Department of Applied Physics, Eindhoven University of Technology, PO Box 513, Eindhoven, 5600 MB, The Netherlands.
Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, Warsaw, PL-02668, Poland.
Sci Rep. 2018 Jun 18;8(1):9247. doi: 10.1038/s41598-018-27232-4.
Transport of excitations along proteins can be formulated in a quantum physics context, based on the periodicity and vibrational modes of the structures. Numerically exact solutions of the corresponding equations are very challenging to obtain on classical computers. Approximate solutions based on the Davydov ansatz have demonstrated the possibility of stabilized solitonic excitations along the protein, however, experimentally these solutions have never been directly observed. Here we propose an alternative study of biophysical transport phenomena based on a quantum simulator composed of a chain of ultracold dressed Rydberg atoms, which allows for a direct observation of the Davydov phenomena. We show that there is an experimentally accessible range of parameters where the system directly mimics the Davydov equations and their solutions. Moreover, we show that such a quantum simulator has access to the regime in between the small and large polaron regimes, which cannot be described perturbatively.
沿着蛋白质的激发传递可以在量子物理的背景下进行研究，这是基于结构的周期性和振动模式。在经典计算机上获得相应方程的精确数值解是非常具有挑战性的。基于 Davydov 假设的近似解已经证明了沿着蛋白质稳定的孤子激发的可能性，然而，这些解在实验中从未被直接观察到。在这里，我们提出了一种基于由超冷修饰的里德伯原子链组成的量子模拟器的生物物理输运现象的替代研究方法，这使得可以直接观察 Davydov 现象。我们表明，在实验上可以访问的参数范围内，系统直接模拟 Davydov 方程及其解。此外，我们表明，这样的量子模拟器可以访问不能用微扰法描述的小极化子和大极化子之间的区域。
