Entanglement dynamics in the Lipkin-Meshkov-Glick model

Details Entanglement dynamics in the Lipkin-Meshkov-Glick model Entanglement dynamics in the Lipkin-Meshkov-Glick model

2004-06-21

arxiv.org/abs/cond-mat/0406481v2

Phys.Rev.A70:062304,2004

Physics

Condensed Matter

Other Condensed Matter

11 pages, 11 EPS figures, published version

Scientific paper

10.1103/PhysRevA.70.062304

The dynamics of the one-tangle and the concurrence is analyzed in the Lipkin-Meshkov-Glick model which describes many physical systems such as the two-mode Bose-Einstein condensates. We consider two different initial states which are physically relevant and show that their entanglement dynamics are very different. A semiclassical analysis is used to compute the one-tangle which measures the entanglement of one spin with all the others, whereas the frozen-spin approximation allows us to compute the concurrence using its mapping onto the spin squeezing parameter.

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