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Title: Maximally entangled mixed states of two qubits
Authors: Verstraete, Frank ×
Audenaert, Koenraad
De Moor, Bart #
Issue Date: Jul-2001
Publisher: American physical soc
Series Title: Physical Review A, Atomic, Molecular and Optical Physics vol:64 issue:1 pages:012316
Abstract: We consider mixed states of two qubits and show under which global unitary operations their entanglement is maximized. This leads to a class of states that is a generalization of the Bell states. Three measures of entanglement are considered: entanglement of formation, negativity, and relative entropy of entanglement. Surprisingly all states that maximize one measure also maximize the; others. We give a complete characterization of these generalized Bell states and prove that these states for fixed eigenvalues are all equivalent under local unitary transformations. Furthermore we characterize all nearly entangled states closest to the maximally mixed state and derive a lower bound on the volume of separable mixed states.
ISSN: 1050-2947
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - STADIUS, Stadius Centre for Dynamical Systems, Signal Processing and Data Analytics
× corresponding author
# (joint) last author

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