论文标题
打击量子错误:一种集成的方法
Combating quantum errors: an integrated approach
论文作者
论文摘要
近期量子通信协议不可避免地会因渠道噪音而遭受,这些渠道的噪音主要是通过多方纠缠或复杂的实验技术等资源尝试的。产生多党更高维度的纠缠并不容易。这需要探索可使用当前设备实现的现实解决方案。特别是由于产生多方纠缠状态的困难而激发的动机,在本文中,我们研究了无错误的信息传输,并以最少的要求。为此,我们为通信目的提出了一个新的信息编码方案。编码方案基于以下事实:大多数嘈杂的渠道会留下一些不变的数量。有了这个事实,我们编码这些不变的信息。这些不变是运营商期望值的函数。该信息通过嘈杂的频道不变。相关地,这种方法与其他现有的错误校正方案没有冲突。实际上,如果对逻辑基础状态的选择施加适当的限制,我们已经显示了标准量子误差校正代码如何出现。作为应用程序,为了插图,我们提出了一个量子密钥分布协议和错误免疫信息传输协议。
Near-term quantum communication protocols suffer inevitably from channel noises, whose alleviation has been mostly attempted with resources such as multiparty entanglement or sophisticated experimental techniques. Generation of multiparty higher dimensional entanglement is not easy. This calls for exploring realistic solutions which are implementable with current devices. Motivated particularly by the difficulty in generation of multiparty entangled states, in this paper, we have investigated error-free information transfer with minimal requirements. For this, we have proposed a new information encoding scheme for communication purposes. The encoding scheme is based on the fact that most noisy channels leave some quantities invariant. Armed with this fact, we encode information in these invariants. These invariants are functions of expectation values of operators. This information passes through the noisy channel unchanged. Pertinently, this approach is not in conflict with other existing error correction schemes. In fact, we have shown how standard quantum error-correcting codes emerge if suitable restrictions are imposed on the choices of logical basis states. As applications, for illustration, we propose a quantum key distribution protocol and an error-immune information transfer protocol.