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

We propose a new non-perturbative technique for calculating the field-theoryS-matrix directly from the eigenstates of the Hamiltonian. Our method involvesa discretized momentum space and a momentum cutoff, thereby truncating theHilbert space and making numerical diagonalization of the Hamiltonianachievable. We show how to do this in the context of a simplified $\lambda\phi^4$ theory in two space-time dimensions. We present the results of ourdiagonalization, its dependence on time, its dependence on the parameters ofthe theory and its renormalization.

Diagonalizing the Hamiltonian of $\lambda \phi^4$ Theory in 2 Space-Time Dimensions