QUICK^3 – Design of a satellite-based quantum light source for quantum communication and extended physical theory tests in space
arxiv(2023)
摘要
Modern quantum technologies have matured such that they can now be used in
space applications, e.g., long-distance quantum communication. Here, we present
the design of a compact true single photon source that can enhance the secure
data rates in satellite-based quantum key distribution scenarios compared to
conventional laser-based light sources. Our quantum light source is a
fluorescent color center in hexagonal boron nitride. The emitter is
off-resonantly excited by a diode laser and directly coupled to an integrated
photonic processor that routes the photons to different experiments performed
directly on-chip: (i) the characterization of the single photon source and (ii)
testing a fundamental postulate of quantum mechanics, namely the relation of
the probability density and the wave function (known as Born's rule). The
described payload is currently being integrated into a 3U CubeSat and scheduled
for launch in 2024 into low Earth orbit. We can therefore evaluate the
feasibility of true single photon sources and reconfigurable photonic circuits
in space. This provides a promising route toward a high-speed quantum network.
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