Operational Quantification of Continuous Variable Correlations
| dc.creator | Rodó, C. | |
| dc.creator | Adesso, Gerardo | |
| dc.creator | Sanpera, A. | |
| dc.date | 2007-07-19 | |
| dc.date | 2007-11-20 | |
| dc.date.accessioned | 2026-07-07T09:27:47Z | |
| dc.date.available | 2026-07-07T09:27:47Z | |
| dc.description | We quantify correlations (quantum and/or classical) between two continuous variable modes in terms of how many correlated bits can be extracted by measuring the sign of two local quadratures. On Gaussian states, such `bit quadrature correlations' majorize entanglement, reducing to an entanglement monotone for pure states. For non-Gaussian states, such as photonic Bell states, ideal and real de-Gaussified photon-subtracted states, and mixtures of pure Gaussian states, the bit correlations are shown to be a {\em monotonic} function of the negativity. This yields a feasible, operational way to quantitatively measure non-Gaussian entanglement in current experiments by means of direct homodyne detection, without a full tomographical reconstruction of the Wigner function. | |
| dc.description | 4 pages, 3 figures, improved presentation, a subfigure and some explicit analytical expressions added | |
| dc.identifier | https://arxiv.org/abs/0707.2811 | |
| dc.identifier | http://arxiv.org/abs/0707.2811 | |
| dc.identifier | Phys. Rev. Lett. 100, 110505 (2008) | |
| dc.identifier | doi:10.1103/PhysRevLett.100.110505 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/157229 | |
| dc.subject | Quantum Physics | |
| dc.title | Operational Quantification of Continuous Variable Correlations | |
| dc.type | text |