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

The Pauli-Fierz model $H(\alpha)$ in nonrelativistic quantum electrodynamicsis considered. The external potential $V$ is sufficiently shallow and thedipole approximation is assumed. It is proven that there exist constants$0<\alpha_-< \alpha_+$ such that $H(\alpha)$ has no ground state for$|\alpha|<\alpha_-$, which complements an earlier result stating that there isa ground state for $|\alpha| > \alpha_+$. We develop a suitable extension ofthe Birman-Schwinger argument. Moreover for any given $\delta>0$ examples ofpotentials $V$ are provided such that $\alpha_+-\alpha_-<\delta$.

The No-Binding Regime of the Pauli-Fierz Model