Disentanglement and inseparability correlation in a two-qubit system

1999/11/14 by Zheng-Wei Zhou, Guang-Can Guo, Guang‐Can Guo
Computer Science · Mathematics · Physics and Astronomy · #Correlation #Geometry #Ideal (ethics) #Isotropy #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum mechanics #Qubit #Statistical physics #quant-ph

paper · pdf · doi:10.1103/physreva.61.032108

10 Pages, 2 Figures, REVTeX; to appear in PRA

arxiv created 1999/11/14 · openalex publication_date 2000/02/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Starting from local universal isotropic disentanglement, a threshold inequality for reduction factors is proposed, which is necessary and sufficient for this type of disentanglement processes. Furthermore, we give the conditions realizing ideal disentanglement processes provided that some information on quantum states is known. In addition, based on a fully entangled fraction, a concept called inseparability correlation is presented. Some properties on inseparability correlation coefficient are studied.

Citations

• Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels
• Fidelity for Mixed Quantum States
• Separability Criterion for Density Matrices
• A single quantum cannot be cloned
• Noncommuting Mixed States Cannot Be Broadcast
• Quantum cryptography based on Bell’s theorem
• Teleportation, Bell's Inequalities and Inseparability
• Separability of mixed states: necessary and sufficient conditions
• Quantifying Entanglement