论文标题
基于单个电子旋转和核旋转记忆中的量子repeater在量子点中
Quantum repeaters based on individual electron spins and nuclear-spin-ensemble memories in quantum dots
论文作者
论文摘要
受到量子点核自旋的控制和操纵的最新发展的启发，该量子允许将电子自旋状态转移到周围的核旋转合奏中进行存储，我们提出了一种量子中继器方案，将单个量子点电子旋转和核旋转组合结合在一起，该方案分别用作旋转式插件和量子记忆和量子记忆。我们考虑使用嵌入高共振性光学微腔内的低晶体量子点。量子点核旋转集合允许长期存储纠缠状态，并使用腔体辅助门进行预示的纠缠交换。我们强调了实现我们的量子中继器方案所需的量子点技术的进步，该方案有望在长距离内建立高保真纠缠，分配速率超过了直接传输光子的速度。
Inspired by recent developments in the control and manipulation of quantum dot nuclear spins, which allow for the transfer of an electron spin state to the surrounding nuclear-spin ensemble for storage, we propose a quantum repeater scheme that combines individual quantum dot electron spins and nuclear-spin ensembles, which serve as spin-photon interfaces and quantum memories respectively. We consider the use of low-strain quantum dots embedded in high-cooperativity optical microcavities. Quantum dot nuclear-spin ensembles allow for the long-term storage of entangled states, and heralded entanglement swapping is performed using cavity-assisted gates. We highlight the advances in quantum dot technologies required to realize our quantum repeater scheme which promises the establishment of high-fidelity entanglement over long distances with a distribution rate exceeding that of the direct transmission of photons.
