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The quantum properties of optical devices are important • In conventional optical communication systems, quantum effects are responsible for noise inherent in the si (by amplifiers and attenuators) and noise in the detectors. gnals, noise added during transmission • Noise obscures the signals and lowers the information capacities. • There are many schemes for quantum communication and computation that rely on the quantum properties of light. • • Examples include quantum key distribution (QKD) and linear optical quantum computation (LOQC). • Common requirements for quantum information experiments include photon generators (singlet or pair) and (distortionless) photon frequency-convertors.
© 2011 Optical Society of America
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