Bouillard Martin, Boucher Guillaume, Ortas Júlia Ferrer, Kanseri Bhaskar, Tualle-Brouri Rosa
Opt Express. 2019 Feb 4;27(3):3113-3120. doi: 10.1364/OE.27.003113.
We report the implementation of a high-rate source of single- and two-photon states. By combining the advantages of short pulses and cavities, heralding rates as high as 200 kHz have been obtained for the single photons, as well as 250 Hz for the two-photon states. In this setup, homodyne measurements are conditioned by the heralding of the quantum states thanks to the introduction of a low-loss optical delay line in the heralded states path. This enables the detection of most of the heralded events, and fidelities reaching 68.5% (91% with correction for detection efficiency) and 50.4% (85% with correction) were obtained for the single- and two-photon states, respectively. Such high rates and fidelities in the generation of elementary Fock states may open the path for the production of complex quantum states.
我们报告了一种单光子和双光子态的高速率源的实现情况。通过结合短脉冲和腔的优点，单光子的预示速率高达200kHz，双光子态的预示速率为250Hz。在这种设置中，由于在预示态路径中引入了低损耗光学延迟线，零差测量由量子态的预示来调节。这使得能够检测到大多数预示事件，单光子态和双光子态分别获得了68.5%（校正检测效率后为91%）和50.4%（校正后为85%）的保真度。在基本福克态生成中如此高的速率和保真度可能为复杂量子态的产生开辟道路。
