Nonlocal Entanglement Transformations Achievable by Separable Operations

Eric Chitambar, Runyao Duan

Research output: Contribution to journalArticlepeer-review


The weird phenomenon of "quantum nonlocality without entanglement" means that local quantum operations assisted by classical communication constitute a proper subset of the class of separable quantum operations. Despite considerable recent advances, little is known to what extent the class of separable operations differs from local quantum operations and classical communication. In this Letter we show that separable operations are generally stronger than local quantum operations and classical communication when distilling a mixed state into a pure entangled state and thus confirm the existence of entanglement monotones that can increase under separable operations. Our finding can also be interpreted as confirming the ability of separable operations to enhance the entanglement of mixed states relative to certain measures, a sensible but important fact that has never been rigorously proven before.

Original languageEnglish (US)
Article number110502
JournalPhysical review letters
Issue number11
StatePublished - Sep 8 2009
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


Dive into the research topics of 'Nonlocal Entanglement Transformations Achievable by Separable Operations'. Together they form a unique fingerprint.

Cite this