Superconducting quantum computers cannot grow past a few thousand qubits in one cryostat. Useful machines need millions. The only path is networking processors over optical fibre - and that requires converting microwave photons to light without destroying their quantum state.
Connecting
Quantum Systems
Q-Bifröst builds the microwave-to-optical link that lets quantum computers scale beyond a single fridge.
Technology
Q-Bifröst holds the key to unlocking Quantum Connectivity
The Problem
The Solution
Microwave-to-optical quantum transducer.
Our electro-optic transducer converts single microwave photons to telecom light, coherently and bidirectionally, targeting >50% efficiency, the threshold where deterministic quantum links become possible.
- Electro-optic whispering-gallery mode resonators
- Microwave resonator design (patent pending)
- Standard telecom fibre between cryostats - no exotic infrastructure
Our development road-map enables
distributed quantum networks at scale.
Phase 1
Microwave to Optical Transduction
Link superconducting processors over fibre
Phase 2
Hybrid Transduction
Bridge superconducting and neutral-atom platforms
Phase 3
Distributed Network
Any platform to any platform, at scale
Q-bifrost builds the best
microwave-to-optical
quantum transducer
About
A team with the technology and expertise to make this a reality.
Based at the University of Otago and Te Whai Ao Dodd-Walls Centre for Photonic and Quantum Technologies
The Dodd-Walls Centre brings together 200 researchers and students from seven institutions. It has a global reputation for quantum photonics, optics and developing Quantum Technologies
Prof. Harald Schwefel
CEO / CSO
co-inventor of electro-optic quantum transduction; 4,000+ citations; Deputy Director Science, Te Whai Ao–Dodd-Walls Centre; PI Quantum Technology Aotearoa
Erica Lloyd
COO / CCO
Erica Lloyd is a leader in deep-tech commercialisation across public and private sectors, including in space component technology and embodied AI. Experienced in capital strategy, IP positioning, global partnerships, regulatory pathways and strategic awareness-building.
Dr. Malika Suresh
Principal Researcher
Researches nonlinear optics, optical micro-resonators, microwave/THz photonics and femtosecond-laser micromachining. Brings expertise in fabrication and nonlinear frequency conversion.
Dr Florian Sedlmeir
CTO
Brings critical technical expertise in whispering gallery mode resonators, nonlinear optics, quantum optics, and quantum transduction.
Contact
Harald Schwefel
harald@qbifrost.com
Erica Lloyd
erica@qbifrost.com
+64 21 806 730
Physical address
Q-Bifröst Ltd
87 Saint David Street,
Dunedin North,
Dunedin 9016
Quantum Computing will open
new frontiers for human kind
Q-Bifröst will make quantum
computing scalable