Experimentally friendly bounds on non-Gaussian entanglement from second moments

2009/01/22 by Gerardo Adesso · 3 citations
Computer Science · Physics and Astronomy · #Orbital Angular Momentum in Optics #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph

paper · pdf · doi:10.1103/physreva.79.022315

published as Phys. Rev. A 79, 022315 (2009) · 5 pages, 2 figures. To appear in PRA

arxiv created 2009/01/22 · openalex publication_date 2009/02/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We demonstrate that the entanglement in a class of two-mode non-Gaussian states obtained by subtracting photons from Gaussian twin beams can be bounded from above and from below by functionals of the second moments only. Knowledge of the covariance matrix thus suffices for an entanglement quantification with appreciable precision. The absolute error in the entanglement estimation scales with the non-Gaussianity of the considered states.

Cited by

• Strong subadditivity for log-determinant of covariance matrices and its applications
• Quantifying entanglement in two-mode Gaussian states
• Passing quantum correlations to qubits using any two-mode state