What is quantum computation?

A Ekert, P Hayden, H Inamori, D K L Oi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


"Information is physical and any processing of information is always performed by physical means," an innocent-sounding statement, but its consequences are profound. When quantum effects become important, for example, at the level of single atoms and photons, the classical theory of computation becomes fundamentally inadequate. Entirely new modes of computation and information processing become possible. In the last few years there has been an explosion of theoretical and experimental research in quantum computation. In this brief review we describe some of these developments.

Original languageEnglish
Pages (from-to)3335-3363
Number of pages29
JournalInternational Journal of Modern Physics A
Issue number20
Publication statusPublished - 10 Aug 2001


  • error-correcting codes
  • decoherence
  • quantum computation
  • networks


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