Fraunhofer Institute for Applied Optics and Precision Engineering IOFOur group specializes in processing quantum information using various photonic degrees of freedom (DOF). We explore high-dimensional encoding by leveraging multiple modes in time, frequency, space, and photon number. We bridge practical applications by addressing challenges such as efficient photon generation and measurement, and by tackling theoretical questions related to the certification of high-dimensional entanglement. By enhancing techniques for photonic control, particularly in high-dimensional systems, we aim to advance applications in quantum communications and improve the performance of photonic quantum algorithms.
Multi-Mode Quantum Photonics
Development of photonic systems for enhanced quantum information processing
Your Partner for Research and Development
We engage in collaborative research that spans the characterization of nonlinear materials and calibration of detector systems, as well as the benchmarking of quantum sources—free-space, all-fiber and on-chip—across various photonic degrees of freedom. Our network includes engineering and theory groups, with close collaboration with the Friedrich-Schiller Universität Jena (FSU). This connection supports the development of theoretical models and innovative quantum protocols that account for non-ideal experimental parameters. Additionally, our expertise in quantum state engineering is strengthened by collaborations among groups in our institute: the OMS department offers compact, semi-integrated designs with free-space, high-quality optics, while the MN department achieves fully integrated photonic resources utilizing state-of-the-art materials.
Our Services and Competencies
Our research focuses on understanding quantum optical phenomena and optimizing quantum state generation across a wide range of applications. We engage in collaborative efforts that span from fundamental investigations to the development of advanced quantum technologies, with our competencies including:
Markets and Applications
Photonic quantum systems represent a pivotal advancement in the global pursuit of future quantum applications. Our research is dedicated to developing essential building blocks for all-photonic, quantum information processing. By collaborating with us, you can engage in pioneering efforts that explore the vast market potential of quantum technologies, positioning yourself at the forefront of this transformative field.
Quantum computing is set to transform problem-solving in areas where classical computers reach their limits, opening up a whole new world of possibilities.
Applications
- Molecular simulation for drug discovery and battery innovation
- Optimization of complex systems such as:
- Traffic and infrastructure
- Portfolio optimization
- Risk analysis
- Use of photons as carriers of quantum information
- Fabrication of photonic circuits
Experimental setup for photonic quantum computing.
Demultiplexer facilitating precise mapping of squeezed light from the time domain to the spatial domain
In the BMFTR-funded project PhoQuant, collaborative efforts from many institutes and companies are focusing on the development and implementation of a scalable photonic quantum computing platform, with a particular emphasis on boson sampling as a near-term demonstration of quantum computational advantage. By using the interference of multiple indistinguishable photons, boson sampling can solve problems that are classically impossible to solve. This promising approach paves the way for even more general-purpose quantum computing.
Our goal is to establish a photonic quantum architecture that supports up to 100 qubits. When achieved, this development will lay the groundwork for solving real-world problems, as mentioned above mentioned. The architecture is being designed with in-house monolithic integration technology and industrial scalability in mind, relying on proven semiconductor manufacturing techniques. Alongside the hardware, application-specific algorithms and protocols for universal quantum computing are being co-developed and made accessible through cloud-based interfaces.
The photonic platform targets quantum advantage in specific tasks such as boson sampling, while also setting the stage for future advances in programmable quantum processors. By bringing together research, start-ups and industrial expertise, this collaboration is at the forefront of quantum hardware development. Given the substantial economic impact projected for the quantum computing sector, PhoQuant will contribute to advancing technological leadership and securing long-term strategic capabilities in the global quantum race.
Your Benefits in Working with Us
The Fraunhofer IOF team is engaged in a discussion on the experimental setup for Gaussian boson sampling.
Partnering with us in the development of innovative processing methods for quantum information science presents numerous advantages. With extensive experience in optics and precision engineering in our institute, we stand at the forefront of photonic quantum technology. Our expertise allows us to harness cutting-edge research to tackle the unique challenges of quantum photonic encoding.
By collaborating with us, you gain access to state-of-the-art facilities, a dedicated team of researchers, and a robust network of industry partnerships. Our connections with leading theorists at FSU and other institutions further enhance the relevance of our quantum systems, as we integrate insights from mathematics, physics, and engineering to identify emerging opportunities in photonic quantum communications and computing.
Together, we can drive advancements that improve efficiency, integration, and reliability, contributing significantly to the future landscape of quantum technology.
Technical Equipment for Quantum Information Processing
Whether for characterization, benchmarking, or testing different technologies, we provide state-of-the-art facilities and a wide range of quantum systems, including:
- Photon pair sources in free-space and on-chip configurations
- Single-pass squeezers and nonlinear interferometers
- PNR detection systems
- Spatial, spectral and temporal mode manipulation at the single photon level
- In-house fabrication of LNOI based photonic chips
The team at Fraunhofer IOF has developed both the optical and electrical connection technology for the LNOI circuits.
