The generation of single photons using solid-state quantum emitters is pivotal for advancing photonic quantum technologies, particularly in quantum communication. As the field continuously advances toward practical use cases and beyond shielded laboratory environments, specific demands are placed on the robustness of quantum light sources during operation. In this context, the robustness of the quantum light generation process against intrinsic and extrinsic effects is a major challenge. Here, we present a robust scheme for the coherent generation of indistinguishable single-photon states with very low photon number coherence using a three-level system in a semiconductor quantum dot. Our approach combines the advantages of adiabatic rapid passage and stimulated two-photon excitation. We demonstrate robust quantum light generation while maintaining the prime quantum-optical quality of the emitted light state. Moreover, we highlight the immediate advantages of the implementation of various quantum cryptographic protocols.

中文翻译：

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通过受激绝热快速通过实现量子信息的稳健单光子生成


使用固态量子发射器生成单光子对于推进光子量子技术至关重要，尤其是在量子通信中。随着该领域不断向实际用例发展，并超越屏蔽实验室环境，对量子光源在运行过程中的稳健性提出了特定要求。在这种情况下，量子光生成过程对内禀和外禀效应的鲁棒性是一项重大挑战。在这里，我们提出了一种稳健的方案，用于使用半导体量子点中的三能级系统产生具有非常低光子数相干性的不可区分的单光子态。我们的方法结合了绝热快速通过和受激双光子激发的优点。我们展示了稳健的量子光生成，同时保持发射光态的素数量子光学质量。此外，我们强调了实现各种量子加密协议的直接优势。