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/

Zendy Plus

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

Zendy Tools

Zendy Open

For two-path interferometers, the which-path predictability $\mathcal{P}$ andthe fringe visibility $\mathcal{V}$ are familiar quantities that are much usedto talk about wave-particle duality in a quantitative way. We discuss severalcandidates that suggest themselves as generalizations $P$ of $ mathcal{P}$ formulti-path interferometers, and treat the case of three paths in considerabledetail. To each choice for the \emph{path knowledge} $P$, the\emph{interference strength} $V$ -- the corresponding generalization of$\mathcal{V}$ -- is found by a natural, operational procedure. In experimentalterms it amounts to finding those equal-weight superpositions of the pathamplitudes which maximize $P$ for the emerging intensities. Mathematicallyspeaking, one needs to identify a certain optimal one among the Fouriertransforms of the state of the interfering quantum object. Wave-particleduality is manifest, inasmuch as P=1 implies V=0 and V=1 implies P=0, whateverdefinition is chosen. The possible values of the pair $(P,V)$ are restricted toan area with corners at $(P,V)=(0,0)$, $(P,V)=(1,0)$, and $(P,V)=(0,1)$, withthe shape of the border line from $(1,0)$ to $(0,1)$ depending on theparticular choice for $P$ and the induced definition of $V$.

Wave-particle duality in multi-path interferometers: General concepts and three-path interferometers