2003/11/01 by Wang An-Min
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications
paper · doi:10.1088/0256-307x/20/11/001
openalex publication_date 2003/11/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We obtain a simplified and obvious expression of ``concurrence" in Wootters' measure of entanglement of a pair of qubits that have no more than two non-zero eigenvalues in terms of the concurrences of eigenstates and their simple combinations. It not only simplifies the calculation of Wootters' measure of entanglement, but also reveals some general and important features. Our conclusions are helpful for the further understanding and application of quantum entanglement.