N@C60 and P@C60 as quantum bits
N@C60 and P@C60 as quantum bits
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N@C60 和 P@C60 作为量子位
DOI：
10.1007/bf03166307
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发表时间：
2004
影响因子：
1
通讯作者：
Alois Weidinger
中科院分区：
文献类型：
--
作者：
C. Meyer;W. Harneit;B. Naydenov;Klaus Lips;Alois Weidinger
由于其长的电子自旋弛豫时间，内嵌富勒烯N@C60和P@C60是在电子自旋量子计算机中实现量子比特的良好候选者。在此上下文中的中心操作是将自旋方向旋转任意角度。在本实验中，这种章动行为进行了研究，在脉冲电子自旋共振测量。我们表明，即使在室温下，约50拉比振荡（约100量子位操作）可以进行没有重新聚焦的自旋系统，虽然存在不均匀性。V族内嵌富勒烯的一个特殊特征是电子自旋S =3/2，这使得章动行为变得复杂。低温下的零场分裂导致（1/2，−1/2）跃迁和（±3/2，±1/2）跃迁的章动频率不同。频率比为2/31/2。
Due to their long electron spin relaxation times, the endohedral fullerenes N@C60 and P@C60 are good candidates for the implementation of qubits in an electron spin quantum computer. A central operation in this context is the rotation of the spin direction by an arbitrary angle. In the present experiment, this nutation behavior was studied in pulsed electron spin resonance measurements. We show that, even at room temperature, about 50 Rabi oscillations (about 100 qubit operations) can be performed without refocusing the spin system, although inhomogeneities are present. A special feature of the group V endohedral fullerenes is the electron spinS=3/2, which complicates the nutation behavior. The zero-field splitting at low temperature gives rise to different nutation frequencies for the (1/2,−1/2) transition and the (±3/2, ±1/2) transitions. The frequency ratio is 2/31/2.