论文标题
旋转链中的多部分纠缠转移
Multipartite entanglement transfer in spin chains
论文作者
论文摘要
我们研究了真正的多部分纠缠在与最接近邻居XX型相互作用的自旋1/2链中的转移。我们专注于扰动状态，其中旋转块在量子线的每个边缘弱耦合，分别体现了多Quipit发件人和接收器的作用。我们发现，高质量的多方纠缠转移是在将三个激发转移到链的相对边缘的同时实现的。此外，我们发现有限的同意和三方负面性在更短的时间内实现，这使GHz-DiStillation方案可行。最后，我们研究了方案在非扰动耦合方面的鲁棒性和量子线长度的增加。
We investigate the transfer of genuine multipartite entanglement across a spin-1/2 chain with nearest-neighbor XX-type interaction. We focus on the perturbative regime, where a block of spins is weakly coupled at each edge of a quantum wire, embodying the role of a multiqubit sender and receiver, respectively. We find that high-quality multipartite entanglement transfer is achieved at the same time that three excitations are transferred to the opposite edge of the chain. Moreover, we find that both a finite concurrence and tripartite negativity is attained at much shorter time, making GHZ-distillation protocols feasible. Finally, we investigate the robustness of our protocol with respect to non-perturbative couplings and increasing lengths of the quantum wire.
