通过梯形量子比特链实现无序安全的纠缠传输
Disorder-safe entanglement transfer through ladder qubit chains
AI总结:
本研究针对两腿梯形自旋1/2链的无序纠缠传输问题,提出基于无序保护子空间的高保真态传输方案,发现无序强度提升可抑制子空间信息泄漏、提高传输保真度。
摘要:
我们研究了存在无序情况下,两腿梯形自旋1/2链中的纠缠传输协议。在局域内格点能量与链内耦合近似遵循恒定比例的区域中,我们构建了一种通过无序保护子空间实现高保真度态传输的方案,该子空间内的参数涨落不依赖于由$W$表征的系统全局无序。此外,我们发现随着$W$增大,信息从该子空间的泄漏实际上受到抑制,因此通过链另一端的纠缠并发性评估的传输保真度会随无序强度提升。
英文摘要:
We study an entanglement transfer protocol in a two-leg ladder spin-1/2 chain in the presence of disorder. In the regime where on-site energies and the intrachain couplings follow aproximately constant proportions locally, we set up a scheme for high-fidelity state transfer via a disorder-protected subspace wherein fluctuations in the parameters do not depend on the global disorder of the system, accounted by $W$. Moreover, we find that the leakage of information from that subspace is actually suppressed upon increasing $W$ and thus the transfer fidelity, evaluated through the entanglement concurrence at the other end of the chain, builds up with the disorder strength.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。