QphoX — vendor dossier

QphoX

NetworkingEnabling supply chain
Q

TU Delft spin-out (Kavli Institute of Nanoscience) building piezo-optomechanical microwave-to-optical transducers — "Quantum Modems" that interface superconducting qubits with telecom-band optical fibre. Founded in 2020 by Simon Gröblacher, Robert Stockill, and Frederick Hijazi. Demonstrated the first optical readout of a superconducting qubit with Rigetti and Qblox in February 2025 (Nature Physics) and won a USD 5.8M three-year AFRL contract with Rigetti later that year. Launched the Quantum Transducer as a commercial product in March 2026 with IBM named as first partner for distributed-quantum-computing testing.

HQ
Delft, Netherlands
Founded
2020
Status
private
Last verified
Wed May 20 2026 08:00:00 GMT+0800 (Singapore Standard Time)

Timeline

2020202120222023202420252026202720282029today
2020
QphoX founded as a TU Delft spin-out by Simon Gröblacher, Robert Stockill, and Frederick Hijazi
2021-05
€2M seed round led by Quantonation with Speedinvest, High-Tech Gründerfonds, and Delft Enterprises
2023-10
arXiv:2310.06026 — Optical readout of a superconducting qubit using a scalable piezo-optomechanical transducer (published in Nature Physics, 2025)
2024-01
€8M Series A led by QDNL Participations; EIC Fund, Quantonation, Speedinvest, HTGF, and Delft Enterprises participated
2025-02
QphoX, Rigetti and Qblox report optical readout of a superconducting qubit via the piezo-optomechanical transducer (Nature Physics, 2025)
2025-09
Rigetti + QphoX awarded $5.8M AFRL contract (3 years) to develop multi-channel optical readout of superconducting qubits
2026-03
Quantum Transducer launched as a commercial product; IBM named as first partner for distributed-quantum-computing testing with its Quantum Networking Unit
shipped milestone public roadmap

Current flagship

Quantum Transducer — piezo-optomechanical microwave-to-optical transducer (commercial as of March 2026)

Milestones

  1. 2026-03
    Quantum Transducer launched as a commercial product; IBM named as first partner for distributed-quantum-computing testing with its Quantum Networking Unit
    Networking press source ↗
  2. 2025-09
    Rigetti + QphoX awarded $5.8M AFRL contract (3 years) to develop multi-channel optical readout of superconducting qubits
    Networking press source ↗
  3. 2025-02
    QphoX, Rigetti and Qblox report optical readout of a superconducting qubit via the piezo-optomechanical transducer (Nature Physics, 2025)
    Enabling supply chain press source ↗
  4. 2024-01
    €8M Series A led by QDNL Participations; EIC Fund, Quantonation, Speedinvest, HTGF, and Delft Enterprises participated
    Enabling supply chain press source ↗
  5. 2023-10
    arXiv:2310.06026 — Optical readout of a superconducting qubit using a scalable piezo-optomechanical transducer (published in Nature Physics, 2025)
    Enabling supply chain paper source ↗
  6. 2021-05
    €2M seed round led by Quantonation with Speedinvest, High-Tech Gründerfonds, and Delft Enterprises
    Enabling supply chain press source ↗
  7. 2020
    QphoX founded as a TU Delft spin-out by Simon Gröblacher, Robert Stockill, and Frederick Hijazi
    Enabling supply chain web source ↗

Roadmap

No public roadmap recorded.

Capability details

Networking

Role
transducer
Products
Quantum Modem, Quantum Transducer
5 unverified fields
  • modalities.network.role
  • revenue
  • headcount
  • shareholders — QphoX is private; no equity percentages disclosed. Holder list compiled from announced round participation.
  • roadmap — No public multi-year roadmap; near-term direction set by IBM and AFRL/Rigetti contracts.

People

  • Simon Gröblacher — CEO & Co-founder (since 2020) ↗
  • Robert Stockill — CTO & Co-founder (since 2020) ↗
  • Frederick Hijazi — Co-founder (since 2020) ↗

References