Quantum Computing

Sector Overview: Korea's Quantum Ambition

Quantum computing represents the farthest technological horizon in the K-Moonshot portfolio, a domain where fundamental physics research intersects with national security imperatives and long-term economic competitiveness. Mission 12 (Error-Correcting Quantum Computers) tasks Korea with developing fault-tolerant quantum computers capable of solving problems beyond the reach of any classical supercomputer, a goal that, if achieved, would reshape cryptography, materials science, drug discovery, financial modeling, and logistics optimization.

Korea's commitment to quantum computing is substantial and growing. The national quantum budget has expanded from approximately USD 140 million in 2024 to over USD 250 million in 2025, with a cumulative commitment of 3 trillion KRW (approximately USD 2.3 billion) through 2035. This funding supports a multi-pronged strategy encompassing hardware development across multiple qubit technologies, quantum error correction research, quantum algorithm development, quantum networking and communication, and workforce development targeting 2,500 quantum researchers by 2030.

The sector's strategic significance extends beyond the quantum computing applications themselves. Quantum computing capability is increasingly viewed as a prerequisite for national competitiveness in the post-classical computing era. Nations that master quantum error correction and scale fault-tolerant systems will gain asymmetric advantages in cryptanalysis, materials design, and optimization problems that affect every sector of the economy. For Korea, which has built its economic model on technological leadership in semiconductors, displays, and digital infrastructure, falling behind in quantum computing would represent a strategic vulnerability of the first order.

Hardware Development: Multiple Qubit Platforms

Korea's quantum hardware strategy pursues multiple qubit technologies simultaneously, hedging against the uncertainty that pervades the global quantum computing field regarding which physical implementation will ultimately prove most scalable for fault-tolerant computation.

Trapped-Ion Systems: KISTI and IonQ Korea

The most immediately visible element of Korea's quantum hardware programme is the Korea Institute of Science and Technology Information's (KISTI) deployment of a 100-qubit trapped-ion quantum computer, manufactured by IonQ, targeted for operational readiness by Q2 2026. This system will be Korea's most powerful quantum processor and among the most advanced trapped-ion systems deployed outside the United States.

Trapped-ion quantum computing uses individual atoms suspended in electromagnetic fields as qubits, with quantum operations performed by precisely aimed laser pulses. The technology offers high gate fidelities (the accuracy of quantum operations) and long coherence times (the duration for which quantum information is preserved), advantages that make trapped-ion systems particularly suitable for near-term quantum applications requiring high reliability per operation.

IonQ, the US-based quantum computing company co-founded by Christopher Monroe and Jungsang Kim (a Korean-American physicist from Duke University), has established IonQ Korea as a dedicated entity serving the Korean market. SK Telecom is a significant investor in IonQ and has partnered with the company to develop quantum computing cloud services and quantum key distribution (QKD) network integration. The SK Telecom-IonQ relationship provides Korean users with both hardware access and cloud-based quantum computing services.

Photonic Quantum Computing: ETRI and Xanadu

The Electronics and Telecommunications Research Institute (ETRI) has established a partnership with Xanadu, the Canadian photonic quantum computing company, to develop photonic quantum processor technology. Photonic quantum computing uses particles of light (photons) as qubits, offering potential advantages in room-temperature operation (eliminating the need for cryogenic cooling), natural compatibility with telecommunications infrastructure, and the ability to perform certain classes of computation, particularly Gaussian boson sampling, with high efficiency.

The ETRI-Xanadu collaboration focuses on developing photonic quantum chips using silicon photonics fabrication techniques compatible with semiconductor manufacturing processes. This alignment with Korea's semiconductor manufacturing capabilities is strategically significant: if photonic quantum processors can be fabricated using modified semiconductor foundry processes, Korea's existing semiconductor infrastructure could provide a manufacturing advantage in quantum hardware production.

Superconducting Qubits: Samsung and Academic Research

Samsung Electronics' quantum computing research focuses on superconducting qubit technology, the platform used by IBM, Google, and most other leading quantum hardware developers. Samsung's Advanced Institute of Technology (SAIT) maintains research programmes in qubit materials, cryogenic control electronics, and quantum chip fabrication. Samsung's semiconductor fabrication capabilities provide potential for manufacturing superconducting quantum processors at a scale that purely quantum-focused startups cannot match.

Korean university programmes at KAIST, Seoul National University, and Korea University contribute fundamental research in superconducting qubit coherence improvement, quantum gate design, and cryogenic measurement techniques. KAIST's Quantum Computing Laboratory, led by faculty with backgrounds at Google Quantum AI and IBM Research, provides both research output and the graduate student pipeline essential for Korea's quantum workforce development.

Quantum Error Correction: KIST's World-Record Breakthrough

The Korea Institute of Science and Technology (KIST) has achieved what may be Korea's most internationally significant quantum computing result: a quantum error correction protocol demonstrating a 14 percent photon loss threshold, the highest reported globally. This result, while operating within the photonic quantum computing paradigm, has implications that extend across all qubit technologies because quantum error correction is the universal challenge that must be solved to build practical, fault-tolerant quantum computers.

Quantum error correction addresses a fundamental problem: individual qubits are extremely fragile, losing their quantum information through interaction with the environment (decoherence) at rates that render raw qubits useless for long computations. Error correction encodes logical quantum information across multiple physical qubits, enabling the detection and correction of errors without destroying the quantum computation. The higher the error threshold a correction scheme can tolerate, the fewer physical qubits are required per logical qubit, directly affecting the practical scalability of quantum computers.

KIST's 14 percent photon loss threshold means that their error correction protocol can maintain reliable quantum computation even when 14 percent of photonic qubits are lost during processing, a remarkably high tolerance that suggests photonic quantum computing may be more practically scalable than previously estimated. This result strengthens the case for the photonic approach pursued in the ETRI-Xanadu collaboration and provides Korea with a distinctive intellectual property position in quantum error correction theory.

The Global Quantum Race

Korea's quantum computing programme operates within an intensely competitive global landscape where the United States, China, the European Union, the United Kingdom, Canada, Australia, and Japan all maintain substantial national quantum initiatives.

United States

The US quantum ecosystem is the world's largest and most diverse. IBM's roadmap targets over 100,000 qubits by 2033. Google's Willow processor has demonstrated quantum error correction performance improving with system size. IonQ, Quantinuum (Honeywell), and PsiQuantum (photonic, USD 600 million+ raised) represent different technology approaches, all well-funded. The US National Quantum Initiative, launched in 2018, provides federal coordination and approximately USD 1.5 billion in initial funding, with subsequent appropriations expanding support through DOE national laboratories, NSF research programmes, and DARPA quantum projects.

China

China's quantum computing programme is the largest by government funding. The University of Science and Technology of China (USTC), under Pan Jianwei's leadership, has demonstrated quantum computational advantage using both photonic (Jiuzhang) and superconducting (Zuchongzhi) processors. The Chinese government's quantum investment is estimated at several billion dollars annually, with dedicated quantum research centres in Hefei, Shanghai, and Beijing. China's quantum communication network, including quantum satellite Micius, is the world's most advanced quantum key distribution infrastructure.

European Union

The EU Quantum Flagship programme has committed EUR 1 billion over ten years, supporting projects across all quantum technology pillars (computing, communication, simulation, sensing). Key European quantum companies include IQM (Finland, superconducting), Pasqal (France, neutral atoms), and QuEra (originally US, expanding European operations). The European High-Performance Computing Joint Undertaking is integrating quantum computing accelerators into European supercomputing centres.

United Kingdom

The UK's National Quantum Technologies Programme has invested over GBP 1 billion since 2014. The UK quantum ecosystem includes PsiQuantum's Bristol operations, Quantinuum's Cambridge office, Oxford Quantum Circuits, and multiple university spin-offs. The UK's strength in quantum theory and algorithms provides research depth, though manufacturing scale remains a challenge.

Commercial Applications and Use Cases

Korea's quantum computing strategy targets specific commercial applications aligned with the country's industrial strengths.

Materials simulation for semiconductor development represents the most direct intersection with Korea's existing technology base. Quantum computers can simulate molecular and materials properties at a level of accuracy impossible for classical computers, potentially accelerating the discovery of new semiconductor materials, battery chemistries, and catalysts. This application connects directly to the Advanced Materials and Semiconductor sectors.

Drug discovery applications complement Mission 1's AI drug development programme. Quantum simulation of protein-ligand interactions could identify drug candidates that classical AI approaches miss, providing a computational capability upgrade for Korea's pharmaceutical AI pipeline.

Financial optimization addresses the needs of Korea's large financial sector, including portfolio optimization, risk modeling, and derivative pricing. Korean financial institutions including KB Financial Group and Shinhan Financial Group have established quantum computing research partnerships with KISTI and university laboratories.

Cryptography and cybersecurity present both opportunities and threats. Quantum computers threaten current public-key cryptographic systems (RSA, ECC) that protect digital communications and financial transactions. Korea's quantum programme includes post-quantum cryptography (PQC) research to develop encryption standards resistant to quantum attack, and quantum key distribution (QKD) network development for quantum-secure communications. SK Telecom's QKD network deployments in Korea represent early commercial implementations of quantum-secure infrastructure.

Logistics and supply chain optimization applies quantum algorithms to the complex optimization problems inherent in Korea's export-oriented manufacturing economy. Samsung, Hyundai, and other Korean manufacturers operate global supply chains where quantum-optimized routing, scheduling, and inventory management could yield significant cost reductions.

SK Telecom: The Commercial Quantum Anchor

SK Telecom serves as the commercial anchor of Korea's quantum ecosystem, with investments spanning quantum computing hardware (IonQ partnership), quantum communication (QKD networks), and quantum cloud services. The company's quantum strategy is rooted in its telecommunications infrastructure, which provides both the connectivity backbone for quantum cloud access and the most immediate commercial application for quantum-secure communications.

SK Telecom has deployed QKD systems on portions of Korea's telecommunications backbone, enabling quantum-secured data transmission between data centres. The company's partnership with IonQ provides cloud access to trapped-ion quantum processors for Korean enterprise and research users. SK Telecom's quantum investment is estimated at several hundred billion KRW cumulatively, making it the largest private sector quantum investor in Korea.

The company's quantum talent recruitment has drawn researchers from global institutions, and SK Telecom operates a dedicated quantum research centre within its broader T-Hub innovation campus. The centre's research programmes include quantum algorithm development for telecommunications optimization, quantum machine learning applications, and quantum-classical hybrid computing architectures.

Workforce Development and Talent Pipeline

Korea's quantum workforce target of 2,500 quantum researchers by 2030 reflects a recognition that talent is the binding constraint on national quantum capability. Quantum computing requires expertise spanning quantum physics, computer science, materials science, and electrical engineering, a multidisciplinary profile that universities have only recently begun to produce in significant numbers.

KAIST has established a dedicated quantum computing programme within its Department of Physics, with faculty recruited from leading global quantum laboratories. Seoul National University's quantum information science programme draws from both the physics and electrical engineering departments. POSTECH, GIST (Gwangju Institute of Science and Technology), and Korea University maintain smaller but growing quantum research groups.

The government's quantum workforce development programme includes graduate fellowships, international research exchange programmes, and industry-academic partnership schemes that place graduate students in corporate quantum laboratories at Samsung, SK Telecom, and Korean startups. The National Research Foundation (NRF) has designated quantum science as a priority funding area, with dedicated grant programmes for early-career quantum researchers.

Despite these efforts, Korea faces a quantum talent deficit relative to the US, China, and Europe. The global competition for quantum researchers is intense, with US companies and national laboratories, European quantum startups, and Chinese research institutions all recruiting from the same limited pool of PhD-level quantum scientists. Korea's challenge is not only to produce more quantum researchers domestically but also to create research environments and compensation packages competitive enough to retain them against international recruitment.

Quantum Infrastructure and Ecosystem

Korea's quantum infrastructure development extends beyond computing hardware to include quantum communication networks, quantum simulation facilities, and quantum-classical hybrid computing environments.

KISTI operates Korea's primary quantum computing access point, providing cloud-based access to quantum processors for academic and industrial researchers. The deployment of the IonQ 100-qubit system at KISTI will significantly expand available quantum computing resources and enable research groups across Korea to conduct quantum experiments without maintaining their own hardware.

The Korean Quantum Computing Ecosystem Alliance, established in 2024, coordinates industry, academic, and government participants to develop shared quantum software tools, benchmarking standards, and application libraries. The alliance includes Samsung, SK Telecom, KISTI, KAIST, and multiple quantum startups, providing a collaborative framework for pre-competitive research and ecosystem development.

Quantum startup activity in Korea has grown, with companies including QunaSys Korea (quantum chemistry applications), QRAFT Technologies (quantum machine learning for finance), and several university spin-offs developing quantum software and applications. The venture capital ecosystem has begun funding quantum startups, though deal sizes remain smaller than in the US or Europe, reflecting the sector's early stage and the long timelines to commercial revenue.

Budget and Funding Architecture

The 3 trillion KRW quantum computing budget through 2035 flows through multiple government agencies. The Ministry of Science and ICT (MSIT) provides the largest share through the K-Moonshot budget framework and dedicated quantum technology programmes. The National Research Foundation (NRF) funds academic research grants. KISTI receives operational funding for quantum computing infrastructure. The Ministry of Trade, Industry and Energy (MOTIE) supports quantum technology commercialization programmes.

The budget's decade-long horizon is significant. Quantum computing development requires sustained investment over timescales that exceed typical political cycles and corporate planning horizons. The 2035 commitment provides Korean quantum researchers and companies with long-term funding visibility, reducing the risk of stop-start funding patterns that have disrupted quantum programmes in other countries.

Private sector quantum investment, led by SK Telecom and Samsung, supplements government funding. The combined public-private quantum investment positions Korea among the top five national quantum programmes globally by total spending, behind the United States and China but competitive with the European Union and the United Kingdom.

Risk Assessment

Korea's quantum computing sector faces several risks that are characteristic of an inherently uncertain technological domain.

Technology risk is the most fundamental. It remains uncertain which qubit technology will prove most scalable for fault-tolerant quantum computing. Korea's multi-platform approach (trapped-ion, photonic, superconducting) hedges against this risk but also spreads resources across multiple development paths. If one technology emerges as clearly dominant, the funding allocated to alternative approaches will have yielded limited returns.

Timeline risk is inherent to quantum computing. Practical, fault-tolerant quantum computers have been forecast as five to ten years away for the past two decades. While recent progress in quantum error correction has been encouraging, the path from today's noisy intermediate-scale quantum (NISQ) devices to commercially useful fault-tolerant systems remains uncertain. Korea's 2035 target for Mission 12 is ambitious, and delays are historically common in quantum technology development.

Talent competition from the US and China threatens to drain Korea's quantum workforce. The compensation differential between Korean quantum positions and US-based roles at Google, IBM, Amazon, or well-funded startups is substantial. Retaining top quantum talent in Korea requires not only competitive compensation but also access to world-class equipment, international collaboration opportunities, and research autonomy.

Cryptographic transition risk creates urgency independent of quantum computing applications. As quantum computers advance toward cryptographically relevant capabilities, the transition to post-quantum cryptography (PQC) standards becomes a national security imperative. Korea's financial, telecommunications, and defense infrastructure must begin PQC migration regardless of the timeline for domestic quantum computer development.

Strategic Outlook

Korea's quantum computing sector combines meaningful research achievements (KIST's error correction breakthrough), growing infrastructure (KISTI's IonQ system), substantial corporate engagement (SK Telecom, Samsung), and long-term government funding commitment (3 trillion KRW through 2035) into a national programme of genuine global standing. The sector is not yet competitive with US or Chinese programmes by overall scale, but Korea's targeted investments in specific quantum technologies, particularly trapped-ion systems through the IonQ partnership and photonic approaches through the ETRI-Xanadu collaboration, create focused capability areas where Korean contributions are internationally significant.

The sector's success will ultimately be measured by whether Korea achieves fault-tolerant quantum computing capabilities on a timeline competitive with global peers, and whether those capabilities are translated into practical applications that benefit Korea's broader technology and economic priorities. The connections to semiconductor development, drug discovery, materials science, and AI research ensure that quantum computing advances will propagate across the entire K-Moonshot architecture, making this sector a potential multiplier for Korea's broader technological ambitions.