论文标题
量子中继器通过纠缠相位调制的多模连贯状态
Quantum repeater via entangled phase modulated multimode coherent states
论文作者
论文摘要
我们提出了一种量子中继器方案，该方案使用纠缠的多模一相干状态，该状态是通过对称和反对称schrödinger猫态的电声调制获得的。在此方法中，远程各方生成的相位调制状态的子载波模式发送到中央节点的对称梁分离器。纠缠的相干状态是通过光子分离器输出通道处的光子计数测量来制备的。我们研究量子通道中的破坏性的影响如何影响光关统计和相应的保真度。我们展示了建议的方案如何通过使用生成的纠缠来利用量子传送，从而通过子载波编码来扩展量子键分布范围。
We present a scheme of quantum repeater that uses entangled multimode coherent states which are obtained by electro-optic modulation of symmetric and antisymmetric Schrödinger cat states. In this method subcarrier modes of the phase modulated states generated by the remote parties are sent to a symmetric beam splitter at the central node. The entangled coherent states are heraldedly prepared by photon counting measurements at the output channels of the beam splitter. We study how the effects of decoherence in the quantum channel affect statistics of photocounts and corresponding fidelity. We show how the proposed scheme can be useful for extending range of quantum key distribution with sub carrier wave encoding by exploiting quantum teleportation with the generated entanglement.
