Feedback control of open quantum networks (B01)

• Subject Area: Theoretical Condensed Matter Physics
• Term: from 2011 to 2022
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 163436311

The superposition principle and the corresponding non-classical features introduced by quantum interference are essential to quantum mechanics. In this project, we will theoretically study the possibility to steer quantum interferences via a coherent self-feedback mechanism beyond classical Pyragas control. Our goal is to enhance the probability of specific quantum states and to reduce dissipation in networks consisting of coupled cavities and strongly-correlated emitters or spin-chains. Specifically, we will address phenomena in the few-excitation limit, such as feedback-controlled two-photon emission and reduction or enhancement of the spin-blockade effect in incoherently pumped Heisenberg spin chains.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 910: Control of Self-Organising Non-Linear Systems: Theoretical Methods and Concepts of Application
• Applicant Institution: Technische Universität Berlin
• Project Heads: Dr. Alexander Carmele; Professor Dr. Andreas Knorr