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Q: Quantenoptik

Q 18: Quanteninformation 3

Q 18.8: Talk

Tuesday, March 25, 2003, 15:45–16:00, F102

Quantifying the Entanglement of Gaussian States — •Geza Giedke^1,2, Michael Wolf^3,1, Reinhard F. Werner³, and J. Ignacio Cirac¹ — ¹Max-Planck-Institut für Quantenoptik, Garching — ²4. Physikalisches Institut, Universität Stuttgart — ³Institut für Mathematische Physik, TU Braunschweig

We introduce an entanglement measure for general Gaussian states that can be easily computed and is non-zero for entangled states with positive partial transpose. We calculate the entanglement of formation for two-mode Gaussian states. We relate these measures to concrete quantum information tasks.