分子磁体中的自旋弛豫时间允许量子信息处理吗？
Will spin-relaxation times in molecular magnets permit quantum information processing?
摘要：
利用X波段脉冲电子自旋共振技术，首次报道了分子纳米磁体的本征自旋晶格弛豫时间（$T_1$）和相位相干弛豫时间（$T_2$）.在Cr $_7M$异金属轮中，其中$M$ = Ni和Mn，相位相干弛豫由分子内电子自旋与质子的耦合主导。在氘代样品中，$T_2$在低温下达到3 $μ$，这比自旋操纵的持续时间长几个数量级，满足了在量子信息应用中部署分子纳米磁体的先决条件。
英文摘要：
Using X-band pulsed electron spin resonance, we report the intrinsic spin-lattice ($T_1$) and phase coherence ($T_2$) relaxation times in molecular nanomagnets for the first time. In Cr$_7M$ heterometallic wheels, with $M$ = Ni and Mn, phase coherence relaxation is dominated by the coupling of the electron spin to protons within the molecule. In deuterated samples $T_2$ reaches 3 $μ$s at low temperatures, which is several orders of magnitude longer than the duration of spin manipulations, satisfying a prerequisite for the deployment of molecular nanomagnets in quantum information applications.
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