# Future Program Announcement & Proposers Day: Heterogeneous Architectures for Quantum (HARQ)

Canonical: https://abierto.us/opportunities/darpasn2598

- Solicitation number: DARPA-SN-25-98
- Notice type: Special notice
- Status: Closed. Deadline was August 1, 2025 at 5:00 PM EDT
- 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: July 22, 2025
- Last posted: July 23, 2025
- SAM.gov: https://sam.gov/workspace/contract/opp/17c520213130422a8b9b609550e8082f/view

## Description

DARPA anticipates soliciting innovative proposals towards the realization of heterogeneous quantum computing architectures.

Proposed research would 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 interface of the quantum computing hardware/software stack.

Specifically excluded is research that primarily results in evolutionary improvements to the existing state of practice. See Future Program Details section below. DARPA welcomes feedback on the HARQ program goals, metrics, and scope outlined in Future Program Details section below. Feedback should be emailed to HARQ@darpa.mil no later than July 30, 2025, at 5:00 p.m. ET, after which time DARPA will post the final PS.

DARPA will host a virtual Proposers Day in support of DARPA Program Solicitation (PS) DARPA-PS-25-31 for HARQ on August 8, 2025, via webcast from 11:00 a.m. to 4:00 p.m. ET. DARPA anticipates releasing DARPA-PS-25-31 prior to Proposers Day. See Proposers Day Details section below for additional registration and meeting details.

## Publications

- July 22, 2025: Special notice, due August 1, 2025. Notice e5aea4084d00433f9a93de44c0be8b48. https://sam.gov/workspace/contract/opp/e5aea4084d00433f9a93de44c0be8b48/view
- July 23, 2025: Special notice, due August 1, 2025 at 5:00 PM EDT. Notice 17c520213130422a8b9b609550e8082f. https://sam.gov/workspace/contract/opp/17c520213130422a8b9b609550e8082f/view

## Points of contact

- MTO 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/darpasn2598.