Nuclear magnetic resonance for quantum computing: Techniques and recent achievements

Rapid developments in quantum information processing have been made, and remarkable achievements have been obtained in recent years, both in theory and experiments. Coherent control of nuclear spin dynamics is a powerful tool for the experimental implementation of quantum schemes in liquid and solid nuclear magnetic resonance(NMR) system,especially in liquid-state NMR. Compared with other quantum information processing systems, the NMR platform has the advantages such as the long coherence time, the precise manipulation, and well-developed quantum control techniques,which make it possible to accurately control a quantum system with up to 12-qubits. Extensive applications of liquid-state NMR spectroscopy in quantum information processing such as quantum communication, quantum computing, and quantum simulation have been thoroughly studied over half a century. This article introduces the general principles of NMR quantum information processing, and reviews the new-developed techniques. The review will also include the recent achievements of the experimental realization of quantum algorithms for machine learning, quantum simulations for high energy physics, and topological order in NMR. We also discuss the limitation and prospect of liquid-state NMR spectroscopy and the solid-state NMR systems as quantum computing in the article.     

暹罗鳄多肽粉对小鼠机体免疫力及抗疲劳效应的增强作用

为研究暹罗鳄(Crocodylus siamensis)多肽粉对小鼠免疫力及抗疲劳效应的影响,对小鼠的免疫力及相关血清指标、运动能力及相关酶活力指标进行了测定.实验结果显示:暹罗鳄多肽粉可以促进小鼠胸腺和脾脏的生长,增强机体免疫力.相对于对照组小鼠,暹罗鳄多肽粉组小鼠血清中的白蛋白、总蛋白、血钙含量升高(p0.05),谷丙转氨酶活力和血糖浓度下降(p0.05).小鼠爬杆及负重游泳实验发现服用了暹罗鳄多肽粉的小鼠垂直爬杆时间和负重游泳时间均长于对照组(p0.05).进一步通过建立小鼠力竭游泳模型研究了暹罗鳄多肽粉的抗疲劳功效,结果显示与对照组相比,暹罗鳄多肽粉组小鼠血液中尿素氮和乳酸的含量以及乳酸脱氢酶活力均降低(p0.05),而超氧化物歧化酶活力升高(p0.05).综上结果表明暹罗鳄多肽粉可能有保肝降糖、增强机体免疫力及抗疲劳效应的作用.     

袋鼠皮多肽对H_2O_2诱导人肝细胞LO2氧化损伤的影响

为探索袋鼠皮多肽如何修复受H_2O_2损伤的人肝细胞LO2,通过建立H_2O_2诱导LO2细胞氧化损伤模型,研究袋鼠皮多肽对氧化应激损伤的LO2细胞的修复作用.结果表明:袋鼠皮多肽在0～0.5μg/μL质量浓度范围内不仅对LO2细胞活性没有抑制作用而且显著提高了受损细胞的存活率,改善了细胞的形态;与此同时,显著降低了H2O2诱导的丙二醛和蛋白质羰基含量,减少了活性氧的累积.综上结果可见袋鼠皮多肽能减小细胞的氧化损伤,有望用于新的功能性食品和护肤产品.