Experimental demonstration of quantum source coding.
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.
Mitsumori
Yasuyoshi
Y
Communications Research Laboratory, Koganei, 4-2-1 Nukuikita, Koganei, Tokyo 184-8795, Japan.
Vaccaro
John A
JA
Barnett
Stephen M
SM
Andersson
Erika
E
Hasegawa
Atsushi
A
Takeoka
Masahiro
M
Sasaki
Masahide
M