Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 58: Transport: Poster Session
TT 58.23: Poster
Mittwoch, 9. März 2016, 15:00–18:30, Poster D
Purcell filtering in circuit QED - Markovian and non-Markovian theory — •Dominik Schramm1, Frank Wilhelm1, and Karl-Peter Marzlin2 — 1Universität des Saarlandes, 66123 Saarbrücken, Germany — 2Department of Physics, St. Francis Xavier University, Antigonish, Nova Scotia, B2G 2W5, Canada
In circuit QED the measurement fidelity is limited by the Purcell effect, which means a decay of the qubit state through the resonator into the transmission line. This energy leakage can be suppressed by using a bandpass Purcell filter. We study decoherence effects of a system with a Purcell filter by deriving a master equation for the reduced density matrix. We look at the crossover between resonant and dispersive regime. We study in particular the non-Markovian regime to compare the Purcell filter to other suppression methods.