2009/07/31 by Mauro Paternostro, Gerardo Adesso, Steve Campbell · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Computer science #Mathematics #Mode (computer interface) #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum mechanics #Qubit #State (computer science) #quant-ph
paper · pdf · doi:10.1103/physreva.80.062318
published as Phys. Rev. A 80, 062318 (2009) · 10 pages, 6 figures, RevTeX4, Accepted for publication in Physical Review A
arxiv created 2009/11/10 · openalex publication_date 2009/12/08 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 ``ordering'' relations valid at the level of CV resource states.