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arXiv 1708.08263quant-phcond-mat.mtrl-sci
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金刚石中硅空位自旋的全光控制

All-optical control of the silicon-vacancy spin in diamond at millikelvin temperatures

Jonas Nils Becker, Benjamin Pingault, David Groß, Mustafa Gündoğan, Nadezhda Kukharchyk, Matthew Markham, Andrew Edmonds, Mete Atatüre, Pavel Bushev, Christoph Becher

摘要:

金刚石中的硅空位中心由于其良好的光学性质和光学可寻址的电子自旋,在量子光子学中提供了有吸引力的机会。在这里,我们结合两者来实现其自旋态的全光相干控制。我们利用这种方法来探索自旋退相效应在杂质丰富的样品超出声子诱导的退相干的限制:采用拉姆齐和哈恩回波技术在12 mK的基础温度,我们确定共振耦合取代氮自旋浴作为限制退相干源的电子自旋。

英文摘要:

The silicon-vacancy center in diamond offers attractive opportunities in quantum photonics due to its favorable optical properties and optically addressable electronic spin. Here, we combine both to achieve all-optical coherent control of its spin states. We utilize this method to explore spin dephasing effects in an impurity-rich sample beyond the limit of phonon-induced decoherence: Employing Ramsey and Hahn-echo techniques at 12mK base temperature we identify resonant coupling to a substitutional nitrogen spin bath as the limiting decoherence source for the electron spin.

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