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Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 56: Quantum effects: QED II

Q 56.1: Vortrag

Freitag, 21. März 2014, 10:30–10:45, DO26 208

Inducing coherent oscillations between a superconducting resonator and an ensemble of NV spins I. Experiment — •Stefan Putz1, Dmitry Krimer2, Robert Amsüss1, Abhilash Valookaran1, Jörg Schmiedmayer1, Stefan Rotter2, and Johannes Majer11Atominstitut, Vienna University of Technology, Vienna, Austria — 2Institute for Theoretical Physics, Vienna University of Technology, Vienna, Austria

Hybrid quantum systems are promising candidates for robust experiments in cavity quantum electrodynamics and for future technologies involving the processing of quantum information. A particularly attractive system in this respect is realized by strongly coupling an ensemble of spins to a cavity, which enables both the storage and the transfer of quantum information. Here we report on the observation of coherent oscillations between a superconducting resonator in the microwave regime and a large ensemble of diamond nitrogen vacancy (NV) spins deeply in the strong coupling regime. Inhomogeneous broadening in the spin ensemble and its effects on the dynamical behavior are modeled by solving Volterra integral equations as discussed in the subsequent talk. These numerical calculations show good agreement with our experimental results, and underline that a precise knowledge of the inhomogeneous spin distribution is crucial for the understanding of time domain measurements. Furthermore, we show experimentally that a reduction of the coupling strength leads to a transition between non-Markovian and Markovian decay regimes.

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