Quantum Information Processing

, Volume 1, Issue 1–2, pp 5–12 | Cite as

Approximate Quantum Error Correction

  • Benjamin Schumacher
  • Michael D. Westmoreland


The errors that arise in a quantum channel can be corrected perfectly if and only if the channel does not decrease the coherent information of the input state. We show that, if the loss of coherent information is small, then approximate quantum error correction is possible.

PACS: 03.67.H, 03.65.U

quantum error correction 


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Copyright information

© Plenum Publishing Corporation 2002

Authors and Affiliations

  • Benjamin Schumacher
    • 1
  • Michael D. Westmoreland
    • 2
  1. 1.Department of PhysicsKenyon CollegeGambier
  2. 2.Department of Mathematical SciencesDenison UniversityGranville

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