Multiple Quantum Coherences from Hyperfine Transitions in a Vanadium(IV) Complex

详细信息    查看全文

• 作者：Joseph M. Zadrozny ; Jens Niklas ; Oleg G. Poluektov ; Danna E. Freedman
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：November 12, 2014
• 年：2014
• 卷：136
• 期：45
• 页码：15841-15844
• 全文大小：258K
• ISSN：1520-5126

文摘

We report a vanadium complex in a nuclear-spin free ligand field that displays two key properties for an ideal candidate qubit system: long coherence times that persist at high temperature, T₂ = 1.2 渭s at 80 K, and the observation of quantum coherences from multiple transitions. The electron paramagnetic resonance (EPR) spectrum of the complex [V(C₈S₈)₃]^{2鈥?/sup> displays multiple transitions arising from a manifold of states produced by the hyperfine coupling of the S = 1/₂ electron spin and I = 7/₂ nuclear spin. Transient nutation experiments reveal Rabi oscillations for multiple transitions. These observations suggest that each pair of hyperfine levels hosted within [V(C₈S₈)₃]2鈥?/sup> are candidate qubits. The realization of multiple quantum coherences within a transition metal complex illustrates an emerging method of developing scalability and addressability in electron spin qubits. This study presents a rare molecular demonstration of multiple Rabi oscillations originating from separate transitions. These results extend observations of multiple quantum coherences from prior reports in solid-state compounds to the new realm of highly modifiable coordination compounds.}