在抗退相干子空间中原子态的隐形传态

Quantum teleportation of atomic state in decoherent-free subspace

为了克服环境对量子隐形传态的影响,提出了1种基于抗退相干子空间的量子隐形传态机制。在这个机制中,利用6bit原子纠缠态作为量子传态的纠缠信道,这样的纠缠态能抵抗环境噪声引起的退纠缠,被传输的1个逻辑比特量子信息编码为抗环境噪声的3bit原子态,分析了这种量子隐形传态机制的特点和实验上实现的可能性。结果表明,量子隐形传态在整个量子传输过程不受环境诱导的振幅衰减噪声和相位衰减噪声的影响,该机制的成功几率为44%。

In order to suppress the influence of the environment on quantum teleportation, a scheme of quantum teleportation was presented based on decoherent-free subspace. In this scheme, a kind of disentanglement-free atomic six- bit state is taken as quantum entanglement channel, and the teleportated one logical qubit quantum information is encoded into three-bit atomic state which can avoid against influence of the environment. The properties of the quantum teleportation scheme and its experimental realization were analyzed. The result shows that the whole teleportation process is immune to amplitude-flip and phase-flip noises induced by the environment and the success probability for this scheme is 44%.