Light bending from eikonal in worldline quantum field theory
Sign Up to like & getrecommendations! Published in 2022 at "Journal of High Energy Physics"
DOI: 10.1007/jhep02(2022)209
Abstract: Using the worldline quantum field theory (WQFT) formalism for classical scattering, we study the deflection of light by a heavy massive spinless/spinning object. WQFT requires the use of the worldline dressed propagator of a photon… read more here.
Keywords: field theory; quantum field; worldline quantum;
More on complexity of operators in quantum field theory
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep03(2019)161
Abstract: A bstractRecently it has been shown that the complexity of SU(n) operator is determined by the geodesic length in a bi-invariant Finsler geometry, which is constrained by some symmetries of quantum field theory. It is… read more here.
Keywords: quantum field; field theory; complexity; geometry ... See more keywords
Comments on the quantum field theory of the Coulomb gas formalism
Sign Up to like & getrecommendations! Published in 2020 at "Journal of High Energy Physics"
DOI: 10.1007/jhep04(2021)136
Abstract: Abstract The holomorphic Coulomb gas formalism, as developed by Feigin-Fuchs, Dotsenko-Fateev and Felder, is a set of rules for computing minimal model observables using free field techniques. We attempt to derive and clarify these rules… read more here.
Keywords: field; coulomb gas; model; quantum field ... See more keywords
On the complexity of quantum field theory
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DOI: 10.1007/jhep06(2025)215
Abstract: We initiate a study of the complexity of quantum field theories (QFTs) by proposing a measure of information contained in a QFT and its observables. We show that from minimal assertions, one is naturally led… read more here.
Keywords: quantum field; complexity; complexity quantum; field theory ... See more keywords
Entanglement in Lifshitz-type quantum field theories
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DOI: 10.1007/jhep07(2017)120
Abstract: A bstractWe study different aspects of quantum entanglement and its measures, including entanglement entropy in the vacuum state of a certain Lifshitz free scalar theory. We present simple intuitive arguments based on “non-local” effects of… read more here.
Keywords: quantum field; theory; type quantum; entanglement lifshitz ... See more keywords
Perturbative post-quench overlaps in quantum field theory
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep08(2019)047
Abstract: Abstract In analytic descriptions of quantum quenches, the overlaps between the initial pre-quench state and the eigenstates of the time evolving Hamiltonian are crucial ingredients. We construct perturbative expansions of these overlaps in quantum field… read more here.
Keywords: post quench; quench; quantum field; overlaps quantum ... See more keywords
Out-of-time-order asymptotic observables are quasi-isomorphic to time-ordered amplitudes
Sign Up to like & getrecommendations! Published in 2024 at "Journal of High Energy Physics"
DOI: 10.1007/jhep08(2024)074
Abstract: Asymptotic observables in quantum field theory beyond the familiar S-matrix have recently attracted much interest, for instance in the context of gravity waveforms. Such observables can be understood in terms of Schwinger-Keldysh-type ‘amplitudes’ computed by… read more here.
Keywords: quantum field; time; quasi isomorphic; algebra ... See more keywords
The TT¯$$ T\overline{T} $$ deformation of quantum field theory as random geometry
Sign Up to like & getrecommendations! Published in 2018 at "Journal of High Energy Physics"
DOI: 10.1007/jhep10(2018)186
Abstract: A bstractWe revisit the results of Zamolodchikov and others on the deformation of two-dimensional quantum field theory by the determinant det T of the stress tensor, commonly referred to as TT¯$$ T\overline{T} $$. Infinitesimally this… read more here.
Keywords: field theory; deformation; geometry; quantum field ... See more keywords
Localized States in Quantum Field Theory
Sign Up to like & getrecommendations! Published in 2017 at "Advances in Applied Clifford Algebras"
DOI: 10.1007/s00006-018-0904-5
Abstract: Localized states in relativistic quantum field theories are usually considered as problematic, because of their seemingly strange (noncovariant) behavior under Lorentz transformations, and because they can spread faster than light. We point out that a… read more here.
Keywords: localized states; quantum field; field; field theory ... See more keywords
Avoiding Haag’s Theorem with Parameterized Quantum Field Theory
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DOI: 10.1007/s10701-017-0065-8
Abstract: Under the normal assumptions of quantum field theory, Haag’s theorem states that any field unitarily equivalent to a free field must itself be a free field. Unfortunately, the derivation of the Dyson series perturbation expansion… read more here.
Keywords: field theory; field; haag theorem; quantum field ... See more keywords
Particle Trajectories for Quantum Field Theory
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DOI: 10.1007/s10701-018-0140-9
Abstract: The formulation of quantum mechanics developed by Bohm, which can generate well-defined trajectories for the underlying particles in the theory, can equally well be applied to relativistic quantum field theories to generate dynamics for the… read more here.
Keywords: field theory; quantum field; particle trajectories; theory ... See more keywords