Single-photon processor

• Subject Area: Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
• Term: Funded in 2018
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 404423691

The single-photon processor will allow us to realize a series of experiments using single photons. lt will make it possible to a) generate single photons with high efficiency, b} to coherently control them with high accuracy and long-term stability, and c) to measure and detect them with the highest efficiency. The single-photon processor combines a number of components which can be clustered into three categories. Photon generation and preparation: integrated waveguided photon sources will allow us to generate efficiently indistinguishable single photons which allow low-loss coupling into single-mode fibres for dlstribution in quantum networks. Photon manipulation: waveguided quantum circuits will enable us to manipulate quantum Information, and to generate highly entangled stetes suited for quantum tasks. Photon analysis and detection: highly efficient superconducting detectors will enable us to detect the single photons with > 90% efficiency. Only the combination of the components altogether makes the single-photon processor fully functional. The single-photon processor will thus put us in a position to develop new quantum technology and use it for quantum-information processing applications. lt will enable us to perform experiments ranging from applied quantum technologies such as quantum computing, quantum networks, quantum metrology to the very foundations of physics.

• DFG Programme: Major Research Instrumentation
• Major Instrumentation: Single-photon processor
• Instrumentation Group: 5240 Photonenzähler, Quantenphotometer
• Applicant Institution: Universität Stuttgart
• Leader: Professorin Dr. Stefanie Barz