Single‐Photon Sources for Multi‐Photon Applications
Stefan Frick, Robert Keil, Vikas Remesh, Gregor Weihs · 2023
Much of the recent development of single-photon sources is driven by the desire to apply them to protocols and technologies that use the interference of two or more photons, such as quantum repeaters or boson sampling. In all of these cases, the indistinguishability of the produced photons is a key requirement. For those applications that want to scale to larger photon numbers, source efficiency is equally important. In this chapter, we will discuss two competing solutions, sources based on nonlinear optics and quantum dots, as the most-used single-quantum emitters.