Color centers are promising candidates for quantum technologies due to their long coherence times and high-quality spin-photon interfaces. Silicon has recently emerged as a host for color centers operating in the telecommunication bands, in a technological platform featuring the world’s most advanced manufacturing, electronics, and photonics. In this talk, I will present our recent work on the fabrication and isolation of individual G-centers in silicon photonic waveguides, their spectral reconfiguration, and the enhancement of their light-matter interaction via coupling to photonic crystal cavities.
We route the single photons from a trapped barium ion in a nanophotonic circuit. For this routing, we first generate C-band telecom single photons from barium ion which makes them compatible with the silicon-nitride photonic foundry. Then using the thermo-optic property of silicon-nitride, we switch the single photons in a Mach-Zehnder interferometer controlling the current of the phase-shifter. These results could enable a new generation of compact and reconfigurable integrated photonic devices that can serve as efficient quantum interconnects for quantum computers and sensors.
Combinatorial problems, such as the Ising problem, are hard to solve with conventional electronics. Photonic systems have recently been proposed as an efficient platform to solve these problems faster and more efficiently, thus calling for the development of featured algorithms to run on photonic machines. A few recent findings, including the Photonic Recurrent Ising Sampler, a photonic machine that recurrently solves arbitrary Ising problems, will be presented in this talk, along with their experimental realizations in various platforms.
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