Session V15: Quantum Error Correction and Control

11:15 AM–2:15 PM, Thursday, March 13, 2008
Morial Convention Center - 207

Sponsoring Unit: GQI
Chair: Lorenza Viola, Dartmouth College

Abstract ID: BAPS.2008.MAR.V15.2

Abstract: V15.00002 : Decoherence-free subspaces and incoherently generated coherences

11:27 AM–11:39 AM

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Authors:

  Raisa Karasik
    (BQIC and Applied Science \& Technology, University of Califonia, Berkeley )

  Karl-Peter Marzlin
    (IQIS, University of Calgary)

  Barry C. Sanders
    (IQIS, University of Calgary)

  K. Birgitta Whaley
    (BQIC and Dept. of Chemistry, University of California, Berkeley)

A decoherence-free subspace (DFS) is a collection of states that is immune to the dominant noise effects created by the environment. DFS is usually studied for states involving two or more particles and is considered a prominent candidate for quantum memory and quantum information processing. We present rigorous criteria for the existence of DFS in finite-dimensional systems coupled to the Markovian reservoirs. This allows us to identify a new special class of decoherence free states that relies on rather counterintuitive phenomenon, which we call an ``incoherent generation of coherences.'' We provide examples of physical systems that support such states.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.MAR.V15.2