4.6 Article

Generation of multipartite spin entanglement from multimode squeezed states

期刊

PHYSICAL REVIEW A
卷 89, 期 1, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.89.012310

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资金

  1. US National Science Foundation [PHY-1206029, PHY-0960047, PHY-0855632]
  2. Direct For Mathematical & Physical Scien
  3. Division Of Physics [0960047] Funding Source: National Science Foundation
  4. Division Of Physics
  5. Direct For Mathematical & Physical Scien [1206029] Funding Source: National Science Foundation

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We investigate the systematic use of the Schwinger representation, by virtue of which two boson fields are equivalent to an effective spin, for casting multimode squeezed states into multipartite spin entangled states. The motivation for this endeavor is the following established fact: finitely squeezed, two-mode entangled states can be recast into maximally entangled bipartite spin states, irrespective of their level of squeezing (in the lossless case). This work explores the generalization of this interesting property to multipartite entanglement. While we found that the generalization of multipartite Gaussian entanglement to multipartite spin entanglement is not straightforward, there are nonetheless interesting features and entangled states to be found. Here we study a few continuous-variable entangled states already realized experimentally, and show that some of them correspond to multipartite spin entangled states.

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