Key Players Company in European Quantum Computing


Key Players Company in European Quantum Computing

Key Players in European Quantum Computing

Quantum computing is a rapidly developing field with the potential to revolutionize various industries. Europe is home to several key players making significant contributions to this exciting technology. 

Here's a look at some of the leading companies in the European quantum computing landscape:

CompanyFocus AreaKey Products/Services
Cambridge Quantum Computing (CQC)Quantum software and applicationst
QuiX QuantumQuantum hardware (photonics)Integrated photonic chips for quantum computers

CQC stands out for its expertise in quantum software. They offer a comprehensive platform (t|ket / TKET) for developing quantum algorithms and applications across various fields like chemistry, machine learning, and cybersecurity. Additionally, CQC provides industry-specific solutions like EUMEN for quantum chemistry and IronBridge/Origin for enhanced cybersecurity.

QuiX Quantum leads the way in Europe for quantum hardware development using photonics. Their focus lies on creating integrated photonic chips, a crucial component for building practical quantum computers. Their strategic expansion across Europe signifies their commitment to advancing this technology.

These are just two examples, and the European quantum computing landscape is constantly evolving. Other notable companies include:

  • Classiq (Quantum software development tools)
  • Quantum Machines (Hardware and control systems)
  • Quantralox (Quantum hardware integration and optimization)
  • Pasqal (Neutral atom quantum computing)

These companies contribute to different aspects of the quantum computing stack, working together to build a robust ecosystem for this transformative technology.

Key Players Company in European Quantum Computing

Cambridge Quantum Computing (CQC)

Cambridge Quantum Computing (CQC), now part of the larger company Quantinuum, was a leading force in the European quantum computing landscape, particularly known for its expertise in:

  • Quantum Software and Applications: CQC wasn't just about theoretical research. They developed a comprehensive platform called t|ket / TKET specifically designed for creating quantum algorithms and applications. This platform is hardware agnostic, meaning it can be used with various quantum hardware systems.

  • Industry-Specific Solutions: CQC recognized the potential of quantum computing across different fields. They offered specialized solutions like:

    • EUMEN: Focused on tackling problems in quantum chemistry, potentially leading to new drug discovery or advanced material design.
    • QML (Quantum Machine Learning): Aimed at harnessing the power of quantum mechanics for machine learning tasks.
    • IronBridge/Origin: Addressed the challenge of quantum-proof cryptography, aiming to create secure communication methods even in the age of quantum computers.

In June 2021, CQC merged with Honeywell Quantum Solutions (HQS) to form Quantinuum, the world's largest quantum computing company at the time. This merger combined CQC's software expertise with HQS's hardware capabilities, creating a powerhouse for quantum computing advancement.

Here are some additional points to consider:

  • CQC was founded in 2014 and had offices in the UK, Germany, and the USA.
  • They were backed by some of the leading names in quantum computing.
  • Their work made significant contributions to areas like finance, materials science, and drug discovery through the potential of quantum computation.

While CQC no longer operates as a separate entity, its legacy and contributions continue to play a vital role in Quantinuum's mission to develop and commercialize quantum computing solutions.

Key Players Company in European Quantum Computing

QuiX Quantum: Europe's Photonic Quantum Leader

QuiX Quantum is a Dutch company leading the charge in developing photonic quantum computers in Europe. Their focus lies on building the crucial hardware components to make these powerful machines a reality.

Photonic Approach:

Unlike some quantum computers that use trapped ions or superconducting circuits, QuiX Quantum utilizes photons (light particles) as the information carriers. They believe this approach offers advantages in terms of:

  • Scalability: Photons can be easily manipulated and integrated into circuits, potentially leading to larger and more powerful quantum computers.
  • Stability: Photons are less susceptible to environmental noise compared to other methods, which can improve the accuracy of computations.

Key Achievements:

QuiX Quantum has made significant strides in photonic quantum computing:

  • Integrated Photonic Chips: Their primary focus lies on creating these chips, essentially miniaturized circuits that handle and manipulate photons for quantum computations.
  • First Sale: They secured the first sale of their photonic quantum computer to the prestigious German Aerospace Center (DLR), demonstrating the growing interest and potential of their technology.
  • Breakthrough in Entanglement: Researchers using QuiX Quantum's technology successfully achieved on-chip generation of Greenberger-Horne-Zeilinger (GHZ) states. This is a critical step as GHZ states are a fundamental building block for many quantum algorithms.

Future Outlook:

QuiX Quantum is actively working to:

  • Develop a Universal Photonic Quantum Computer: Their goal is to build a versatile machine capable of tackling various quantum computing problems.
  • Expand their Reach: They are collaborating with research institutions and companies across Europe to accelerate advancements in photonic quantum computing.

Here are some additional points to consider:

  • QuiX Quantum was founded in 2019 by Dr. Hans van den Vlekkert and a team of experts in photonics.
  • They have their headquarters in Enschede, Netherlands, and utilize facilities at the DLR innovation center in Ulm.
  • Their work is backed by investors who see the potential of photonic quantum computing for revolutionizing various fields.

QuiX Quantum is a prominent player in Europe's quantum computing race, and their innovative approach using photons holds promise for the future of this transformative technology.

Key Players Company in European Quantum Computing

Projects by Cambridge Quantum Computing (CQC) and QuiX Quantum

Cambridge Quantum Computing (CQC), now part of Quantinuum, focused on developing software tools and applications for quantum computing. Here are some of their notable projects:

  • t|ket / TKET: This is CQC's flagship project, a comprehensive platform designed for building quantum algorithms and applications. Being hardware agnostic, it allows developers to create programs compatible with various quantum computing systems.

  • Industry-Specific Solutions: CQC recognized the potential of quantum computing across different sectors and developed specialized toolsets like:

    • EUMEN: This project tackled challenges in quantum chemistry, aiming to accelerate drug discovery and material design processes through the power of quantum simulations.
    • QML (Quantum Machine Learning): This project focused on developing algorithms that leverage the unique capabilities of quantum computers for machine learning tasks, potentially leading to breakthroughs in areas like pattern recognition and data analysis.
    • IronBridge/Origin: This project addressed the challenge of post-quantum cryptography. It aimed to create secure communication methods that remain robust even when quantum computers become readily available.

QuiX Quantum, on the other hand, is a leader in photonic quantum computing hardware in Europe. Here are some of their key projects:

  • Universal Photonic Quantum Computer: This ambitious project aims to build a versatile quantum computer using photonic technology. Unlike some other approaches, this computer would be capable of tackling a wide range of quantum computing problems.

  • Integrated Photonic Chips: This core project focuses on creating the essential hardware building blocks - miniaturized photonic circuits that can manipulate and control photons for quantum computations. Their success in developing these chips is crucial for building practical photonic quantum computers.

  • Collaboration with DLR: This project signifies QuiX Quantum's move towards real-world applications. They partnered with the prestigious German Aerospace Center (DLR) to develop and deliver the first commercially available photonic quantum computer.


  • Qmode Project: This collaborative project between QuiX Quantum and PHIX addressed the challenge of connecting large-scale photonic processors to the external world. Successfully managing these connections is essential for building scalable quantum computers.

  • Phoqusing Project: QuiX Quantum participated in this project focused on developing quantum sampling machines based on light, which are believed to have the potential to achieve quantum advantage in specific tasks.

These projects by CQC and QuiX Quantum highlight the different yet complementary approaches these companies take towards advancing quantum computing. While CQC focused on software tools and industry-specific applications, QuiX Quantum concentrated on developing the crucial photonic hardware. Together, their efforts contribute significantly to the overall progress of quantum computing in Europe.

Key Players Company in European Quantum Computing

The Road Ahead: Collaboration and Commercialization

Merging Strengths:

The merger of CQC with Honeywell Quantum Solutions (HQS) to form Quantinuum presents a unique opportunity. By combining CQC's software expertise with HQS's experience in building trapped-ion quantum computers, Quantinuum can potentially offer a comprehensive solution for various industries. This could involve:

  • Developing software specifically designed for HQS's hardware: Optimizing CQC's existing tools (like t|ket) for trapped-ion systems could unlock new capabilities and enhance performance.
  • Creating a hybrid approach: Combining photonic and trapped-ion technologies might offer advantages in specific applications. Qunatinuum, with its expertise in both areas through CQC and HQS, could be well-positioned to explore this possibility.

Commercialization Efforts:

Both CQC and QuiX Quantum have shown a commitment to moving beyond research and development towards commercializing their technologies. Here are some potential future directions:

  • Cloud-Based Access: Quantinuum could offer cloud access to its quantum computing resources, allowing companies and researchers to utilize their platform without significant upfront investment in hardware.
  • Industry Partnerships: Collaborating with pharmaceutical companies or materials science firms could accelerate the development and application of quantum solutions in these sectors.
  • Focus on Specific Use Cases: Both Quantinuum and QuiX Quantum could identify specific problems in finance, logistics, or other fields where their technology can provide a clear advantage and tailor their offerings accordingly.

Challenges and Opportunities:

Despite the progress, quantum computing still faces hurdles:

  • Hardware limitations: Quantum computers are still prone to errors and require significant improvements in stability and scalability.
  • Software development: Creating efficient and user-friendly quantum algorithms remains a challenge.
  • Standardization: The lack of standardized platforms and tools can hinder wider adoption.

However, these challenges also present opportunities for companies like Quantinuum and QuiX Quantum:

  • Leading innovation: By focusing on overcoming these hurdles, they can establish themselves as frontrunners in the field.
  • Building the ecosystem: Collaborating with other companies and research institutions can help develop standards and best practices for quantum computing.
  • Shaping the future: Their work can have a significant impact on how quantum computing is used and integrated into various industries.


CQC and QuiX Quantum have made significant contributions to the European quantum computing landscape. With continued innovation, collaboration, and a focus on commercialization, they are well-positioned to play a leading role in shaping the future of this transformative technology. The combined expertise of Quantinuum and QuiX Quantum's ongoing advancements in photonic technology hold great promise for unlocking the true potential of quantum computing in Europe and beyond.

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