2006/05/31 by Daniel Cavalcanti, Marcelo Terra Cunha, Marcelo O. Terra Cunha
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #cond-mat.str-el #quant-ph
paper · pdf · doi:10.1063/1.2337535
published as Appl. Phys. Lett. 89, 084102 (2006) · 3 pages, 1 figure. Comments welcome. V2: references updated. Accepted version by Applied Physics Letters
arxiv created 2006/08/18 · openalex publication_date 2006/08/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The experimental determination of entanglement is a major goal in the quantum information field. In general, the knowledge of the state is required in order to quantify its entanglement. Here we express a lower bound to the robustness of entanglement of a state based only on the measurement of the energy observable and on the calculation of a separability energy. This allows the estimation of entanglement dismissing the knowledge of the state in question.