Abstract
The generalized -qubit Greenberger-Horne-Zeilinger (GHZ) states and their local unitary equivalents are the only pure states of qubits that are not uniquely determined (among arbitrary states, pure or mixed) by their reduced density matrices of qubits. Thus, the generalized GHZ states are the only ones containing information at the -party level.
- Received 20 August 2008
DOI:https://doi.org/10.1103/PhysRevA.79.032326
©2009 American Physical Society