Results 21 to 30 of about 36,165 (249)

Nonperturbative Effects on Nucleation [PDF]

Physical Review Letters, 1996
Latex, 8 pages, 2 postscript figures, submitted to PRL. Also available at http://fnas08.fnal.gov/
Marcelo Gleiser, Andrew F. Heckler
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Nonperturbative effect in threshold resummation [PDF]

Journal of High Energy Physics, 2009
JHEP06(2009 ...
Zhao Li, C.-P. Yuan, Chong Sheng Li
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Comment on nonperturbative effects in [PDF]

Physics Letters B, 1997
Comment: 9 pages revtex, 2 figures included; minor changes, to appear in Phys.
Lisa Randall, Zoltan Ligeti, Mark B. Wise   +2 more
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Remembrance of things past

Journal of High Energy Physics, 2023
Nonlinear sigma models on de Sitter background have proved a useful prototype for quantum gravity in summing the large logarithms which arise from loop corrections.
R. P. Woodard, B. Yesilyurt
doaj   +1 more source

Revealing Nonperturbative Effects in the SYK Model [PDF]

Theoretical and Mathematical Physics, 2019
We study the large $N$ saddle points of two SYK chains coupled by an interaction that is nonlocal in Euclidean time. We start from analytic treatment of the free case with $q=2$ and perform the numerical study of the interacting case $q=4$. We show that in both cases there is a nontrivial phase structure with infinite number of phases.
Mikhail Khramtsov, Igor V. Volovich, I. Ya. Aref'eva   +2 more
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Gentle introduction to rigorous Renormalization Group: a worked fermionic example

Journal of High Energy Physics, 2021
Much of our understanding of critical phenomena is based on the notion of Renormalization Group (RG), but the actual determination of its fixed points is usually based on approximations and truncations, and predictions of physical quantities are often of
Alessandro Giuliani, Vieri Mastropietro, Slava Rychkov   +2 more
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Quantum unitary dynamics of a charged fermionic field and Schwinger effect

Journal of High Energy Physics, 2021
In quantum field theory, particle creation occurs, in general, when an intense external field, such as an electromagnetic field, breaks time translational invariance. This leads to an ambiguity in the definition of the vacuum state.
Álvaro Álvarez-Domínguez, Luis J. Garay, David García-Heredia, Mercedes Martín-Benito   +3 more
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Exploring the θ-vacuum structure in the functional renormalization group approach

Journal of High Energy Physics, 2022
We investigate the θ-vacuum structure and the ’t Hooft anomaly at θ = π in a simple quantum mechanical system on S 1 to scrutinize the applicability of the functional renormalization group (fRG) approach.
Kenji Fukushima, Takuya Shimazaki, Yuya Tanizaki   +2 more
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Vacuum instability due to the creation of neutral fermion with anomalous magnetic moment by magnetic-field inhomogeneities

Journal of High Energy Physics, 2021
We study neutral fermions pair creation with anomalous magnetic moment from the vacuum by time-independent magnetic-field inhomogeneity as an external background. We show that the problem is technically reduced to the problem of charged-particle creation
T. C. Adorno, Zi-Wang He, S. P. Gavrilov, D. M. Gitman   +3 more
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Quantum distillation of Hilbert spaces, semi-classics and anomaly matching

Journal of High Energy Physics, 2018
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 reinterpret it from the viewpoint of the Hilbert space. An appropriate twist
Gerald V. Dunne, Yuya Tanizaki, Mithat Ünsal   +2 more
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