We report an experimental demonstration of Schumacher's quantum noiseless coding theorem. Our experiment employs a sequence of single photons, each of which represents three qubits in terms of eight spatial and polarization modes. We initially prepare each photon in one of a set of eight nonorthogonal code word states corresponding to the value of a block of three binary letters. We use quantum coding to compress this quantum data into a two-qubit quantum channel and then uncompress the two-qubit channel to restore the original data with a fidelity approaching the theoretical limit.
- quantum source coding
- quantum physics
Mitsumori, Y., Vaccaro, J. A., Barnett, S. M., Andersson, E., Hasegawa, A., Takeoka, M., & Sasaki, M. (2003). Experimental demonstration of quantum source coding. Physical Review Letters, 91(21). https://doi.org/10.1103/PhysRevLett.91.217902