Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 49: Symposium on Quantum Signatures in Magnetism (SYQS)
(Joint symposium of HL, MA, O and TT organized by MA)

TT 49.4: Hauptvortrag

Mittwoch, 9. März 2016, 16:45–17:15, H1

Hybrid Quantum Systems - Coupling Color Centers to Superconducting Cavities — •Johannes Majer — TU Wien / Atominstitut

Hybrid quantum systems based on spin-ensembles coupled to superconducting microwave cavities are promising candidates for robust experiments in cavity quantum electrodynamics (QED) and for future technologies employing quantum mechanical effects. The main source of decoherence in this systems is inhomogeneous dipolar spin broadening and a full understanding of the complex dynamics is essential and has not been addressed in recent studies yet. We investigate the influence of a non-Lorentzian spectral spin distribution in the strong coupling regime of cavity QED. We show for the first time experimentally how the so-called cavity protection effect influences the decay rate of coherent Rabi oscillation by varying the coupling strength in our experiment. We then demonstrate how the Rabi oscillation amplitude can be enhanced by two orders of magnitude by pulsing the strongly coupled system matching a special resonance condition. Giving a way improving the coherent manipulation of the spin polarization helping to improve fidelity and performance in hybrid quantum systems.