EXPERIMENTAL QUANTUM ERROR-CORRECTION

Quantum error correction is required to compensate for the fragility o f the state of a quantum computer. We report the first experimental im plementations of quantum error correction and confirm the expected sta te stabilization. A precise analysis of the decay behavior is performe d in alanine and a full implementation of the error correction procedu re is realized in trichloroethylene, In NMR computing, however, a net improvement in the signal to noise would require very high polarizatio n. The experiment implemented the three-bit code for phase errors usin g liquid state NMR.