Alice & Bob Joins European PhD Network QuBriC Focused on Quantum Error Correction

【Article Title】 Alice & Bob Joins European PhD Network QuBriC Focused on Quantum Error Correction 【Article Body】 AI TRANSLATION This article is an AI-generated translation of the original Japanese article. For the authoritative version, please refer to the original. Read the original Japanese article → (https://quantumindex.jp/alice-bob-joins-qubric-qec-doctoral-network/) Alice & Bob has joined QuBriC, Europe’s first Marie Skłodowska-Curie Actions (MSCA) doctoral network dedicated to quantum error correctionquantum error correction量子誤り訂正 / Quantum Error Correction / QECA technique that distributes information across multiple physical qubits and detects and corrects errors without directly disturbing the quantum state.QI NoteSimply implementing it does not automatically provide practical fault tolerance. What matters is whether the logical error rate is improved relative to the physical error rate. (QEC). As an industrial partner, the company will provide expertise on cat qubitcat qubitCat Qubit / Cat Qubit / Schrödinger Cat QubitA qubit designed to use "cat states"—superpositions of distinct quantum states—to make certain types of errors less likely.QI NoteIt may reduce the overhead required for error correction, but not all errors are automatically suppressed. Attention should also be paid to the remaining error rates.–based error correction and participate in designing the research and training program. ✍️ Quantum Index Analysis We explain the technical and business implications behind the announcement and the evaluation points that are not obvious from numbers or headlines alone. Read our independent analysis ↓ Announcement Summary The full name of QuBriC is “Bridging Quantum and Classical Error Correction for Scalable Fault-tolerant Quantum ComputingFault-tolerant Quantum ComputingFTQC / Fault-Tolerant Quantum Computing / FTQCA method for future large-scale quantum computing that uses quantum error correction to allow correct computation to continue even when physical errors occur.QI NoteA demonstration of quantum error correction is not the same as realizing FTQC. Logical error rates, the number of physical qubits required, logical gate performance, and so on are important..” The network brings together 23 organizations—16 academic institutions and 7 quantum computing companies—and will recruit and train 15 doctoral researchers. The network will receive EUR 4.6 million in support from the MSCA program under Horizon Europe over 48 months. It aims to train talent capable of spanning quantum information, classical coding theory, and hardware engineering, covering everything from theory and algorithms to hardware implementation. Alice & Bob will contribute expertise on cat qubit–based quantum error correction and take part in designing the research and training. For the company, this is an opportunity to broaden connections with specialists and academic networks related to fault-tolerant quantum computing, although no specific research outcomes, performance targets, or commercialization timelines were presented. Key points • QuBriC includes 23 organizations: 16 academic institutions and 7 quantum companies • 15 doctoral researchers will be recruited to provide cross-disciplinary opportunities to study quantum error correction • The MSCA program under Horizon Europe will fund EUR 4.6 million over 48 months • Alice & Bob will contribute expertise in cat qubit–based error correction and help design research and training activities Technical and business implications Quantum error correction is a crucial technical area for building scalable fault-tolerant quantum computers. The required expertise spans quantum physics, coding theory, algorithms, and hardware implementation. QuBriC is an attempt to address these disciplinary divisions through an industry–academia collaborative doctoral program. For Alice & Bob, it provides a way to integrate the cat qubit approach into a research and education network, but the announcement does not specify concrete research results, performance targets, or commercialization timing. What to watch next The first point to observe will be whether the recruitment and training of the 15 doctoral researchers proceeds as planned. From a research perspective, it will be important to see whether the network produces results that connect theory to hardware implementation and whether specific research topics related to Alice & Bob’s cat qubit approach are presented. In addition, it will be necessary to assess how joint成果 and personnel exchanges among participating institutions translate into actual fault-tolerant quantum computing research. ✍️ Quantum Index Analysis The important issue in this announcement is less about talent development per se and more about whether QuBriC can supplement areas of QECQEC量子誤り訂正 / Quantum Error Correction / QECA technique that distributes information across multiple physical qubits and detects and corrects errors without directly disturbing the quantum state.QI NoteSimply implementing it does not automatically provide practical fault tolerance. What matters is whether the logical error rate is improved relative to the physical error rate. that Alice & Bob has not yet demonstrated. The company’s Helium system is at the stage of constructing the first logical qubitlogical qubitLogical Qubit / Logical QubitA unit of information treated as a single qubit protected from errors by using multiple physical qubits and quantum error correction.QI NoteSimply having “created a logical qubit” does not necessarily mean fault-tolerant quantum computing (FTQC) has been achieved. One should verify logical error rates, operational/gate performance, and scalability. from 18 cat qubitscat qubitsCat Qubit / Cat Qubit / Schrödinger Cat QubitA qubit designed to use "cat states"—superpositions of distinct quantum states—to make certain types of errors less likely.QI NoteIt may reduce the overhead required for error correction, but not all errors are automatically suppressed. Attention should also be paid to the remaining error rates. and aiming for below-thresholdbelow-thresholdBelow-Threshold / Below-Threshold / Below-Threshold Performance / Below the Error-Correction ThresholdIn quantum error correction, a regime in which physical error rates lie below a critical threshold, so that increasing the size of the code reduces logical errors.QI Note“Below-threshold” is not itself the achievement of practical quantum computation. It is necessary to check which error-correcting code, decoder, and noise conditions were used to verify it, and to examine the reduction in logical errors when the code distance is increased. operation. Its next-generation Lithium system targets multiple logical qubits and error-corrected logical gates. The technical challenge is shifting from single-device longevity to system-level QEC encompassing code design, decoding, and control. Here, the connection with QuBriC is concrete. Public information indicates that Alice & Bob will host a doctoral researcher on the topic of “code constructions and logical operations for biased-noise qubitsqubitsQubit / Quantum Bit / QubitThe basic unit of information in a quantum computer. It can represent not only 0 or 1 but also a quantum state that is a superposition of them.QI NoteHaving more qubits does not necessarily mean higher performance. Error rates, connectivity, coherence time, and the number of logical qubits are also important.,” with planned secondments to INRIA, the University of Navarra, and TU Delft. This directly links to the company’s cat qubit strategy. Alice & Bob is also pursuing research on low-overhead QEC such as Elevator CodesElevator Codesエレベーター符号 / Elevator CodesA scheme for qubits with “biased noise” — where certain types of errors are strongly suppressed — that combines multiple codes to reduce the overhead/burden of error correction.QI NoteA new scheme proposed in 2026, specifically assuming a strong noise bias such as that of cat qubits. In performance comparisons it is important to verify not only the logical error rate but also the required noise bias and the number of physical qubits needed., so QuBriC could serve not merely as a recruitment channel but as a venue to deepen code design tailored to the hardware through external research collaboration. However, across the industry Alice & Bob has not yet demonstrated measured logical-QEC performance. Google has already demonstrated below-threshold operation with the surface codesurface codeSurface Code / Surface Code / Surface Quantum Error-Correcting CodeA representative quantum error-correcting code that arranges qubits on a lattice and detects and corrects errors by repeatedly performing local measurements.QI NoteIt is regarded as promising because it is relatively easy to implement, but the required number of physical qubits varies greatly depending on error rates, code distance, and other factors. In company announcements, it is important to confirm the assumptions behind “how many physical qubits make one logical qubit.”, and the advantage Alice & Bob claims for cat qubits—lower overhead—can only be evaluated in competitiveness once logical error rates and logical gate performance are compared. Participation in QuBriC alone does not bridge that gap. The key question going forward is whether research within QuBriC will concretely lead to a below-threshold logical qubit on Helium and to error-corrected logical gates on Lithium. If code theory is successfully connected to the noise characteristics specific to cat qubits, and if equivalent or better logical performance can be demonstrated with less hardware than alternative approaches, then participation in this network will matter beyond talent development and influence Alice & Bob’s overall QEC strategy. Related articles • Alice & Bob announces on-premises quantum system “Helium” with 18 cat qubits (https://en.quantumindex.jp/alice-bob-helium-quantum-system/) • Infleqtion supports operation of Japan’s first full-stack neutral-atom quantum computer “Shunkai” (https://en.quantumindex.jp/infleqtion-shunkai-neutral-atom-quantum-computer/) • OptQC and NTT form a capital and business partnership aiming for a 1-million-physical-qubit-class photonic quantum computer by FY2030 (https://en.quantumindex.jp/optqc-ntt-photonic-quantum-computer-partnership-2026/) Source Read the original announcement (https://alice-bob.com/newsroom/alice-bob-partners-on-europes-first-doctoral-network-dedicated-to-quantum-error-correction/) If you found this article useful, please consider sharing it. ──────────────────── 【AI Evaluation Request】 Evaluate the following article critically, not based on the quality of its writing, but on its **original informational value as a specialist publication**. Do not give a high rating to summaries, paraphrases, explanations of technical terms, or generic observations such as "this will be worth watching" or "the timeline remains uncertain" if they could easily be produced by a general-purpose generative AI, even if they are well written. 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Alice & Bob has joined QuBriC, Europe’s first Marie Skłodowska-Curie Actions (MSCA) doctoral network dedicated to quantum error correctionquantum error correction量子誤り訂正 / Quantum Error Correction / QECA technique that distributes information across multiple physical qubits and detects and corrects errors without directly disturbing the quantum state.QI NoteSimply implementing it does not automatically provide practical fault tolerance. What matters is whether the logical error rate is improved relative to the physical error rate. (QEC). As an industrial partner, the company will provide expertise on cat qubitcat qubitCat Qubit / Cat Qubit / Schrödinger Cat QubitA qubit designed to use "cat states"—superpositions of distinct quantum states—to make certain types of errors less likely.QI NoteIt may reduce the overhead required for error correction, but not all errors are automatically suppressed. Attention should also be paid to the remaining error rates.–based error correction and participate in designing the research and training program.

Announcement Summary

The full name of QuBriC is “Bridging Quantum and Classical Error Correction for Scalable Fault-tolerant Quantum ComputingFault-tolerant Quantum ComputingFTQC / Fault-Tolerant Quantum Computing / FTQCA method for future large-scale quantum computing that uses quantum error correction to allow correct computation to continue even when physical errors occur.QI NoteA demonstration of quantum error correction is not the same as realizing FTQC. Logical error rates, the number of physical qubits required, logical gate performance, and so on are important..” The network brings together 23 organizations—16 academic institutions and 7 quantum computing companies—and will recruit and train 15 doctoral researchers. The network will receive EUR 4.6 million in support from the MSCA program under Horizon Europe over 48 months. It aims to train talent capable of spanning quantum information, classical coding theory, and hardware engineering, covering everything from theory and algorithms to hardware implementation. Alice & Bob will contribute expertise on cat qubit–based quantum error correction and take part in designing the research and training. For the company, this is an opportunity to broaden connections with specialists and academic networks related to fault-tolerant quantum computing, although no specific research outcomes, performance targets, or commercialization timelines were presented.

Key points

• QuBriC includes 23 organizations: 16 academic institutions and 7 quantum companies
• 15 doctoral researchers will be recruited to provide cross-disciplinary opportunities to study quantum error correction
• The MSCA program under Horizon Europe will fund EUR 4.6 million over 48 months
• Alice & Bob will contribute expertise in cat qubit–based error correction and help design research and training activities

Technical and business implications

Quantum error correction is a crucial technical area for building scalable fault-tolerant quantum computers. The required expertise spans quantum physics, coding theory, algorithms, and hardware implementation. QuBriC is an attempt to address these disciplinary divisions through an industry–academia collaborative doctoral program. For Alice & Bob, it provides a way to integrate the cat qubit approach into a research and education network, but the announcement does not specify concrete research results, performance targets, or commercialization timing.

What to watch next

The first point to observe will be whether the recruitment and training of the 15 doctoral researchers proceeds as planned. From a research perspective, it will be important to see whether the network produces results that connect theory to hardware implementation and whether specific research topics related to Alice & Bob’s cat qubit approach are presented. In addition, it will be necessary to assess how joint成果 and personnel exchanges among participating institutions translate into actual fault-tolerant quantum computing research.

✍️ Quantum Index Analysis

The important issue in this announcement is less about talent development per se and more about whether QuBriC can supplement areas of QECQEC量子誤り訂正 / Quantum Error Correction / QECA technique that distributes information across multiple physical qubits and detects and corrects errors without directly disturbing the quantum state.QI NoteSimply implementing it does not automatically provide practical fault tolerance. What matters is whether the logical error rate is improved relative to the physical error rate. that Alice & Bob has not yet demonstrated. The company’s Helium system is at the stage of constructing the first logical qubitlogical qubitLogical Qubit / Logical QubitA unit of information treated as a single qubit protected from errors by using multiple physical qubits and quantum error correction.QI NoteSimply having “created a logical qubit” does not necessarily mean fault-tolerant quantum computing (FTQC) has been achieved. One should verify logical error rates, operational/gate performance, and scalability. from 18 cat qubitscat qubitsCat Qubit / Cat Qubit / Schrödinger Cat QubitA qubit designed to use "cat states"—superpositions of distinct quantum states—to make certain types of errors less likely.QI NoteIt may reduce the overhead required for error correction, but not all errors are automatically suppressed. Attention should also be paid to the remaining error rates. and aiming for below-thresholdbelow-thresholdBelow-Threshold / Below-Threshold / Below-Threshold Performance / Below the Error-Correction ThresholdIn quantum error correction, a regime in which physical error rates lie below a critical threshold, so that increasing the size of the code reduces logical errors.QI Note“Below-threshold” is not itself the achievement of practical quantum computation. It is necessary to check which error-correcting code, decoder, and noise conditions were used to verify it, and to examine the reduction in logical errors when the code distance is increased. operation. Its next-generation Lithium system targets multiple logical qubits and error-corrected logical gates. The technical challenge is shifting from single-device longevity to system-level QEC encompassing code design, decoding, and control.

Here, the connection with QuBriC is concrete. Public information indicates that Alice & Bob will host a doctoral researcher on the topic of “code constructions and logical operations for biased-noise qubitsqubitsQubit / Quantum Bit / QubitThe basic unit of information in a quantum computer. It can represent not only 0 or 1 but also a quantum state that is a superposition of them.QI NoteHaving more qubits does not necessarily mean higher performance. Error rates, connectivity, coherence time, and the number of logical qubits are also important.,” with planned secondments to INRIA, the University of Navarra, and TU Delft. This directly links to the company’s cat qubit strategy. Alice & Bob is also pursuing research on low-overhead QEC such as Elevator CodesElevator Codesエレベーター符号 / Elevator CodesA scheme for qubits with “biased noise” — where certain types of errors are strongly suppressed — that combines multiple codes to reduce the overhead/burden of error correction.QI NoteA new scheme proposed in 2026, specifically assuming a strong noise bias such as that of cat qubits. In performance comparisons it is important to verify not only the logical error rate but also the required noise bias and the number of physical qubits needed., so QuBriC could serve not merely as a recruitment channel but as a venue to deepen code design tailored to the hardware through external research collaboration.

However, across the industry Alice & Bob has not yet demonstrated measured logical-QEC performance. Google has already demonstrated below-threshold operation with the surface codesurface codeSurface Code / Surface Code / Surface Quantum Error-Correcting CodeA representative quantum error-correcting code that arranges qubits on a lattice and detects and corrects errors by repeatedly performing local measurements.QI NoteIt is regarded as promising because it is relatively easy to implement, but the required number of physical qubits varies greatly depending on error rates, code distance, and other factors. In company announcements, it is important to confirm the assumptions behind “how many physical qubits make one logical qubit.”, and the advantage Alice & Bob claims for cat qubits—lower overhead—can only be evaluated in competitiveness once logical error rates and logical gate performance are compared. Participation in QuBriC alone does not bridge that gap.

The key question going forward is whether research within QuBriC will concretely lead to a below-threshold logical qubit on Helium and to error-corrected logical gates on Lithium. If code theory is successfully connected to the noise characteristics specific to cat qubits, and if equivalent or better logical performance can be demonstrated with less hardware than alternative approaches, then participation in this network will matter beyond talent development and influence Alice & Bob’s overall QEC strategy.

Related articles

• Alice & Bob announces on-premises quantum system “Helium” with 18 cat qubits
• Infleqtion supports operation of Japan’s first full-stack neutral-atom quantum computer “Shunkai”
• OptQC and NTT form a capital and business partnership aiming for a 1-million-physical-qubit-class photonic quantum computer by FY2030

Source

Read the original announcement