紫色细菌反应中心蛋白质中的光诱导电子自旋量子位连贯性
Jasleen K Bindra1, Jens Niklas1, Yeonjun Jeong1
1Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, USA. oleg@anl.gov.
Physical chemistry chemical physics : PCCP
|January 16, 2025
概括
光合作用反应中心 (RCs) 产生纠的自旋对,这对量子传感至关重要. 细菌RCs的化适度增加了自旋相干时间,但小于预期,受当地环境和甲基团道化的影响.
科学领域:
- 量子生物学 量子生物学
- 生物物理学的生物物理.
- 量子信息科学 量子信息科学
背景情况:
- 光合作用反应中心 (RCs) 对于通过旋转相关的基因对 (SCRPs) 来研究量子纠至关重要.
- 了解SCRP中的自旋连贯性是开发量子传感电子自旋量子比特的关键.
- 细菌RC (bRC) 系统,特别是P865+QA-SCRP,提供了一个探索量子效应的模型.
研究的目的:
- 研究局部分子环境和同位素替代 (代) 对细菌RCs中自旋相干时间 (TM) 的影响.
- 为了比较bRC中的化效应与之前在光系统I (PSI) RC中发现的结果.
- 阐明影响旋转连贯性的机制,例如甲基组动态和蛋白质微环境.
主要方法:
- 使用高频电子偏磁共振 (EPR) 光谱法测量了自旋相干时间.
- 减肥和非减肥bRC样本的比较分析.
- 理论建模以确定有影响力的分子结构和动态.
主要成果:
- 当地环境在很大程度上决定了自旋连贯时间 (TM).
- 化导致TM的适度增加,特别是在低温下,但低于单独通过旋转扩散预测的水平.
- 旋转连贯性显示出强烈依赖外部磁场方向,表明蛋白质微环境的影响.
结论:
- 当地蛋白质环境和特定的分子特征,如甲基组,极大地影响RCs中的自旋连贯性.
- 化对旋转连贯性的影响是复杂的,并且受到超出简单核旋转扩散的因素的影响.
- 结果为优化量子系统设计提供了见解,以提高量子信息科学和传感中的连贯性.
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