Phys. Rev. Lett. 101, 220403 (2008) [4 pages]Entanglement of Formation for an Arbitrary Two-Mode Gaussian StateReceived 1 September 2008; published 26 November 2008 We write the optimal pure-state decomposition of any two-mode Gaussian state and show that its entanglement of formation coincides with the Gaussian one. This enables us to develop an insightful approach of evaluating the exact entanglement of formation. Its additivity is finally proven. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.220403
DOI:
10.1103/PhysRevLett.101.220403
PACS:
03.65.Ud, 03.67.Mn, 42.50.Dv
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