Entanglement of Pure Two-Mode Gaussian States

Details Entanglement of Pure Two-Mode Gaussian States Entanglement of Pure Two-Mode Gaussian States

2005-02-09

arxiv.org/abs/quant-ph/0502057v1

Physics

Quantum Physics

12 pages

Scientific paper

10.1103/PhysRevA.72.012330

The entanglement of general pure Gaussian two-mode states is examined in terms of the coefficients of the quadrature components of the wavefunction. The entanglement criterion and the entanglement of formation are directly evaluated as a function of these coefficients, without the need for deriving local unitary transformations. These reproduce the results of other methods for the special case of symmetric pure states which employ a relation between squeezed states and Einstein-Podolsky-Rosen correlations. The modification of the quadrature coefficients and the corresponding entanglement due to application of various optical elements is also derived.

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