Quantum Source
Israeli photonic fault-tolerant quantum-computing company founded in 2021 by Oded Melamed, Gil Semo, Dan Charash, and Barak Dayan (Weizmann Institute quantum optics). Uses single atoms trapped near a photonic chip as both deterministic photon sources and photon-photon gate mediators — designed to produce large photonic graph (resource) states deterministically rather than via the probabilistic linear-optical multiplexing that dominates competing photonic-FTQC roadmaps. Pre-commercial; closed a USD 50M Series A in September 2024 led by Eclipse Ventures, bringing total funding above USD 77M.
Timeline
Current flagship
Atom-mediated photonic graph-state generator — single-atom-on-photonic-chip prototype (pre-commercial)
Milestones
- 2024-09$50M Series A led by Eclipse with Standard Investments, Level VC, Canon Equity and existing investors (Pitango First, Grove Ventures, 10D, Dell Technologies Capital); total funding >$77M
- 2023-04$12M follow-on raise (Pitango First, Grove Ventures, 10D, Dell Technologies Capital)
- 2022-07Out of stealth with a $15M seed round
- 2021Company founded by Oded Melamed, Gil Semo, Dan Charash (semiconductor-industry serial entrepreneurs) and Barak Dayan (Weizmann Institute quantum optics)
Roadmap
- 2026 Scale single-atom-on-photonic-chip system from research demos toward a fault-tolerant photonic processor; Series A capital allocated to engineering hires and commercialisation source ↗
Capability details
Quantum computing
- Qubit type
- photonic
- Physical qubits
- —
- Logical qubits
- 0
- 1Q gate fidelity
- —
- 2Q gate fidelity
- —
- T₁
- —
- T₂
- —
- EC code
- —
- Connectivity
- —
9 unverified fields
-
modalities.qc.physical_qubits_current -
modalities.qc.one_q_fidelity -
modalities.qc.two_q_fidelity -
modalities.qc.coherence_t1_ms -
modalities.qc.coherence_t2_ms -
modalities.qc.ec_code -
modalities.qc.connectivity -
modalities.qc.gate_set -
shareholders— Private company; only round-participation lists are public. Stake percentages undisclosed.
People
References
- paper https://journals.aps.org/prxquantum/ Dayan-group: Atom-mediated deterministic generation and stitching of photonic graph states (PRX Quantum)
- paper https://www.science.org/doi/10.1126/science.1254699 Shomroni et al., All-optical routing of single photons by a one-atom switch (Science, 2014) — foundational Dayan-group result underpinning the deterministic photon-photon gate approach
- press https://www.prnewswire.com/news-releases/quantum-source-raises-50m-series-a-funding-to-make-scalable-useful-quantum-computing-a-reality-302243714.html $50M Series A press release (September 2024)
- press https://thequantuminsider.com/2022/07/04/israel-based-startup-quantum-source-out-of-stealth-with-15m-seed-round/ $15M seed announcement (July 2022)