Decoherence by correlated noise and quantum error correction.

Journal Article (Journal Article)

We study the decoherence of a quantum computer in an environment which is inherently correlated in time and space. We first derive the nonunitary time evolution of the computer and environment in the presence of a stabilizer error correction code, providing a general way to quantify decoherence for a quantum computer. The general theory is then applied to the spin-boson model. Our results demonstrate that effects of long-range correlations can be systematically reduced by small changes in the error correction codes.

Full Text

Duke Authors

Cited Authors

  • Novais, E; Baranger, HU

Published Date

  • July 24, 2006

Published In

Volume / Issue

  • 97 / 4

Start / End Page

  • 040501 -

PubMed ID

  • 16907555

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.97.040501


  • eng