Randomly distilling W-class states into general configurations of two-party entanglement

W. Cui, E. Chitambar, H. K. Lo

Research output: Contribution to journalArticlepeer-review

Abstract

In this article we obtain results for the task of converting a single N-qubit W-class state (of the form √x0|00...0+√x 1|10...0++√xN|00...1) into maximum entanglement shared between two random parties. Previous studies in random distillation have not considered how the particular choice of target pairs affects the transformation, and here we develop a strategy for distilling into general configurations of target pairs. We completely solve the problem of determining the optimal distillation probability for all three-qubit configurations and most four-qubit configurations when x0=0. Our proof involves deriving new entanglement monotones defined on the set of four-qubit W-class states. As an additional application of our results, we present new upper bounds for converting a generic W-class state into the standard W state |W N=√1N(|10...0++|00...1).

Original languageEnglish (US)
Article number052301
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume84
Issue number5
DOIs
StatePublished - Nov 1 2011
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Randomly distilling W-class states into general configurations of two-party entanglement'. Together they form a unique fingerprint.

Cite this