Theoretical Quantum Communication

Prof. Dr. Zahra Raissi
Department for Quantum Technology

Quantum technologies rely on the ability to distribute, process, and protect information in the presence of noise, imperfections, and limited resources. In the Theoretical Quantum Communication Group, we develop the theoretical foundations and practical concepts required for future quantum communication systems, with a particular focus on quantum networks, quantum error correction, and quantum cryptography.

A central theme of our work is the design and characterization of complex quantum resources—from multipartite entanglement, graph states and higher-dimensional quantum systems (qudits) to error-correcting structures and network architectures—that enable quantum communication, computation, and security beyond the capabilities of classical technologies. Our research is carried out in close collaboration with experimental groups and industrial partners in quantum photonics, communication, and quantum technologies.

Research

• Multipartite Entanglement Multipartite entanglement lies at the heart of many quantum technologies. We investigate the structure, classification, and applications of complex entangled states, including graph states and other highly entangled quantum resources.
• Quantum Networks Future quantum networks require new ways of distributing quantum information across many interconnected nodes. We develop resource states, communication protocols, and network architectures that enable scalable, secure, and resource-efficient quantum communication.
• Quantum Error Correction Quantum technologies must operate reliably despite noise and imperfections. We develop quantum error-correcting codes, with particular emphasis on application oriented protocols and resource-efficient implementations for quantum networks.
• Quantum Cryptography Quantum cryptography enables fundamentally new forms of secure communication. We investigate protocols that exploit multipartite entanglement, higher-dimensional quantum systems, and quantum network architectures to achieve security beyond classical limits.

• PhD Position in Quantum Error Correction for Quantum Networks – Apply here
• Student assistant (SHK/SHB) positions in the area of Quantum Graph States, Entanglement and Quantum Computation (please email me if you are interested or have any questions: zahra.raissi@uni-muenster.de
• PhD position in Graph States, Entanglement and Quantum Computation (TV-L E13, 67%, opening in Summer)
• Several postdoctoral positions in Quantum Error Correction and Multipartite Entanglement (TV-L E13, opening in Summer or Autumn)