Nanowerk March 6, 2024
Matter qubit to traveling photonic qubit conversion is the cornerstone of numerous quantum technologies such as distributed quantum computing, as well as several quantum internet and networking protocols. Researchers in Germany formulated a theory for stimulated Raman emission which is applicable to a wide range of physical systems, including quantum dots, solid-state defects, and trapped ions, and various parameter regimes. They found the upper bound for the photonic pulse emission efficiency of arbitrary matter qubit states for imperfect emitters and showed a path forward to optimizing the fidelity. Based on these results, they proposed a paradigm shift from optimizing the drive to directly optimizing the temporal mode of the flying qubit using a closed-form expression, and proposed protocols to produce time-bin encoding and spin-photon entanglement. According to the researchers their methodology has great potential for studying other physical systems… read more. Open Access TECHNICAL ARTICLEÂ
Illustration of the physical system and (b) energy level diagram… Credit: Phys. Rev. Research 6, 013150, 8 February 2024Â