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Extracting the Field Theory Description of a Quantum Many-Body System from Experimental Data
Physical Review X, 2020 Quantum field theory is a powerful tool to describe the relevant physics governing complex quantum many-body systems. Here, we develop a general pathway to extract the irreducible building blocks of quantum field theoretical descriptions and its ...
Torsten V. Zache +4 more
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Unfolded dynamics approach and quantum field theory
Journal of High Energy Physics, 2023 We study quantization of a self-interacting scalar field within the unfolded dynamics approach. To this end we find and analyze a classical unfolded system describing 4d off-shell scalar field with a general self-interaction potential.
Nikita Misuna
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Rate of cluster decomposition via Fermat-Steiner point
Journal of High Energy Physics, 2019 In quantum field theory with a mass gap correlation function between two spatially separated operators decays exponentially with the distance. This fundamental result immediately implies an exponential suppression of all higher point correlation ...
Alexander Avdoshkin +3 more
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On the S-matrix of Liouville theory
Journal of High Energy Physics, 2021 The S-matrix for each chiral sector of Liouville theory on a cylinder is computed from the loop expansion of correlation functions of a one-dimensional field theory on a circle with a non-local kinetic energy and an exponential potential.
George Jorjadze, Stefan Theisen
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Spectral form factor as an OTOC averaged over the Heisenberg group
Physics Letters B, 2019 We prove that in bosonic quantum mechanics the two-point spectral form factor can be obtained as an average of the two-point out-of-time ordered correlation function, with the average taken over the Heisenberg group.
Robert de Mello Koch +3 more
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Journal of High Energy Physics, 2021 We identify a nontrivial yet tractable quantum field theory model with space/time anisotropic scale invariance, for which one can exactly compute certain four-point correlation functions and their decompositions via the operator-product expansion(OPE ...
Hidehiko Shimada, Hirohiko Shimada
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European Physical Journal C: Particles and Fields, 2020 In this work, we study the impact of quantum entanglement on the two-point correlation function and the associated primordial power spectrum of mean square vacuum fluctuation in a bipartite quantum field theoretic system.
Sayantan Choudhury, Sudhakar Panda
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Convergent momentum-space OPE and bootstrap equations in conformal field theory
Journal of High Energy Physics, 2020 General principles of quantum field theory imply that there exists an operator product expansion (OPE) for Wightman functions in Minkowski momentum space that converges for arbitrary kinematics.
Marc Gillioz +3 more
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Quantum kinetic theory of metal clusters in an intense electromagnetic field
Condensed Matter Physics, 2004 A quantum kinetic theory for weakly inhomogeneous charged particle systems is derived within the framework of nonequilibrium Green's functions. The results are of relevance for valence electrons of metal clusters as well as for confined Coulomb systems ...
M.Bonitz, J.W.Dufty
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The edge of chaos: quantum field theory and deep neural networks
SciPost Physics, 2022 We explicitly construct the quantum field theory corresponding to a general class of deep neural networks encompassing both recurrent and feedforward architectures.
Kevin T. Grosvenor, Ro Jefferson
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