g2-Zero

g2-Zero, established in 2020 and headquartered in Madrid, Spain, operates within the quantum technology sector, specifically focusing on semiconductor production. The company is developing quantum light sources intended for critical applications such as quantum key distribution (QKD), quantum computing, and quantum sensing.

The core of g2-Zero's business is the creation of single photon sources that are distinguished by being purely electrical, alignment-free, and resistant to vibrations. This technology is based on quantum-dot photon sources embedded in quantum semiconductor devices. A key feature is their design for integrability with essential quantum infrastructures, including fiber-optics and photonic integrated circuits, enhancing their robustness and practicality for real-world deployment.

Operating on a business-to-business (B2B) model, g2-Zero targets entities within the climate tech, green tech, cybersecurity, manufacturing, and govtech industries. The firm has secured funding from investors including the Defence Innovation Accelerator for the North Atlantic (DIANA), FI Nvest, and Hamamatsu Corporate Venture Capital. Pitchbook data from April 2024 indicates the company has raised $532K, including a $193K accelerator round to facilitate product development. Another source reports a pre-seed funding amount of $108.1k.

Keywords: quantum light sources, single photon sources, quantum key distribution, QKD, quantum computing, quantum sensing, quantum technology, semiconductor devices, photonic integrated circuits, quantum dots, deep tech, B2B technology, Madrid startup, DIANA accelerator