English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We provide an alternative interpretation of recently published experimentalresults that were represented as demonstrating entanglement between twomacroscopic quantum Josephson oscillators. We model the experimental systemusing the well-established classical equivalent circuit of a resistively andcapacitively shunted junction. Simulation results are used to generate thecorresponding density matrix, which is strikingly similar to the previouslypublished matrix that has been declared to be an unambiguous demonstration ofquantum entanglement. Since our data are generated by a classical model, wetherefore submit that state tomography cannot be used to determine absolutelywhether or not quantum entanglement has taken place. Analytical arguments aregiven for why the classical analysis provides an adequate explanation of theexperimental results.

Is state tomography an unambiguous test of quantum entanglement?