中文摘要：

提出了用一个五比特Greenberger—Horne—Zeilinger（GHZ）态实现受控远程量子信息凝聚的方案。在该方案中，GHZ态既充当纠缠通道的作用又充当控制者的作用。基于控制者的合作，接收者能成功地恢复原未知量子态所包含的信息。该方案可以成功地推广到有”个控制者的情况，即利用“（n＋4）比特”GHZ态实现有n个控制者的受控远程量子信息浓缩。

英文摘要：

A scheme for remote information concentration via a five-qubit Greenberger-Horne-Zeilinger entangled （GHZ） state is proposed. In this scheme, the GHZ state serves not only the control parameter but also the quantum channel. The receiver can successfully reconstruct the quantum information of a single qubit state, which has been distributed into three spatially separated qubits, depending on the cooperation of a controller without any global op- erations. This scheme can also be generalized to the case with n spatially separated controllers via an （n ＋ 4） - qubit GHZ state.