Search

MiS Preprint Repository

We have decided to discontinue the publication of preprints on our preprint server as of 1 March 2024. The publication culture within mathematics has changed so much due to the rise of repositories such as ArXiV (www.arxiv.org) that we are encouraging all institute members to make their preprints available there. An institute's repository in its previous form is, therefore, unnecessary. The preprints published to date will remain available here, but we will not add any new preprints here.

MiS Preprint
67/2007

Local Equivalence of Rank-Two Quantum Mixed States

Sergio Albeverio, Shao-Ming Fei and Debashish Goswami

Abstract

We investigate the equivalence of quantum mixed states under local unitary transformations. For a class of rank-two mixed states, a sufficient and necessary condition of local equivalence is obtained by giving a complete set of invariants under local unitary transformations, such that two states in this class are locally equivalent if and only if all these invariants have equal values for them.

Received:
Jul 30, 2007
Published:
Jul 30, 2007
PACS:
03.67.-a, 02.20.Hj, 03.65.-w
Keywords:
Local Equivalence, Rank-Two Mixed States

Related publications

inJournal
2007 Repository Open Access
Sergio Albeverio, Shao-Ming Fei and Debashish Goswami

Local equivalence of rank-2 quantum mixed states

In: Journal of physics / A, 40 (2007) 36, pp. 11113-11117