Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 27: Transport: Quantum Coherence and Quantum Information Systems - Theory 1
(Joint session of HL, MA and TT organized by TT)
TT 27.3: Vortrag
Dienstag, 8. März 2016, 10:00–10:15, H22
Optimization of Quantum Microwave Photodetection for circuit QED applications — •Marius Schöndorf1, Luke C. Govia1,3, Maxim Vavilov2, Robert McDermott2, and Frank K. Wilhelm1 — 1Universität des Saarlandes, Saarbrücken, Deutschland — 2University of Wisconsin, Madison, USA — 3McGill University, Montreal, Canada
Superconducting qubits are a promising candidate architecture for quantum computing and information. Readout of the qubit state is an important step that has to be taken for realising quantum algorithms in experiment. Recently we presented a qubit readout scheme [1] using a device called Jospehson Photomultiplier (JPM) [2]. One main step in this architecture is to read out a light state of a transmission line with the JPM. In this work we present a guide how to tune the different parameters in the experiment to optimize the measurement efficiency. We use Input-Output Theory to look at a continuous driven transmission line as well as various pulse states. Using analytical and numerical mehtods, we calculate conditions on the different parameters to optimize the respective measurement.
L. C. G. Govia et al., PRA 92, 022335 (2015)
Y.-F. Chen et al., PRL 107, 217401 (2012)