Berlin 2005 – scientific programme
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Q: Quantenoptik und Photonik
Q 51: Gruppenberichte Quanteninformation
Q 51.1: Group Report
Tuesday, March 8, 2005, 16:30–17:00, HU Audimax
Measures and Dynamics of entangled states — •André Carvalho1, Florian Mintert1, Marek Kuś2, and Andreas Buchleitner1 — 1Max Planck Institut für Physik komplexer Systeme, Dresden — 2Centrum Fizyki Teoretycznej Polskiej Akademii Nauk, Warszawa
We propose generalizations of concurrence for multi-partite quantum systems
that can distinguish qualitatively distinct quantum correlations. All
introduced quantities can be evaluated efficiently for arbitrary mixed states.
In particular, a purely algebraic evaluation is possible for quasi-pure states
typically dealt with in state of the art experiments.
With these techniques, we investigate the dynamics of entangled states
under environment coupling. As particular examples,
we discuss the creation of entanglement between
trapped ions, and the stability of GHZ- and W-states with locally Markovian
Lindblad dynamics.
P. Rungta, V. Buzek, C. M. Caves, M. Hillery, G. J. Milburn and
W. K. Wootters, Universal state inversion and concurrence in arbitrary dimensions,
Phys. Rev. A, 64, 042315, (2001)
F. Mintert, M. Kuś and A. Buchleitner,
Concurrence of bipartite quantum states in arbitrary dimensions,
Phys. Rev. Lett. 92, 167902, (2004)
A. R. R. Carvalho, F. Mintert and A. Buchleitner, Decoherence and multi-partite entanglement, in press in Phys. Rev. Lett, quant-ph/0410208