3D Quantum Random Walks in Laser-Written Waveguide Structures

• Applicant: Professor Alexander Szameit, Ph.D.
• Subject Area: Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
• Term: from 2019 to 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 413469995

The aim of our proposal is to promote the understanding and control of quantum random walks (QRWs) of correlated and entangled photons on various lattice geometries, with the vision to establish a basis for new, on-chip quantum simulation and computing applications. Our proposal addresses in particular the field of simulating complex quantum systems. Gaining knowledge about fundamental aspects of quantum transport, is essential to understand a variety of elaborate phenomenon in nature like for instance photosynthesis. Along these lines, by enhancing the QRW complexity to three-dimensional lattice geometries a whole new class of networks can be investigated. Besides the possibility to simulate complicated quantum systems the implementation of quantum search algorithms becomes feasible, which will give a tremendous boost in the field of quantum computation. Since the complete project relies on waveguide lattices it benefits from the advantages of integrated quantum-optical devices. With the superior stability and robustness, it is possible to design quantum networks for photonic QRWs that are orders of magnitudes smaller than bulk-optical systems built on an optical table, that work with higher efficiency and fidelity, and that require much less resources for their implementation. In doing so, advanced on-chip quantum computing and simulations becomes capable of real-world applications.

• DFG Programme: Research Grants