Quantum technologies will require hybrid platforms combining different quantum systems working under optimal conditions. Spins are considered promising quantum memories to be integrated in microwave architectures. However, their integration into quantum architectures requires to efficiently address the spins and also to coherently manipulate them. Protecting spins from decoherence and developing efficient write and reading protocols is also needed. Here we show the generation and the test of several microwave pulse sequences on diluted oxovanadium tetraphenyl porphiryn (VO(TPP)) molecular spin ensembles embedded into planar superconducting microwave resonators. The microwave sequences are generated by an Arbitrary Waveform Generator by Active Technologies, while and heterodyne scheme is used for the detection. In particular we find that, beyond the Hahn echo and the Rabi oscillations, the Carr-Purcell-Meiboom-Gill and the Uhrig Dynamical Decoupling sequences progressively enhance the memory time, making it 3 times longer with only 3 pulses. We then successfully store and retrieve trains of up to 5 small pulses by using a single recovery pulse.
Claudio Bonizzoni, University of Modena on behalf C.N. Rood
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