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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Quantum optics in combination with integrated optical devices shows greatpromise for efficient manipulation of single photons. New physical concepts,however, can only be found when these fields truly merge and reciprocallyenhance each other. Here we work at the merging point and investigate thephysical concept behind a two-coupled-waveguide system with an integratedparametric down-conversion process. We use the eigenmode description of thelinear system and the resulting modification in momentum conservation to derivethe state generation protocol for this type of device. With this new concept ofstate engineering, we are able to effectively implement a two-in-one waveguidesource that produces the useful two-photon NOON state without extra overheadsuch as phase stabilization or narrow-band filtering. Experimentally, webenchmark our device by measuring a two-photon NOON state fidelity of$\mathcal{F} = (84.2 \pm 2.6) \%$ and observe the characteristicinterferometric pattern directly given by the doubled phase dependence with avisibility of $V_{\mathrm{NOON}} = (93.3 \pm 3.7) \%$.

Dual-path source engineering in integrated quantum optics