Quantum nonlocality plays an important role in quantum information and quantum communication. Different from local realism, nonlocality means that multiple bodies can affect each other instantaneously regardless of the distance. The more the systems, the more complex the nonlocal nature. As a useful quantum information resource, nonlocality also has the characteristic of degeneration, that is, nonlocality ability will inevitably be reduced by external influences. Based on such characteristics, through some local operators or distillation protocols, make the correlation stronger is of great significance. In this paper, we propose a distillation protocol which can distill nonlocality in n-Gteenberg-Horne-Zeilinger (n-GHZ) box and we show the effective of this protocol. Besides, we will also give a general construct of n-bit box distillation protocol, which means that it is effective even we use different nonlocality measure formula or other n-bit box.

量子非局域性在量子信息和量子通信中起着重要作用。与局部现实主义不同，非局部性意味着无论距离多远，多个物体都可以瞬间相互影响。系统越多，非本地性就越复杂。作为一种有用的量子信息资源，非局域性还具有变性的特点，即非局域性不可避免地会受到外界影响而降低。基于这样的特性，通过一些本地的操作者或蒸馏协议，使相关性更强具有重要的意义。在本文中，我们提出了一种蒸馏协议，该协议可以蒸馏n-Gteenberg-Horne-Zeilinger（n-GHZ）盒子中的非局部性，并且证明了该协议的有效性。此外，我们还将给出n位盒蒸馏协议的一般构造，