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B1: Feedback control of open quantum networks
Prof. Dr. Andreas Knorr  Dr. Alexander Carmele
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.