Efficient schemes for reducing imperfect collective decoherences

Won Young Hwang, Hyukjae Lee, Doyeol Ahn, Sung Woo Hwang

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Information processing with quantum bits is used to solve classical intractable problems. A scheme is proposed that is efficient even when a pair of qubits undergoes imperfect collective decoherence. The quantum Zeno effect was used to reduce the leakage out of the encoding space generated by the imperfection. Phase errors in the encoded bits were reduced by the concatenation of the decoherence free subspace with a three qubit quantum error correcting code.

Original languageEnglish
Pages (from-to)62305-62301
Number of pages5
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number6
StatePublished - Dec 2000


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