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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In the context of bipartite bosonic systems, two notions of classicality ofcorrelations can be defined: P-classicality, based on the properties of theGlauber-Sudarshan P-function; and C-classicality, based on the entropic quantumdiscord. It has been shown that these two notions are maximally inequivalent ina static (metric) sense -- as they coincide only on a set of states of zeromeasure. We extend and reinforce quantitatively this inequivalence byaddressing the dynamical relation between these types of non-classicality in aparadigmatic quantum-optical setting: the linear mixing at a beam splitter of asingle-mode Gaussian state with a thermal reference state. Specifically, weshow that almost all P-classical input states generate outputs that are notC-classical. Indeed, for the case of zero thermal reference photons, the moreP-classical resources at the input the less C-classicality at the output. Inaddition, we show that the P-classicality at the input -- as quantified by thenon-classical depth -- does instead determine quantitatively the potential ofgenerating output entanglement. This endows the non-classical depth with a newoperational interpretation: it gives the maximum number of thermal referencephotons that can be mixed at a beam splitter without destroying the outputentanglement.

Single- and two-mode quantumness at a beam splitter