4.0 Article

THE TRACE DISTANCE AND LINEAR ENTROPY OF QUBIT STATES: THE ROLE OF INITIAL QUBIT-ENVIRONMENT CORRELATIONS

Journal

REPORTS ON MATHEMATICAL PHYSICS
Volume 70, Issue 2, Pages 193-204

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0034-4877(12)60039-1

Keywords

system-environment correlations; reduced dynamics; trace distance; dephasing

Funding

  1. NCN [N202 052940, UMO-2011/01/B/ST6/07197, 2011/01/N/ST3/02473]

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The role of initial qubit-environment correlations on trace distance between two qubit states is studied in the framework of non-Markovian pure dephasing. The growth of mixedness of reduced state quantified by linear entropy is shown to be related to the degree of initial qubit-environment correlations.

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