Effect of the Time Delay between Spin State Preparation and Measurement on Electron Spin Teleportation in a Covalent Donor–Acceptor–Radical System
Effect of the Time Delay between Spin State Preparation and Measurement on Electron Spin Teleportation in a Covalent Donor–Acceptor–Radical System
复制标题
自旋态准备和测量之间的时间延迟对共价供体-受体-自由基系统中电子自旋隐形传态的影响
DOI：
10.1021/acs.jpclett.1c03780
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Wasielewski, Michael R.
中科院分区：
文献类型：
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作者：
Bancroft, Laura;Qiu, Yunfan;Krzyaniak, Matthew D.;Wasielewski, Michael R.
我们最近演示了共价供体-受体-自由基（D-A-R•）系统中电子自旋态的光驱动量子隐形传态。在用微波脉冲对 R• 进行特定的自旋态制备后，A 的光激发导致两步电子转移，产生 D•+–A–R–，其中 R• 上的自旋态传送到 D•+。这项研究研究了自旋态准备和光引发隐形传态之间改变时间（τD）的影响。使用脉冲电子顺磁共振波谱，隐形传态产生的 D•+ 自旋回波显示出阻尼振荡作为 τD 的函数，该阻尼振荡是使用密度矩阵模型进行模拟的，这提供了对回波行为的基本理解。隐形传态保真度计算还显示了由于 ⟨Sx⟩ 和 ⟨Sy⟩ 之间相位因子的累积而导致的振荡行为作为 τD 的函数。了解分子系统中量子隐形传态固有的实验参数对于利用这种现象进行量子信息应用至关重要。
We recently demonstrated photodriven quantum teleportation of an electron spin state in a covalent donor–acceptor–radical (D–A–R•) system. Following specific spin state preparation on R•with a microwave pulse, photoexcitation of A results in two-step electron transfer producing D•+–A–R–, where the spin state on R•is teleported to D•+. This study examines the effects of varying the time (τD) between spin state preparation and photoinitiated teleportation. Using pulse electron paramagnetic resonance spectroscopy, the spin echo of D•+resulting from teleportation shows a damped oscillation as a function of τDthat is simulated using a density matrix model, which provides a fundamental understanding of the echo behavior. Teleportation fidelity calculations also show oscillatory behavior as a function of τDdue to the accumulation of a phase factor between ⟨Sx⟩ and ⟨Sy⟩. Understanding experimental parameters intrinsic to quantum teleportation in molecular systems is crucial to leveraging this phenomenon for quantum information applications.