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6 papers · 2 filters
Non-Perturbative Large N Trans-series for the Gross-Witten-Wadia Beta Function
Anees Ahmed, Gerald V. Dunne
We describe the non-perturbative trans-series, at both weak- and strong-coupling, of the large N approximation to the beta function of the Gross-Witten-Wadia unitary matrix model.…
Goldstone bosons and the Englert-Brout-Higgs mechanism in non-Hermitian theories
Philip D. Mannheim
In recent work Alexandre, Ellis, Millington and Seynaeve have extended the Goldstone theorem to non-Hermitian Hamiltonians that possess a discrete antilinear symmetry such as .…
Critical Points at Infinity, Non-Gaussian Saddles, and Bions
Alireza Behtash, Gerald V. Dunne, Thomas Schaefer +2
It has been argued that many non-perturbative phenomena in quantum mechanics (QM) and quantum field theory (QFT) are determined by complex field configurations, and that these cont…
Quantum Distillation of Hilbert Spaces, Semi-classics and Anomaly Matching
Gerald V. Dunne, Yuya Tanizaki, Mithat Ünsal
A symmetry-twisted boundary condition of the path integral provides a suitable framework for the semi-classical analysis of nonperturbative quantum field theories (QFTs), and we re…
Two-dimensional algebra in lattice gauge theory
Arthur J. Parzygnat
We provide a visual and intuitive introduction to effectively calculating in 2-groups along with explicit examples coming from non-abelian 1- and 2-form gauge theory. In particular…
Unitarity of loop diagrams for the ghost-like propagator
Philip D. Mannheim
With fourth-order derivative theories leading to propagators of the generic ghost-like form, it would appear that such theories have negative norm gho…