arXivDaily arXiv每日学术速递 周一至周五更新
看起来今天可以划水了
arXiv 1502.00671physics.bio-phquant-ph
收藏

自由基对机制和鸟类化学罗盘:量子相干性和纠缠

The Radical Pair Mechanism and the Avian Chemical Compass: Quantum Coherence and Entanglement

Yiteng Zhang, Gennady P. Berman, Sabre Kais

摘要:

我们回顾了自旋自由基对机制,这是一个很有前途的解释鸟类导航。该机制基于产物产率对(1)涉及电子自旋和邻近核自旋的超精细相互作用和(2)地磁场的强度和方向的依赖性。一个令人惊讶的结果是,即使在环境条件下,电子自旋的量子纠缠也可以在鸟类的磁感受中发挥重要作用。本文综述了单重态和三重态前体产生的自由基对的化学反应的一般方案;自由基对的自旋动力学;自由基对机制引起的产物产率的磁场依赖性。综述的主要部分包括对鸟类化学罗盘的描述。我们回顾:鸟类罗盘的一般性质;自由基对机制的基本方案;隐花色素中的反应动力学;鸟类罗盘中的量子相干性和纠缠;以及噪声的影响。我们相信“量子鸟类罗盘”可以在鸟类导航中发挥重要作用,也可以为新一代灵敏和选择性磁传感纳米器件提供基础。

英文摘要:

We review the spin radical pair mechanism which is a promising explanation of avian navigation. This mechanism is based on the dependence of product yields on (1) the hyperfine interaction involving electron spins and neighboring nuclear spins and (2) the intensity and orientation of the geomagnetic field. One surprising result is that even at ambient conditions quantum entanglement of electron spins can play an important role in avian magnetoreception. This review describes the general scheme of chemical reactions involving radical pairs generated from singlet and triplet precursors; the spin dynamics of the radical pairs; and the magnetic field dependence of product yields caused by the radical pair mechanism. The main part of the review includes a description of the chemical compass in birds. We review: the general properties of the avian compass; the basic scheme of the radical pair mechanism; the reaction kinetics in cryptochrome; quantum coherence and entanglement in the avian compass; and the effects of noise. We believe that the "quantum avian compass" can play an important role in avian navigation and can also provide the foundation for a new generation of sensitive and selective magnetic-sensing nano-devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑