Abstract
The symmetric Werner states for qubits, important in the study of quantum nonlocality and useful for applications in quantum information, have a surprisingly simple and elegant structure in terms of tensor products of Pauli matrices. Further, each of these states forms a unique local unitary equivalence class, that is, no two of these states are interconvertible by local unitary operations.
- Received 27 June 2011
DOI:https://doi.org/10.1103/PhysRevA.84.042316
©2011 American Physical Society