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Phase transitions, entanglement and quantum noise interferometry in cold atoms

TitlePhase transitions, entanglement and quantum noise interferometry in cold atoms
Publication TypeJournal Article
Year of Publication2009
AuthorsF. Mintert, A. M. Rey, I. Satija, and C. W. Clark
JournalEPL
Volume86
Pagination17003
Date Publishedapr
ISSN0295-5075
Keywords2009
Abstract

We show that entanglement monotones reveal the pronounced enhancement of entanglement at a quantum phase transition, when they are sensitive to long-range high-order correlations. Such monotones are found to develop a sharp interferometric peak at the critical point, and to exhibit universal scaling. We demonstrate that similar features are shared by noise correlation spectra, and verify that these experimentally accessible quantities encode entanglement information and probe separability. We give a prescription, for mesoscopic scale systems of how to extract the pronounced enhancement of entanglement at a quantum phase transition from limited accessible experimental data.

URLhttp://stacks.iop.org/0295-5075/86/i=1/a=17003