This technology is the first fully structured design of an optical joint-detection receiver that can attain the quantum limit of laser communication. The proposed receiver circuit provides an alternative proposal for a quantum supremacy experiment, targeted at a specific application that can potentially be implemented on a small, special-purpose, photonic quantum computer capable of performing cat-basis universal qubit logic. Background: This invention opens the possibility of reaping a quantum enhancement in lasercom data rates in photon-starved communication scenarios such as deep space lasercom by using upcoming quantum information processors.
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