On maximal entanglement between two pairs in four-qubit pure states

Abstract

We show that the state with the highest known average two-particle von Neumann entanglement entropy proposed by Sudbery and one of the authors gives a local maximum of this entropy. We also show that this is not the case for an alternative highly entangled state proposed by Brown et al.

Additional paragraph added referring to the proposed state in relation to bipartite entanglement and the concurrence. References added

References in corpus (1)

• General Monogamy Inequality for Bipartite Qubit Entanglement

Cited by in corpus (6)

• Maximally multipartite entangled states
• Multi-Qubit Systems: Highly Entangled States and Entanglement Distribution
• Multiparty quantum states stabilized by the diagonal subgroup of the local unitary group
• Classification of nonproduct states with maximum stabilizer dimension
• Symmetric construction of reference-frame-free qudits
• Some Entanglement Features of Highly Entangled Multiqubit States