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Multipartite Mixed Maximally Entangled States: Mixed States with Entanglement 1 · arXivDesk

2109.11548Sep 23, 202116 pages, 3 figures, 5 tables. v2: fixed small typos in references; added clarification to side note in conclusions explaining why MME states can never be converted to X form in some systems but can be converted to TGX form; main results unchanged

Multipartite Mixed Maximally Entangled States: Mixed States with Entanglement 1

Samuel R. Hedemann

Quantum Physics

arXiv PDF

Abstract

We present a full definition of mixed maximally entangled (MME) states for multipartite systems, generalizing their existing definition for bipartite systems by using multipartite Schmidt decomposition. MME states are a special kind of maximally entangled mixed state (MEMS) for which every pure decomposition state in all decompositions is maximally entangled. Thus, MME states have entanglement 1 by all valid unit-normalized entanglement measures, whereas general MEMS can have entanglement less than 1. Multipartite MME states likely have important applications such as remote state preparation, and also set critical performance goals for entanglement measures.

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