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Quantum communication leverages the physical properties of entanglement and superposition to create networks capable of connecting quantum computers, sensors, and secure nodes. Photons are a particularly viable information vehicle as they are unaffected by a broad range of environmental variables. They are also very versatile, supporting the teleportation of quantum information upon interacting with information-carrying qubits, whether these qubits are generated by a quantum computer or a random qubit source. Existing and emerging technologies will be discussed, as well as perspectives on the open challenges of the field.
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