# Program Solicitation: Heterogeneous Architectures for Quantum (HARQ)

Canonical: https://abierto.us/opportunities/darpaps2531

- Solicitation number: DARPA-PS-25-31
- Notice type: Solicitation
- Status: Closed. Deadline was November 7, 2025
- Department: Department of Defense
- Agency: Defense Advanced Research Projects Agency
- Contracting office: Def Advanced Research Projects Agcy (HR0011)
- NAICS: 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- Product or service code: AC12 National Defense R&D Services; Department Of Defense - Military; Applied Research
- First posted: August 7, 2025
- Last posted: October 24, 2025
- SAM.gov: https://sam.gov/workspace/contract/opp/967cd8f4c3554b448d7ba3325ed99de2/view

## Description

The Defense Advanced Research Projects Agency (DARPA) is soliciting proposals towards the realization of heterogeneous quantum computing architectures. Proposed research should investigate innovative approaches that enable revolutionary advances in theory, devices, and system concepts for quantum interconnects, quantum circuit compilers, distributed algorithms, resource estimation, quantum memory/repeater devices, quantum frequency converters, microwave-to-optical transducers, and other elements at the intersection of hardware and software in the quantum computing stack. Specifically excluded is research that primarily results in evolutionary improvements to the existing state of practice.

## Publications

- August 7, 2025: Solicitation, due October 14, 2025. Notice 944007d554364a1aad811469028a7e73. https://sam.gov/workspace/contract/opp/944007d554364a1aad811469028a7e73/view
- August 14, 2025: Solicitation, due October 14, 2025. Notice 431026362b944c459ae715073fd52822. https://sam.gov/workspace/contract/opp/431026362b944c459ae715073fd52822/view
- August 15, 2025: Solicitation, due October 14, 2025. Notice 478382fffc1943d3bf2b532f9e8b5190. https://sam.gov/workspace/contract/opp/478382fffc1943d3bf2b532f9e8b5190/view
- August 15, 2025: Solicitation, due October 14, 2025. Notice cd3003b8585342f5bd32f33875000502. https://sam.gov/workspace/contract/opp/cd3003b8585342f5bd32f33875000502/view
- August 22, 2025: Solicitation, due October 14, 2025. Notice ad9dd138e7d9455dbda77ca46a33accb. https://sam.gov/workspace/contract/opp/ad9dd138e7d9455dbda77ca46a33accb/view
- August 26, 2025: Solicitation, due October 14, 2025. Notice 25dc438812db4e639f2bacde4e427def. https://sam.gov/workspace/contract/opp/25dc438812db4e639f2bacde4e427def/view
- September 10, 2025: Solicitation, due October 14, 2025. Notice 46169167d10843f8b78831e69e4448ba. https://sam.gov/workspace/contract/opp/46169167d10843f8b78831e69e4448ba/view
- September 10, 2025: Solicitation, due October 14, 2025. Notice 6cbeb465524b4fe494403e10377ff4b9. https://sam.gov/workspace/contract/opp/6cbeb465524b4fe494403e10377ff4b9/view
- September 18, 2025: Solicitation, due November 3, 2025. Notice b83c99974f0647e38cd6473292eda45c. https://sam.gov/workspace/contract/opp/b83c99974f0647e38cd6473292eda45c/view
- October 17, 2025: Solicitation, due November 7, 2025. Notice 10a2549323c74f2fa3ca0292d6db2220. https://sam.gov/workspace/contract/opp/10a2549323c74f2fa3ca0292d6db2220/view
- October 20, 2025: Solicitation, due November 7, 2025. Notice 099570f9e80e478a8967ec7fddd13ac7. https://sam.gov/workspace/contract/opp/099570f9e80e478a8967ec7fddd13ac7/view
- October 24, 2025: Solicitation, due November 7, 2025. Notice 967cd8f4c3554b448d7ba3325ed99de2. https://sam.gov/workspace/contract/opp/967cd8f4c3554b448d7ba3325ed99de2/view

## Points of contact

- PS Coordinator, HARQ@darpa.mil

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Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/darpaps2531.