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Phys. Rev. Lett. 92, 167902 (2004) [4 pages]

Concurrence of Mixed Bipartite Quantum States in Arbitrary Dimensions

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Florian Mintert1,2, Marek Kuś2, and Andreas Buchleitner1
1Max-Planck-Institut für Physik Komplexer Systeme, Nöthnitzerstraße 38, D-01187 Dresden, Germany
2Centrum Fizyki Teoretycznej, Polska Akademia Nauk, Aleja Lotników 32/44, PL-02-668 Warszawa, Poland

Received 4 November 2003; published 23 April 2004

We derive a lower bound for the concurrence of mixed bipartite quantum states, valid in arbitrary dimensions. As a corollary, a weaker, purely algebraic estimate is found, which detects mixed entangled states with a positive partial transpose.


©2004 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.92.167902
DOI: 10.1103/PhysRevLett.92.167902
PACS: 03.67.Mn, 89.70.+c

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