1996/11/16 by Andrew Steane · 6 citations
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physrevlett.78.2252
published as Phys.Rev.Lett.78:2252-2255,1997 · 8 pages LaTeX plus 4 figures. Submitted to Phys. Rev. Lett
arxiv created 1996/11/16 · arxiv updated 2009/12/01
Active stabilisation of a quantum system is the active suppression of noise (such as decoherence) in the system, without disrupting its unitary evolution. Quantum error correction suggests the possibility of achieving this, but only if the recovery network can suppress more noise than it introduces. A general method of constructing such networks is proposed, which gives a substantial improvement over previous fault tolerant designs. The construction permits quantum error correction to be understood as essentially quantum state synthesis. An approximate analysis implies that algorithms involving very many computational steps on a quantum computer can thus be made possible.