To solve the problem of low efficiency of entanglement distribution caused by quantum information easily lost in quantum channels,quantum switch was proposed to transmit quantum information.Considering the information trans-mission capacity of quantum switch,an adaptive entanglement distribution protocol with quantum switch was proposed and two-way entanglement distribution capacity with quantum switch was correspondingly derived.Then the tighter up-per bound of channel capacity was derived by using teleportation simulation of quantum channel,the tighter lower bound was derived on the basis of Hash inequality.Simulation result shows that the lower bound of channel capacity in the pro-posed method generally surpasses the upper bound of which in the traditional quantum channel,providing a feasible thought for delivering high-rate quantum information.
关键词
量子开关/两步纠缠分发容量/纠缠相对熵/相干信息
Key words
quantum switch/two-way entanglement distribution capacity/relative entropy of entanglement/coherent in-formation
维普
万方数据