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arXiv · 1011.5157

Coherent state transfer between an electron- and nuclear spin in 15N@C60

Richard M. Brown·Alexei M. Tyryshkin·Kyriakos Porfyrakis·Erik M. Gauger·Brendon W. Lovett·Arzhang Ardavan·S. A. Lyon·G. Andrew. D. Briggs·John J. L. Morton
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Abstract

Electron spin qubits in molecular systems offer high reproducibility and the ability to self assemble into larger architectures. However, interactions between neighbouring qubits are 'always-on' and although the electron spin coherence times can be several hundred microseconds, these are still much shorter than typical times for nuclear spins. Here we implement an electron-nuclear hybrid scheme which uses coherent transfer between electron and nuclear spin degrees of freedom in order to both controllably turn on/off dipolar interactions between neighbouring spins and benefit from the long nuclear spin decoherence times (T2n). We transfer qubit states between the electron and 15N nuclear spin in 15N@C60 with a two-way process fidelity of 88%, using a series of tuned microwave and radiofrequency pulses and measure a nuclear spin coherence lifetime of over 100 ms.

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Richard M. Brown, Alexei M. Tyryshkin, Kyriakos Porfyrakis, Erik M. Gauger, Brendon W. Lovett, Arzhang Ardavan, S. A. Lyon, G. Andrew. D. Briggs, John J. L. Morton. 2010-11-24. Coherent state transfer between an electron- and nuclear spin in 15N@C60. https://doi.org/10.1103/physrevlett.106.110504

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