标题： 通过偶极粒子浴对自旋链的耗散冷却 显示英文标题

标题： Dissipative cooling of spin chains by a bath of dipolar particles

摘要： 我们考虑一个由费米原子组成的自旋链，在光晶格中通过超交换相互作用相互作用。 我们理论研究了当自旋链通过磁偶极-偶极相互作用与由具有强磁矩的原子组成的环境耦合时的耗散演化。 与环境的偶极相互作用允许自旋链的集体自旋发生动态演化。 从一个不相关的热样本出发，我们证明耗散冷却在几秒钟的时间尺度内会产生高度纠缠的低能自旋态。 实际上，由超交换相互作用驱动的最低能量单态被高效地产生。 这种耗散方法是冷却自旋全原子在自旋无关晶格中的有前途的替代方案。 它提供了自旋自由度的直接热化，而传统方法则受到由于超交换相互作用效应下必要的空间自旋再分布所带来的固有长时间尺度的困扰。 显示英文摘要

摘要： We consider a spin chain of fermionic atoms in an optical lattice, interacting with each other by super-exchange interactions. We theoretically investigate the dissipative evolution of the spin chain when it is coupled by magnetic dipole-dipole interaction to a bath consisting of atoms with a strong magnetic moment. Dipolar interactions with the bath allow for a dynamical evolution of the collective spin of the spin chain. Starting from an uncorrelated thermal sample, we demonstrate that the dissipative cooling produces highly entangled low energy spin states of the chain in a timescale of a few seconds. In practice, the lowest energy singlet state driven by super-exchange interactions is efficiently produced. This dissipative approach is a promising alternative to cool spin-full atoms in spin-independent lattices. It provides direct thermalization of the spin degrees of freedom, while traditional approaches are plagued by the inherently long timescale associated to the necessary spatial redistribution of spins under the effect of super-exchange interactions.