Results 141 to 150 of about 11,120,519 (277)
Iterated Perturbation Theory for Mott Insulators in a Static Electric Field with Optical Phonons
physica status solidi (b), Volume 261, Issue 9, September 2024.Schematic representation of the current flowing within the lattice. When the field is applied, electrons can tunnel through the former gap of an adjacent site, creating the necessary states to populate the conduction band of a site which is twice lattice spacings apart.
Tommaso Maria Mazzocchi, Enrico Arrigoni
wiley +1 more source
What can be measured asymptotically?
Journal of High Energy PhysicsWe consider asymptotic observables in quantum field theories in which the S-matrix makes sense. We argue that in addition to scattering amplitudes, a whole compendium of inclusive observables exists where the time-ordering is relaxed.
Simon Caron-Huot +3 more
doaj +1 more source
Limits of TMD evolution in SIDIS at moderate Q
EPJ Web of Conferences, 2015 We investigate semi-inclusive deep inelastic scattering measurements in the region of relatively small Q, where sensitivity to nonperturbative transverse momentum dependence can dominate the evolution.
Gamberg Leonard
doaj +1 more source
Nonperturbative effects of Topological Theta-term
, 2011 We study the effects of a topological Theta-term on 2+1 dimensional principal chiral models (PCM), which are nonlinear sigma models defined on Lie group manifolds. We find that when Theta = pi, the nature of the disordered phase of the principal chiral model is strongly affected by the topological term: it is either a gapless conformal field theory, or
Xu, Cenke, Ludwig, Andreas W. W.
openaire +2 more sources
Reducible contributions to quantum electrodynamics in external fields
Journal of High Energy Physics, 2019 We consider one-particle reducible (1PR) contributions to QED and scalar QED processes in external fields, at one-loop and two-loop order. We investigate three cases in detail: constant crossed fields, constant magnetic fields, and plane waves.
Naser Ahmadiniaz +2 more
doaj +1 more source
Electroweak vacuum stability in the Higgs-Dilaton theory
Journal of High Energy Physics, 2017 We study the stability of the Electroweak (EW) vacuum in a scale-invariant extension of the Standard Model and General Relativity, known as a Higgs-Dilaton theory.
A. Shkerin
doaj +1 more source
Tadpole diagrams in constant electromagnetic fields
Journal of High Energy Physics, 2017 We show how all possible one-particle reducible tadpole diagrams in constant electromagnetic fields can be constructed from one-particle irreducible constant-field diagrams.
Felix Karbstein
doaj +1 more source
Experimental targets for photon couplings of the QCD axion
Journal of High Energy Physics, 2018 The QCD axion’s coupling to photons is often assumed to lie in a narrow band as a function of the axion mass. We demonstrate that several simple mechanisms, in addition to the photophilic clockwork axion already in the literature, can significantly ...
Prateek Agrawal +3 more
doaj +1 more source
Possible Evidence for Substantial Nonperturbative Quantum-Chromodynamic Effects [PDF]
, 1982 R. Michael Barnett
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Nonperturbative effects in equilibrium finite-temperature scalar field theory [PDF]
, 1985 Hideaki Aoyama, Helen R. Quinn
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