Photons, space and time : the many ways of quantum walks / Federico Pegoraro ; Erstgutachter: Prof. Dr. Christine Silberhorn, Zweitgutachter: Prof. Dr. Tim Bartley. Paderborn, 2026
Inhalt
- Abstract
- Zusammenfassung
- Introduction
- Fundamentals on quantum walks
- State of the art
- Applications of Quantum Walks
- Implementations of Quantum Walks
- Interest in path- and time-multiplexing
- Quantum Information
- Experimental setups
- Photon Source
- Photon generation via nonlinear optics: Spontaneous Parametric Down Conversion
- SPDC in ppKTP waveguide
- Photon spectrum
- Photon indistinguishability
- Spatial multiplexing setup
- Time multiplexing setup
- Time-multiplexed interferometric scheme
- Active polarization manipulation
- Polarization based time-multiplexed setup
- Setup alignment
- Electronic signals and synchronization
- Polarization tomography setup
- Results
- Path encoded unitary implementations
- Classical and quantum interference
- Single and two photon quantum walks with routing
- Bell state generation and quantum state tomography
- Open system dynamics in multi-particle quantum walks
- Modelling of loss mechanism
- Open dynamics in the photonic network
- Open dynamics in the time-multiplexed setup
- Achievable rates in the time-multiplexed architecture
- Conditioned dynamics
- Entanglement generation in quantum walks
- Towards time-multiplexed gate based quantum computing
- Conclusion and Outlook
- Acknowledgements
- References