Two-photon controlled-phase gates enabled by photonic dimers
Two-photon controlled-phase gates enabled by photonic dimers
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DOI：
10.1103/physreva.103.052610
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发表时间：
2021-05-21
影响因子：
2.9
通讯作者：
Steel, Duncan
中科院分区：
文献类型：
--
作者：
Chen, Zihao;Zhou, Yao;Steel, Duncan
光子因其低噪声、长相干时间、光速传输以及易于使用标准光学元件(如分束器和波导)在单量子比特级别进行操作而成为飞行量子比特。由于在单光子水平上缺乏高效的光学克尔非线性，光量子信息处理中的挑战一直是为光子量子比特实现双量子比特门。到目前为止，只有基于线性光学的概率双量子位光子控制相位门和使用光子探测器的投影测量被证明是正确的。利用光子二聚体实现的强光子-光子关联，以及手征量子纳米光子系统中独特的非互易光子传输，可以实现高保真频率编码的确定性双光子控制相位门。
Photons are appealing as flying quantum bits due to their low-noise, long coherence times, light-speed transmission, and ease of manipulation at the single-qubit level using standard optical components such as beam splitters and waveguides. The challenge in optical quantum information processing has been the realization of two-qubit gates for photonic qubits due to the lack of highly efficient optical Kerr nonlinearities at the single-photon level. To date, only probabilistic two-qubit photonic controlled-phase gates based on linear optics and projective measurement using photon detectors have been demonstrated. Here we show that a high-fidelity frequency-encoded deterministic two-photon controlled-phase gate can be achieved by exploiting the strong photon-photon correlation enabled by photonic dimers, and the unique nonreciprocal photonic propagation in chiral quantum nanophotonic systems.