使用液晶溶剂的核磁共振量子计算
Nuclear Magnetic Resonance Quantum Computing Using Liquid Crystal Solvents
摘要：
液晶作为用于核磁共振量子计算（NMRQC）的分子的溶剂提供了几个优点。在由液晶定向的分子的NMR谱中显示的核自旋之间的偶极耦合允许时钟频率的显著增加，而短的自旋-晶格弛豫时间允许算法的快速循环，并且节省校准和信号增强实验的时间。此外，液晶溶剂的使用以适合于NMRQC的自旋承载分子的扩展库的形式提供了可扩展性。这些想法被证明与成功执行的2-qubit格罗弗搜索使用分子（$^{13}$ C $^{1}$ HCl $_3$）在液晶和时钟速度比在各向同性溶剂中大8倍。也许更重要的是，使用液晶溶剂可以在相干时间内执行五倍的逻辑运算。
英文摘要：
Liquid crystals offer several advantages as solvents for molecules used for nuclear magnetic resonance quantum computing (NMRQC). The dipolar coupling between nuclear spins manifest in the NMR spectra of molecules oriented by a liquid crystal permits a significant increase in clock frequency, while short spin-lattice relaxation times permit fast recycling of algorithms, and save time in calibration and signal-enhancement experiments. Furthermore, the use of liquid crystal solvents offers scalability in the form of an expanded library of spin-bearing molecules suitable for NMRQC. These ideas are demonstrated with the successful execution of a 2-qubit Grover search using a molecule ($^{13}$C$^{1}$HCl$_3$) oriented in a liquid crystal and a clock speed eight times greater than in an isotropic solvent. Perhaps more importantly, five times as many logic operations can be executed within the coherence time using the liquid crystal solvent.
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