# Multimode Time-Delay Interferometer for Free-Space Quantum Communication

@article{Cahall2020MultimodeTI, title={Multimode Time-Delay Interferometer for Free-Space Quantum Communication}, author={Clinton Cahall and Nurul T Islam and Daniel J. Gauthier and Jungsang Kim}, journal={Physical Review Applied}, year={2020} }

Quantum communication schemes such as quantum key distribution (QKD) and superdense teleportation provide unique opportunities to communicate information securely. Increasingly, optical communication is being extended to free-space channels, but atmospheric turbulence in free-space channels requires optical receivers and measurement infrastructure to support many spatial modes. Here we present a multi-mode, Michelson-type time-delay interferometer using a field-widened design for the…

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