Quantum Communication with Time-Bin Encoded Microwave Photons
Quantum Communication with Time-Bin Encoded Microwave Photons
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DOI：
10.1103/physrevapplied.12.044067
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发表时间：
2019-10-29
影响因子：
4.6
通讯作者：
Wallraff, A.
中科院分区：
文献类型：
--
作者：
Kurpiers, P.;Pechal, M.;Wallraff, A.
预告技术在量子通信中很有用，可以在不诉诸纠错方案或量子中继器的情况下避免损失。例如，通过在不干扰传输的量子态的同时监控量子信道接收端的光子损失来实现这样的技术。我们描述并实验测试了一种方案，该方案在使用行进微波光子连接两个跨声子量子比特的直接量子通道中包含错误检测。这是通过将量子信息编码为单光子的时间轴叠加来实现的，这同时实现了高通信速率和高保真。该方案易于在电路量子电动力学中实现，并且完全由微波控制，是未来模块化量子计算体系结构的一个有趣的候选者。
Heralding techniques are useful in quantum communication to circumvent losses without resorting to error-correction schemes or quantum repeaters. Such techniques are realized, for example, by monitoring for photon loss at the receiving end of the quantum channel while not disturbing the transmitted quantum state. We describe and experimentally benchmark a scheme that incorporates error detection in a direct quantum channel connecting two transmon qubits using traveling microwave photons. This is achieved by encoding the quantum information as a time-bin superposition of a single photon, which simultaneously realizes high communication rates and high fidelities. The presented scheme is straightforward to implement in circuit quantum electrodynamics and is fully microwave controlled, making it an interesting candidate for future modular quantum-computing architectures.