利用囚禁在双边光学微腔内的量子点自旋的辅助,我们提出了一个对于未知较少纠缠态的纠缠浓缩协议。该方案利用了自避错机制来克服局域计算错误,它对于实验缺陷具有内禀的鲁棒性。我们讨论了这个纠缠浓缩协议在当前实验参数下的表现,结果表明这个方案单次执行成功概率可以达到45％。这个纠缠浓缩协议可以作为一个对未来的量子通信和量子网络具有前景的基础构件。

We present an entanglement concentration protocol (ECP) for unknown less-entangled states resorting to the quantum-dot spins in double-sided optical microcavities.The protocol exploits an error-detected mechanism to overcome local computational errors,which is intrinsically robust to experimental imperfections and more practical than previous ECPs for QDs.We discuss the performance of the ECP with current experimental parameters,and the results show a success probability of 45％ for the present scheme without recycling can be achieved.The ECP could provide a promising building block for solid-state quantum repeaters and quantum networks in the future.