论文标题
大分子中令人兴奋的超平衡状态通过轻泵
Exciting out-of-equilibrium states in macromolecules through light pumping
论文作者
论文摘要
在本文中，我们解决了蛋白质吸收的光的能量下调到其内部振动模式中的问题。我们认为光受体是荧光团自然共表达的情况，或者人为地共价与其某些氨基酸结合。在最近的工作中[物理学。 Rev. X 8，031061（2018）]，经过实验发现，通过在连接到蛋白质上的荧光团上发光，可以将馈入的能量引导到其振动最低频率的正常模式中，从而使蛋白质的亚基相干地振荡。即使在理论上解释了声子冷凝现象，第一步 - 从电子激发到声子激发的能量转移 - 已经打开了。目前的工作旨在填补这一空白。
In the present paper we address the problem of the energy downconversion of the light absorbed by a protein into its internal vibrational modes. We consider the case in which the light receptors are fluorophores either naturally co-expressed with the protein or artificially covalently bound to some of its amino acids. In a recent work [Phys. Rev. X 8, 031061 (2018)], it has been experimentally found that by shining a laser light on the fluorophores attached to a protein the energy fed to it can be channeled into the normal mode of lowest frequency of vibration thus making the subunits of the protein coherently oscillate. Even if the phonon condensation phenomenon has been theoretically explained, the first step - the energy transfer from electronic excitation into phonon excitation - has been left open. The present work is aimed at filling this gap.
