Physics – Quantum Physics
Scientific paper
2007-02-08
Phys. Rev. Lett. 98, 150501 (2007); Phys. Rev. Lett. 99, 059902 (2007)
Physics
Quantum Physics
5 pages, 1 figure. Replaced with final published version
Scientific paper
10.1103/PhysRevLett.99.059902
We develop the minimal requirements for the complete entanglement quantification of an arbitrary two-mode bipartite Gaussian state via local measurements and a classical communication channel. The minimal set of measurements is presented as a reconstruction protocol of local covariance matrices and no previous knowledge of the state is required but its Gaussian character. The protocol becomes very simple mostly when dealing with Gaussian states transformed to its standard form, since photocounting/intensity measurements define the whole set of entangled states. In addition, conditioned on some prior information, the protocol is also useful for a complete global state reconstruction.
de Oliveira Marcos C.
Haruna Luis F.
Rigolin Gustavo
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