The innovative concept harnesses superfluid helium, a unique form of helium possessing extraordinary quantum properties, to construct a qubit that theoretically remains far less sensitive to many of the disruptive environmental factors that plague today’s leading quantum architectures. Quantum computers hold the profound potential to revolutionize calculation and data processing by relying on qubits to store and analyze information in ways fundamentally impossible for conventional, classical computers.
At present, many of the industry’s leading quantum systems depend heavily on superconducting circuits to maintain quantum states. However, these superconducting circuits are notoriously fragile and highly sensitive to external electromagnetic noise as well as stray electrical charges. This vulnerability is conceptually similar to the everyday phenomenon of static electricity, which can cause fine hairs to cling persistently to a balloon. Even the most minute, microscopic disturbances are capable of completely disrupting the delicate quantum information securely stored within a conventional qubit. As engineers and physicists strive to scale up quantum processors by adding increasing numbers of qubits, controlling and correcting these compounding errors becomes exponentially more difficult, cementing hardware scalability as one of the single greatest challenges facing the global quantum computing community.
In a study published in the academic journal npj Quantum Information, researchers hailing from the University of Surrey’s Quantum Sciences Group detail a drastically different architectural approach. Their design is built entirely around superfluid helium-3, which is an unusual, rare isotope of liquid helium capable of flowing completely without friction or viscosity.
The newly proposed device, formally designated by the research team as the Superfluid Helium Oscillator Quantum (SHOQ) device, utilizes charge-neutral superfluid helium. Because the helium particles carry absolute zero electric charge, the foundational physical design is naturally shielded and inherently protected from specific types of electromagnetic noise that typically wreak havoc on charged quantum components.
According to the team of researchers, this marks the very first reported design for a functional qubit engineered directly from a superfluid. Their exhaustive theoretical calculations strongly suggest that the innovative SHOQ device could achieve operational error rates approximately one hundred times lower than those recorded in conventional superconducting qubits.
Dr. Priya Sharma, a Daphne Jackson Fellow specializing in Hybrid Quantum Systems within the University of Surrey’s School of Mathematics and Physics, and the lead author of the newly published study, elaborated on the collaborative effort behind the breakthrough.
"We are not the first research group to think about the individual components and physical phenomena behind this idea," Dr. Sharma explained, highlighting the cumulative nature of scientific progress. "But what we have done for the very first time is bring them together seamlessly in a microfluidic device and carefully work out the precise, specific details that could enable the device to function reliably as a qubit."
She added that the underlying mathematical framework provides strong confidence in the viability of the concept. "The maths tells us that it should work. We have taken what we already know about superfluid helium and advanced quantum technologies and turned that into an educated design, complete with the exact parameters and specifications needed to build one. The next logical step for us is to make a physical prototype and put those theoretical predictions to the rigorous test."
Rather than functioning as a direct replacement for existing quantum computing hardware, the researchers emphasize that the SHOQ device is envisioned as a complementary technology. It could potentially be integrated directly alongside established superconducting quantum technology within a unified processing environment. Such an integration could pave the way for heterogeneous quantum systems, where different classes of qubits are assigned to perform distinct jobs or specialized tasks within the exact same computational architecture, depending heavily on their unique physical strengths.
One of the most compelling long-term possibilities emerging from this research is the deployment of the SHOQ device as a specialized form of quantum memory. In this envisioned operational setup, a superfluid-based qubit could maintain and store fragile quantum information securely while other hardware components carry out heavy computational lifting and processing routines.
Dr. Eran Ginossar, an Associate Professor in the Department of Physics and Advanced Technology Institute at the University of Surrey, as well as a co-author of the research study, emphasized the strategic advantage of diversification in quantum hardware design.
"We don’t necessarily need one single type of qubit to do everything," Dr. Ginossar noted. "Combining different and complementary quantum technologies could allow us to take full advantage of the specific strengths of each individual platform."
He further underscored the novelty of the material being investigated. "Superfluid helium gives us a fundamentally different type of quantum hardware to explore in the laboratory. If the predicted performance can be successfully demonstrated experimentally, it could eventually work alongside existing superconducting technologies as part of a much larger and more robust quantum system."
With the theoretical groundwork firmly established, the multidisciplinary research team is now shifting its focus toward physical realization. The Surrey team actively plans to construct a working prototype to determine definitively whether the theoretical performance modeled in their equations can be successfully replicated in a physical device. This critical next phase of development is receiving vital financial and institutional support through an IAA Commercialisation Fellowship awarded to Dr. Priya Sharma.
Operating the proposed SHOQ device will demand extreme environmental conditions, specifically requiring temperatures close to absolute zero. However, this is not seen as an insurmountable barrier, as researchers have already successfully reached and maintained the necessary ultra-low temperature conditions in previous experimental setups involving superfluid helium-3.
The ambitious project was spearheaded by the University of Surrey in close international collaboration with Professor Jens Koch at Northwestern University in the United States. Professor Koch brings immense historical expertise to the collaboration, having been one of the pioneering researchers directly involved in the development of the transmon—a prominent superconducting qubit design that has since become a cornerstone of modern quantum computing hardware architecture used by laboratories and technology corporations worldwide.