Passing quantum correlations to qubits using any two-mode state

Mauro Paternostro, Gerado Adesso, Steve Campbell

Research output: Contribution to journalArticle

12 Citations (Scopus)
208 Downloads (Pure)

Abstract

We draw an explicit connection between the statistical properties of an entangled two-mode continuous variable (CV) resource and the amount of entanglement that can be dynamically transferred to a pair of noninteracting two-level systems. More specifically, we rigorously reformulate entanglement-transfer process by making use of covariance matrix formalism. When the resource state is Gaussian, our method makes the approach to the transfer of quantum correlations much more flexible than in previously considered schemes and allows the straightforward inclusion of the effects of noise affecting the CV system. Moreover, the proposed method reveals that the use of de-Gaussified two-mode states is almost never advantageous for transferring entanglement with respect to the full Gaussian picture, despite the entanglement in the non-Gaussian resource can be much larger than in its Gaussian counterpart. We can thus conclude that the entanglement-transfer map overthrows the
Original languageEnglish
Article number062318
Number of pages11
JournalPhysical Review A
Volume80
Issue number6
DOIs
Publication statusPublished - 08 Dec 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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