187 citations · 1.1k across the 45 of their papers we have counts for
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A quantum optical realization of the Ornstein-Uhlenbeck process via simultaneous action of white noise and feedback
Alexander Carmele, Scott Parkins, Andreas Knorr
We establish an important connection between coherent quantum feedback and the Ornstein-Uhlenbeck process in quantum optics. We show that an emitter with fluctuating energy levels…
A Hahn-Ramsey Scheme for Dynamical Decoupling and DC Magnetometry with Single Solid-State Qubits
Nikola Sadzak, Alexander Carmele, Claudia Widmann +3
Spin systems in solid state materials are promising qubit candidates for quantum information or quantum sensing. A major prerequisite here is the coherence of spin phase oscillatio…
Pronounced non-Markovian features in multiply-excited, multiple-emitter waveguide-QED: Retardation-induced anomalous population trappin
Alexander Carmele, Nikolett Nemet, Victor Canela +1
The Markovian approximation is widely applied in the field of quantum optics due to the weak frequency dependence of the vacuum field amplitude, and in consequence non-Markovian ef…
Revisiting Quantum Feedback Control: Disentangling the Feedback-induced Phase from the Corresponding Amplitude
Kisa Barkemeyer, Regina Finsterhölzl, Andreas Knorr +1
Coherent time-delayed feedback allows the control of a quantum system and its partial stabilization against noise and decoherence. The crucial and externally accessible parameters…
Non-Markovian features in semiconductor quantum optics: Quantifying the role of phonons in experiment and theory
Alexander Carmele, Stephan Reitzenstein
We discuss phonon-induced non-Markovian and Markovian features in QD-based optics. We cover lineshapes in linear absorption experiments, phonon-induced incoherence in the Heitler r…
Comparison between continuous- and discrete-mode coherent feedback for the Jaynes-Cummings model
Nikolett Német, Alexander Carmele, Scott Parkins +1
Using the example of the Jaynes-Cummings model, we present a comparison between time-delayed coherent feedback mediated by reservoirs with continuous and discrete mode structures a…
Stabilizing a discrete time crystal against dissipation
Leon Droenner, Regina Finsterhölzl, Markus Heyl +1
Eigenstate phases such as the discrete time crystal exhibit an inherent instability upon the coupling to an environment, which restores equipartition of energy and therefore acts a…