论文标题
量子通信的原子稀薄的单光子源
Atomically-thin Single-photon Sources for Quantum Communication
论文作者
论文摘要
迄今为止，量子通信广泛依赖于秘密钥匙一代的衰减激光器。在未来的量子网络中，必须通过使用确定性量子光源来克服其概率光子分布产生的基本限制。过渡金属二核苷（TMDC）的单层中的约束激子构成了一种新兴的发射极类型，用于量子光生。这些原子上稀薄的固态资源显示出对大规模和低成本设备集成的吸引人的前景，满足了量子信息技术的需求。在这里，我们开创了TMDC设备在量子通信中的实际适用性。我们采用$ \ MathRM {WSE} _2 $单层单光子源来模拟量子密钥分布（QKD）设置中的BB84协议，并实现最高66.95 kHz的点击率，并使用QKD实验量的QKD实验量符合半质量或色素，并具有0.034的抗气压值 - 与QKD实验竞争。我们的工作为使用TMDC单光子源开辟了通往量子信息技术的更广泛应用的途径。
To date, quantum communication widely relies on attenuated lasers for secret key generation. In future quantum networks fundamental limitations resulting from their probabilistic photon distribution must be overcome by using deterministic quantum light sources. Confined excitons in monolayers of transition metal dichalcogenides (TMDCs) constitute an emerging type of emitter for quantum light generation. These atomically-thin solid-state sources show appealing prospects for large-scale and low-cost device integration, meeting the demands of quantum information technologies. Here, we pioneer the practical suitability of TMDC devices in quantum communication. We employ a $\mathrm{WSe}_2$ monolayer single-photon source to emulate the BB84 protocol in a quantum key distribution (QKD) setup and achieve click rates of up to 66.95 kHz and antibunching values down to 0.034 - a performance competitive with QKD experiments using semiconductor quantum dots or color centers in diamond. Our work opens the route towards wider applications of quantum information technologies using TMDC single-photon sources.
