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Call key data
Quantum Computing – complementing the quantum computing FPAs with the development of a technology agnostic software stack
Funding Program
Horizon Europe: Cluster 4 - Digital, Industry and Space
Call number
HORIZON-CL4-2025-03-DIGITAL-EMERGING-02
deadlines
Opening
10.06.2025
Deadline
02.10.2025 17:00
Funding rate
100%
Call budget
€ 10,000,000.00
Estimated EU contribution per project
€ 5,000,000.00
Link to the call
Link to the submission
Call content
short description
This topic emphasizes the strategic importance of collaboration between Horizon Europe quantum computing software and hardware projects and the EuroHPC Joint Undertaking’s quantum projects, including high-performance computing-quantum middleware, integration, and Quantum Excellence Centres. Successful applicants will be required to closely collaborate and agree on the interfaces for the main layers of the software stack at the beginning of their projects. It is crucial that the projects collaborate from the outset to define open interfaces for the main layers of the software stack. These interfaces should be open for consultation and incorporate input from existing initiatives to ensure they are well aligned with current developments in the field. All interface specifications should be properly documented as they will serve as the foundational basis for the development of different layers and facilitate seamless collaboration across projects.
Call objectives
Quantum APIs and cloud access form the transition layer between users and quantum machines in the quantum computation stack. This layer includes general-purpose quantum software development kits that are used to implement quantum algorithms for both gate-based systems, simulators and quantum annealers. This call seeks proposals that address the creation of a cohesive software stack that is agnostic to quantum hardware, facilitating the development, testing, and deployment of quantum applications across various platforms.
Proposals are encouraged to build on, or seek collaboration with, existing projects, and develop synergies and ensure complementarities with other relevant European, national, or regional initiatives and funding programmes. In particular, links are encouraged with the following, as well as with the EuroHPC Joint Undertaking:
- HORIZON-CL4-2021-DIGITAL-EMERGING-02-17: Framework Partnership Agreement for developing large-scale quantum simulation platform technologies (FPA)
- HORIZON-CL4-2021-DIGITAL-EMERGING-02-15: Framework Partnership Agreement for developing the first large-scale quantum computers (FPA)
- HORIZON-CL4-2023-DIGITAL-EMERGING-01-43: Framework Partnership Agreement for developing large-scale quantum Computing platform technologies (FPA)
- HORIZON-CL4-QUANTUM-02-SGA - Developing large-scale quantum simulation platform technologies (SGA)
- HORIZON-CL4-QUANTUM-01-SGA - Developing the first large-scale quantum computers (SGA)
In addition, proposals are expected to develop synergies with relevant projects funded under the Digital Europe Programme (DEP).
Proposals should also contribute to spreading excellence across Europe; for example, through the involvement of EU Widening Countries.
In this topic the integration of the gender dimension (sex and/or gender analysis) in research and innovation content is not a mandatory requirement; however, should proposers consider it to be of relevance for their proposal, they are strongly encouraged to integrate it.
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Expected effects and impacts
In line with the European Commission’s commitment to open access and reuse of software, when possible, all developments under this call should utilize open-source software platforms and be published in open repositories such as GitHub. Additionally, the use of appropriate software licenses, such as those listed as free by the Free Software Foundation and listed as open source by the Open Source Initiative, or under the European Union Public Licence (EUPL), is strongly recommended.
Moreover, the beneficiaries will have to ensure open access to other research outputs like data and workflows under the principle ‘as open as possible and as closed as necessary’ and in accordance with the FAIR (Findable, Accessible, Interoperable, Reusable) data principles.
Expected results
Project results are expected to contribute to the following expected outcomes:
- Establishing a universal, interoperable quantum computing ecosystem that supports diverse hardware platforms through the creation of a technology-agnostic software stack.
- Seamlessly integrating quantum computing with classical computing systems, including HPC and cloud services (including the EuroHPC Joint Undertaking’s supercomputers, and the quantum computers and simulators already integrated into them), and demonstrating practical quantum computing applications by showcasing use cases that combine quantum and classical computing capabilities
- Advancing the development of standardized software architectures, compilers, and simulators that ensure application portability and performance across different quantum computing platforms.
- Demonstration of workflows that effectively combine quantum and classical computing to address complex computational challenges, providing clear examples of the added value of quantum acceleration or showing a quantum advantage.
- Support for initiatives aimed at training software developers in quantum programming and developing libraries for basic quantum algorithms, including the integration of quantum error correction mechanisms.
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Eligibility Criteria
Regions / countries for funding
Canada, Iceland (Ísland), Israel (ישראל / إِسْرَائِيل), New Zealand (Aotearoa), Norway (Norge), Switzerland (Schweiz/Suisse/Svizzera), United Kingdom
eligible entities
EU Body, Education and training institution, Non-Profit Organisation (NPO) / Non-Governmental Organisation (NGO), Other, Private institution, incl. private company (private for profit), Public Body (national, regional and local; incl. EGTCs), Research Institution incl. University, Small and medium-sized enterprise (SME)
Mandatory partnership
Yes
Project Partnership
To be eligible for funding, applicants must be established in one of the following countries:
- the Member States of the European Union, including their outermost regions
- the Overseas Countries and Territories (OCTs) linked to the Member States
- countries associated to Horizon Europe - see list of particpating countries
Only legal entities forming a consortium are eligible to participate in actions provided that the consortium includes, as beneficiaries, three legal entities independent from each other and each established in a different country as follows:
- at least one independent legal entity established in a Member State; and
- at least two other independent legal entities, each established in different Member States or Associated Countries.
Any legal entity, regardless of its place of establishment, including legal entities from non-associated third countries or international organisations (including international European research organisations) is eligible to participate (whether it is eligible for funding or not), provided that the conditions laid down in the Horizon Europe Regulation have been met, along with any other conditions laid down in the specific call topic.
A ‘legal entity’ means any natural or legal person created and recognised as such under national law, EU law or international law, which has legal personality and which may, acting in its own name, exercise rights and be subject to obligations, or an entity without legal personality.
Specific cases:
- Affiliated entities (i.e. entities with a legal or capital link to a beneficiary which participate in the action with similar rights and obligations to the beneficiaries, but which do not sign the grant agreement and therefore do not become beneficiaries themselves) are allowed, if they are eligible for participation and funding.
- Associated partners (i.e. entities which participate in the action without signing the grant agreement, and without the right to charge costs or claim contributions) are allowed, subject to any conditions regarding associated partners set out in the specific call conditions.
- Entities which do not have legal personality under their national law may exceptionally participate, provided that their representatives have the capacity to undertake legal obligations on their behalf, and offer guarantees to protect the EU’s financial interests equivalent to those offered by legal persons.
- Legal entities created under EU law (EU bodies) including decentralised agencies may be part of the consortium, unless provided for otherwise in their basic act.
- International European research organisations are eligible to receive funding. International organisations with headquarters in a Member State or Associated Country are eligible to receive funding for ‘Training and mobility’ actions or when provided for in the specific call/topic conditions. Other international organisations are not eligible to receive funding, unless provided for in the specific call/topic conditions, or if their participation is considered essential for implementing the action by the granting authority.
- Joint Research Centre (JRC)— Where provided for in the specific call conditions, applicants may include in their proposals the possible contribution of the JRC but the JRC will not participate in the preparation and submission of the proposal. Applicants will indicate the contribution that the JRC could bring to the project based on the scope of the topic text. After the evaluation process, the JRC and the consortium selected for funding may come to an agreement on the specific terms of the participation of the JRC. If an agreement is found, the JRC may accede to the grant agreement as beneficiary requesting zero funding or participate as an associated partner, and would accede to the consortium as a member.
- Associations and interest groupings — Entities composed of members (e.g. European research infrastructure consortia (ERICs)) may participate as ‘sole beneficiaries’ or ‘beneficiaries without legal personality’. However, if the action is in practice implemented by the individual members, those members should also participate (either as beneficiaries or as affiliated entities, otherwise their costs will NOT be eligible.
- EU restrictive measures — Entities subject to EU restrictive measures under Article 29 of the Treaty on the European Union (TEU) and Article 215 of the Treaty on the Functioning of the EU (TFEU) as well as Article 75 TFEU, are not eligible to participate in any capacity, including as beneficiaries, affiliated entities, associated partners, third parties giving in-kind contributions, subcontractors or recipients of financial support to third parties (if any).
- Legal entities established in Russia, Belarus, or in non-government controlled territories of Ukraine — Given the illegal invasion of Ukraine by Russia and the involvement of Belarus, there is currently no appropriate context allowing the implementation of the actions foreseen in this programme with legal entities established in Russia, Belarus, or in non-government controlled territories of Ukraine. Therefore, even where such entities are not subject to EU restrictive measures, such legal entities are not eligible to participate in any capacity. This includes participation as beneficiaries, affiliated entities, associated partners, third parties giving in-kind contributions, subcontractors or recipients of financial support to third parties (if any). Exceptions may be granted on a case-by-case basis for justified reasons.
With specific regard to measures addressed to Russia, following the adoption of the Council Regulation (EU) 2024/1745 of 24 June 2024 (amending Council Regulation (EU) No 833/2014 of 31 July 2014) concerning restrictive measures in view of Russia’s actions destabilising the situation in Ukraine, legal entities established outside Russia but whose proprietary rights are directly or indirectly owned for more than 50% by a legal person, entity or body established in Russia are also not eligible to participate in any capacity. - Measures for the protection of the Union budget against breaches of the principles of the rule of law in Hungary — Following the Council Implementing Decision (EU) 2022/2506, as of 16 December 2022, no legal commitments can be entered into with Hungarian public interest trusts established under the Hungarian Act IX of 2021 or any entity they maintain. Affected entities may continue to apply to calls for proposals and can participate without receiving EU funding, as associated partners, if allowed by the call conditions. However, as long as the Council measures are not lifted, such entities are not eligible to participate in any funded role (beneficiaries, affiliated entities, subcontractors, recipients of financial support to third parties, etc.).In case of multi-beneficiary grant calls, applicants will be invited to remove or replace that entity in any funded role and/or to change its status into associated partner. Tasks and budget may be redistributed accordingly.
other eligibility criteria
In order to achieve the expected outcomes, and safeguard the Union’s strategic assets, interests, autonomy, and security, it is important to avoid a situation of technological dependency on a non-EU source, in a global context that requires the EU to take action to build on its strengths, and to carefully assess and address any strategic weaknesses, vulnerabilities and high-risk dependencies which put at risk the attainment of its ambitions. For this reason, participation is limited to legal entities established in Member States, Iceland and Norway and the following additional associated countries: Canada, Israel, the Republic of Korea, New Zealand, Switzerland, and the United Kingdom.
For the duly justified and exceptional reasons listed in the paragraph above, in order to guarantee the protection of the strategic interests of the Union and its Member States, entities established in an eligible country listed above, but which are directly or indirectly controlled by a non eligible country or by a non-eligible country entity, may not participate in the action unless it can be demonstrated, by means of guarantees positively assessed by their eligible country of establishment, that their participation to the action would not negatively impact the Union’s strategic assets, interests, autonomy, or security. Entities assessed as high risk suppliers of mobile network communication equipment within the meaning of ‘restrictions for the protection of European communication networks’ (or entities fully or partially owned or controlled by a high-risk supplier) cannot submit guarantees.
Additional information
Topics
Relevance for EU Macro-Region
EUSDR - EU Strategy for the Danube Region, EUSBSR - EU Strategy for the Baltic Sea Region, EUSALP - EU Strategy for the Alpine Space, EUSAIR - EU Strategy for the Adriatic and Ionian Region
UN Sustainable Development Goals (UN-SDGs)
Additional Information
Applications must be submitted electronically via the Funders & Tenders Portal electronic submission system (accessible via the topic page in the Search Funding & Tenders section). Paper submissions are NOT possible.
Applications must be submitted using the forms provided inside the electronic submission system (not the templates available on the topic page, which are only for information). The structure and presentation must correspond to the instructions given in the forms.
Applications must be complete and contain all parts and mandatory annexes and supporting documents.
The application form will have two parts:
- Part A (to be filled in directly online) contains administrative information about the applicant organisations (future coordinator and beneficiaries and affiliated entities), the summarised budget for the proposal and call-specific questions;
- Part B (to be downloaded from the Portal submission system, completed and then assembled and re-uploaded as a PDF in the system) contains the technical description of the project.
Annexes and supporting documents will be directly available in the submission system and must be uploaded as PDF files (or other formats allowed by the system).
The limit for a full application (Part B) is 45 pages.
Activities are expected to start at TRL 3-4 and achieve TRL 5-6 by the end of the project
Call documents
Horizon Europe Work Programme 2025 Cluster 4 - Digital, Industry and SpaceHorizon Europe Work Programme 2025 Cluster 4 - Digital, Industry and Space(kB)
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