Coherent state transfer between an electron and nuclear spin in (15)N@C(60).
Coherent state transfer between an electron and nuclear spin in (15)N@C(60).
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DOI：
10.1103/physrevlett.106.110504
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发表时间：
2010-11
影响因子：
8.6
通讯作者：
Richard M. Brown;A. Tyryshkin;Kyriakos Porfyrakis;E. Gauger;B. Lovett;A. Ardavan;S. Lyon;G. Briggs;J. Morton
中科院分区：
文献类型：
--
作者：
Richard M. Brown;A. Tyryshkin;Kyriakos Porfyrakis;E. Gauger;B. Lovett;A. Ardavan;S. Lyon;G. Briggs;J. Morton
分子系统中的电子自旋量子比特提供了高再现性和自组装成更大架构的能力。然而，相邻量子比特之间的相互作用是“永远开启”的，尽管电子自旋相干时间可以是几百微秒，但仍然比核自旋的典型时间短得多。在这里，我们实现了一个电子-核混合方案，该方案使用电子和核自旋自由度之间的相干转移，以便有效地打开或关闭偶极相互作用介导的量子位间耦合，并受益于长的核自旋退相干时间（T（2n））。我们在（15）N@C（60）中，利用一系列调谐的微波和射频脉冲，以88%的双向过程保真度在电子和（15）N核自旋之间转移量子比特态，并测量了超过100 ms的核自旋相干寿命。
Electron spin qubits in molecular systems offer high reproducibility and the ability to self-assemble into larger architectures. However, interactions between neighboring 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 effectively turn on or off interqubit coupling mediated by dipolar interactions and benefit from the long nuclear spin decoherence times (T(2n)). We transfer qubit states between the electron and (15)N nuclear spin in (15)N@C(60) with a two-way process fidelity of 88%, using a series of tuned microwave and radio frequency pulses and measure a nuclear spin coherence lifetime of over 100 ms.