Toward implementation of coding for quantum sources and channels

Authors:
Masahide Sasaki
Affiliations:
National Institute of Information and Communications Technalogy, Tokyo, Japan
Venue:
Quantum Information & Computation
Year:
2004

Citing 2
Cited 0

The capacity of the quantum channel with general signal states

IEEE Transactions on Information Theory
Entanglement-assisted capacity of a quantum channel and the reverse Shannon theorem

IEEE Transactions on Information Theory

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Abstract

We review our experiment on quantum source and channel codings, the most funda-mental operations m quantum info-communications. For both codings, entangling letterstates is essential. Our model is based on the polarization-location coding, and a quasi-single photon linear optics implementation to entangle the polarization and locationdegrees of freedom. Using single-photon events in at subset of possible cases, we simulatequantum coding-decoding operations for nonorthogonal states under the quasi-pure statecondition. In the quantum channel coding, we double the spatial bandwidth (number ofoptical paths), and demonstrate the information more than double can be transmitted.In the quantum source coding, we halve the spatial bandwidth to compress the data anddecompress the original data with the high fidelity approaching the theoretical limit.