QUICK$^3$ -- Design of a satellite-based quantum light source for quantum communication and extended physical theory tests in space

• URL: http://arxiv.org/abs/2301.11177v2
• Date: Sat, 28 Jan 2023 14:29:29 GMT
• Title: QUICK$^3$ -- Design of a satellite-based quantum light source for quantum communication and extended physical theory tests in space
• Authors: Najme Ahmadi, Sven Schwertfeger, Philipp Werner, Lukas Wiese, Joseph Lester, Elisa Da Ros, Josefine Krause, Sebastian Ritter, Mostafa Abasifard, Chanaprom Cholsuk, Ria G. Kr\"amer, Simone Atzeni, Mustafa G\"undo\u{g}an, Subash Sachidananda, Daniel Pardo, Stefan Nolte, Alexander Lohrmann, Alexander Ling, Julian Bartholom\"aus, Giacomo Corrielli, Markus Krutzik, Tobias Vogl
• Abstract summary: Single photon source can enhance secure data rates in satellite-based quantum key distribution scenarios. payload is being integrated into a 3U CubeSat and scheduled for launch in 2024 into low Earth orbit.
• Score: 73.86330563258117
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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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