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Entanglement of formation for symmetric Gaussian states

G. Giedke, M.M. Wolf, O.Krueger, R.F. Werner, J.I. Cirac

Phys. Rev. Lett. 91, 107901 **, (2003)

DOI: 10.1103/PhysRevLett.91.107901 Pfeil
**: quant-ph/0304042 Pfeil

Abstract: We show that for a fixed amount of entanglement, two-mode squeezed states are those that maximize Einstein-Podolsky-Rosen-like correlations. We use this fact to determine the entanglement of formation for all symmetric Gaussian states corresponding to two modes. This is the first instance in which this measure has been determined for genuine continuous variable systems.