using a novel superconducting circuit architecture, the team developed a ‘quarton coupler’ that could dramatically boost the speed of quantum operations, making it possible to run processors about ten times faster than previous systems.

The coupler enables far stronger interactions between photons and artificial atoms—key components of quantum systems—which in turn allows for much faster and more accurate measurements of quantum data.

These improvements are crucial for increasing the number of error-correction rounds that can be completed before qubits lose their coherence, a major limitation in current quantum technology.

Faster readout could therefore pave the way toward fault-tolerant quantum computing, where large-scale real-world applications become possible.

Although the technology is not yet ready for commercial deployment, the research team sees this experiment as an essential foundation.

The architecture could eventually be adapted into more complex quantum processors with built-in readout circuits, allowing scientists to perform quantum computations at greater speed and precision.

The work was supported by the Army Research Office, the AWS Center for Quantum Computing, and MIT’s Center for Quantum Engineering.

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Fujitsu and RIKEN expand quantum computing with 256 qubits

Fujitsu and RIKEN, a prominent Japanese research institute, have unveiled a new 256-qubit superconducting quantum computer, marking a major advancement in quantum computing.

Located at the RIKEN RQC-FUJITSU Collaboration Center, the new machine is designed with high-density techniques, building on a previous model with 64 qubits. However, this increase will allow more complex molecule analysis and improved error correction algorithms.

Unlike its predecessors, this quantum computer will not be exclusive to Fujitsu and RIKEN. Both organisations plan to grant access to global companies and research institutes in the first quarter of fiscal 2025, enabling further innovation across various fields.

Alongside the qubit expansion, the teams have developed a breakthrough in cooling technology, using a dilution refrigerator with advanced thermal design to maintain efficiency.

Fujitsu and RIKEN also aim to enhance the platform’s usability by allowing seamless interaction between quantum and classical computers. This will enable users to run hybrid quantum-classical algorithms.

Looking ahead, the two organisations are working on a 1,000-qubit quantum computer, set to be installed next year, and have agreed to continue their partnership until 2029 to foster ongoing development.

While the 256-qubit computer does not yet compete with machines boasting over 1,000 qubits, it represents a crucial step in exploring diverse quantum computing approaches, as some may fail to scale effectively for practical use.

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Scientists achieve breakthrough in quantum computing stability

A new study by researchers from the University of Oxford, Delft University of Technology, Eindhoven University of Technology, and Quantum Machines has made a major step forward in quantum computing.

The team has found a way to make Majorana zero modes (MZMs)—special particles crucial for quantum computers—far more stable, bringing us closer to building error-free, scalable machines.

Quantum computers are incredibly powerful but face a key challenge: their basic units, qubits, are highly fragile and easily disrupted by environmental noise.

MZMs have long been seen as a potential solution because they are predicted to resist such disturbances, but stabilising them for practical use has been difficult until now.

The researchers created a structure called a three-site Kitaev chain, which is a simplified version of a topological superconductor.

By using quantum dots to trap electrons and connecting them with superconducting wires, they created a stable ‘sweet spot’ where MZMs could be farther apart, reducing interference and enhancing their stability.

Lead author Dr. Greg Mazur believes this breakthrough shows that it is possible to keep MZMs stable as quantum systems grow. With further research, the team aims to build longer chains to improve stability even more, potentially opening the door to reliable, next-generation quantum materials and devices.

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Advanced quantum computing could transform particle physics research

Scientists have made a major breakthrough in understanding the fundamental particles and forces that shape the universe.

A team from the University of Innsbruck in Austria and the Institute for Quantum Computing in Canada has successfully used quantum computers to simulate particle interactions more effectively than ever before.

The research introduces a new approach using qudits, which can store more information than traditional qubits.

With this technology, the team built a quantum computer capable of simulating a full quantum field theory in two dimensions, a significant improvement over previous efforts.

The simulations even revealed the formation of magnetic fields between particles, something not seen in earlier one-dimensional studies.

Researchers believe this advancement could lead to even more complex simulations, including three-dimensional particle interactions and insights into the strong nuclear force.

Physicist Martin Ringbauer describes the development as just the beginning, highlighting the potential of quantum computers to answer some of the biggest mysteries in physics.

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Scientists make progress in bridging quantum computers with optical networks

Researchers at Caltech have developed a groundbreaking silicon device that could help quantum computers communicate over long distances.

The innovation, created by a team led by Professor Mohammad Mirhosseini, successfully converts microwave photons into optical photons, overcoming a major challenge in quantum networking. Their findings were recently published in Nature Nanotechnology.

Quantum computers rely on microwave photons to store and process information, but these particles require near-zero temperatures and lose data when travelling through standard internet cables.

Optical photons, however, can move efficiently over long distances at room temperature. The new device acts as a bridge between the two, using a vibrating silicon beam to convert microwave signals into optical ones with remarkable efficiency.

Built from silicon to minimise noise, the transducer outperforms older systems by 100 times while maintaining the same level of signal clarity.

The breakthrough brings the concept of a quantum internet closer to reality, offering a scalable way to link quantum computers across vast networks in the future.

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