Florian Ginzel

Jul 2, 2024 | link.aps.org | Chuyao Tong |Florian Ginzel |Annika Kurzmann

The spin degrees of freedom is crucial for the understanding of any condensed matter system. Knowledge of spin-mixing mechanisms is not only essential for successful control and manipulation of spin qubits, but also uncovers fundamental properties of investigated devices and material.

Sep 28, 2023 | link.aps.org | Florian Ginzel |Guido Burkard

We propose a paradigm of multiplexed dispersive qubit measurement performed while the qubits dephase. A Laplace transformation of the time-dependent cavity response allows to separate contributions from multiple qubits coupled to the same resonator mode, thus allowing for simultaneous single-shot readout. With realistic parameters for silicon spin qubits we find a competitive readout fidelity, while the measurement time compares favorably to conventional dispersive readout.

Mar 13, 2023 | link.aps.org | Florian Ginzel |Guido Burkard

Abstract Both quantum transport measurements in the Pauli blockade regime and microwave cavity transmission measurements are important tools for spin-qubit readout and characterization. Based on a generalized input-output theory we derive a theoretical framework to investigate how a double quantum dot (DQD) in a transport setup interacts with a coupled microwave resonator while the current through the DQD is rectified by Pauli blockade.