Electrical two-qubit gates within a pair of clock-qubit magnetic molecules
Electrical two-qubit gates within a pair of clock-qubit magnetic molecules
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一对时钟量子位磁性分子内的电双量子位门
DOI：
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发表时间：
2022
影响因子：
7.6
通讯作者：
A. Gaita
中科院分区：
文献类型：
--
作者：
Aman Ullah;Ziqi Hu;Jes'us Cerd'a;Juan Arag'o;A. Gaita
利用时钟跃迁（CTs），增强了HoW 10分子自旋量子比特的相干性。最近有研究表明，在使用ct操作时，可以使用电场选择性地定位在包含两种相同但反转相关的分子的晶体中指向给定方向的10个分子。在此，我们从理论上探讨了利用电场在稀释晶体中两个ct保护的HoW 10分子的偶极耦合产生的2量子位希尔伯特空间内影响纠缠双量子位量子门的可能性。我们估计了t1， t2的热演化，发现从声子的角度来看，ct也是最佳的操作点，并规划了如何组合一系列微波和电场脉冲，以在对称和非对称量子比特状态之间的可切换的两个量子比特操作空间内实现相干控制，这些操作空间既不受自旋浴的影响，也不受声子浴退相干的影响。这种双量子比特门方法在物理刺激和逻辑运算之间提供了一种优雅的对应关系，同时避免了量子比特状态的任何自发的单一演化。最后，我们发现了由两个时钟分子之间的相互作用产生的高度保护的1量子位子空间。
Enhanced coherence in HoW 10 molecular spin qubits has been demonstrated by use of clock-transitions (CTs). More recently it was shown that, while operating at the CTs, it was possible to use an electrical field to selectively address HoW 10 molecules pointing in a given direction, within a crystal that contains two kinds of identical but inversion-related molecules. Herein we theoretically explore the possibility of employing the electric field to effect entangling two-qubit quantum gates within a 2-qubit Hilbert space resulting from dipolar coupling of two CT-protected HoW 10 molecules in a diluted crystal. We estimate the thermal evolution of T 1 , T 2 , find that CTs are also optimal operating points from the point of view of phonons, and lay out how to combine a sequence of microwave and electric field pulses to achieve coherent control within a switchable two-qubit operating space between symmetric and asymmetric qubit states that are protected both from spin-bath and from phonon-bath decoherence. This two-qubit gate approach presents an elegant correspondence between physical stimuli and logical operations, meanwhile avoiding any spontaneous unitary evolution of the qubit states. Finally, we found a highly protected 1-qubit subspace resulting from the interaction between two clock molecules.
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影响因子：
16.6
作者：
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通讯作者：
van Slageren, Joris
影响因子：
4.2
作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
Winpenny, Richard E. P.