General depolarized pure states

Identification and properties

Mark S. Byrd*, Gavin K. Brennen

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The Schmidt decomposition is an important tool in the study of quantum systems especially for the quantification of the entanglement of pure states. However, the Schmidt decomposition is only unique for bipartite pure states, and some multipartite pure states. Here a generalized Schmidt decomposition is given for states which are equivalent to depolarized pure states. Experimental methods for the identification of this class of mixed states are provided and some examples are discussed which show the utility of this description. A particularly interesting example provides, for the first time, an interpretation of the number of negative eigenvalues of the density matrix.

Original languageEnglish
Pages (from-to)1770-1782
Number of pages13
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume372
Issue number11
DOIs
Publication statusPublished - Mar 2008
Externally publishedYes

Keywords

  • Entanglement
  • Tomography

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