Abstract
Quantum correlations and entanglement in many-particle systems can be used to significantly increase and extend the performance of standard communication and computation techniques.1 Quantum dense coding2 allows the transmission of 2 bits of information in a single two state particle; combining this particle with its originally entangled partner enables one to read the densely coded information. A similar combination, of two quantum systems is used in the teleportation of quantum. states.3 There, an unknown quantum state can be transferred after a combined measurement on the original carrier particle and one member of an EPR pair. The result of the measurement (2 bits of information) on this two-particle system, is used to transfer the unknown quantum state onto the other EPR particle.
© 1996 Optical Society of America
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