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

We construct a Hamiltonian for a quantum-mechanical model of nonrelativisticparticles in three dimensions interacting via the creation and annihilation ofa second type of nonrelativistic particles, which are bosons. The interactionbetween the two types of particles is a point interaction concentrated on thepoints in configuration space where the positions of two different particlescoincide. We define the operator, and its domain of self-adjointness, in termsof co-dimension-three boundary conditions on the set of collisionconfigurations relating sectors with different numbers of particles.

A nonrelativistic quantum field theory with point interactions in three dimensions