论文标题
基于分叉的量子退火之间的自旋-1颗粒之间的多部分纠缠产生
Generation of multipartite entanglement between spin-1 particles with bifurcation-based quantum annealing
论文作者
论文摘要
量子退火是解决组合优化问题的一种方法，其中横向场诱导量子波动。最近，建议基于分叉的量子退火与自旋-1颗粒作为实施量子退火的另一种机制。在基于分叉的量子退火中，每种旋转最初都是以$ | 0 \ rangle $制备的，以绝热的方式让该状态通过时间依赖的哈密顿量进化，我们发现在进化结束时$ | \ pm 1 \ rangle $跨越了一个状态。在这里，我们提出了一种通过基于分叉的量子退火来生成旋转1颗粒之间的多部分纠缠的方案，即GHz状态。当我们绝热地改变外部驾驶场的幅度时，我们逐渐减少自旋1颗粒的失沟。由于自旋1颗粒之间的偶极 - 偶极相互作用，我们可以在执行此方案后准备GHz状态。我们通过使用钻石中的氮空位中心讨论我们计划的可能实现。
Quantum annealing is a way to solve a combinational optimization problem where quantum fluctuation is induced by transverse fields. Recently, a bifurcation-based quantum annealing with spin-1 particles was suggested as another mechanism to implement the quantum annealing. In the bifurcation-based quantum annealing, each spin is initially prepared in $|0\rangle$, let this state evolve by a time-dependent Hamiltonian in an adiabatic way, and we find a state spanned by $|\pm 1\rangle$ at the end of the evolution. Here, we propose a scheme to generate multipartite entanglement, namely GHZ states, between spin-1 particles by using the bifurcation-based quantum annealing. We gradually decrease the detuning of the spin-1 particles while we adiabatically change the amplitude of the external driving fields. Due to the dipole-dipole interactions between the spin-1 particles, we can prepare the GHZ state after performing this protocol. We discuss possible implementations of our scheme by using nitrogen vacancy centers in diamond.
