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General boundary quantum field theory: Timelike hypersurfaces in Klein-Gordon theory [PDF]
Physical Review D, 2005 We show that the real massive Klein-Gordon theory admits a description in terms of states on various timelike hypersurfaces and amplitudes associated to regions bounded by them. This realizes crucial elements of the general boundary framework for quantum
M. Abramowitz, R. Jackiw, Robert Oeckl
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Boundary Operators in Quantum Field Theory [PDF]
International Journal of Modern Physics A, 2000 The fundamental laws of physics can be derived from the requirement of invariance under suitable classes of transformations on the one hand, and from the need for a well-posed mathematical theory on the other hand.
Esposito G. +5 more
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Boundary terms in quantum field theory and the spin structure of QCD
Nuclear Physics B, 2014 Determining how boundary terms behave in a quantum field theory (QFT) is crucial for understanding the dynamics of the theory. Nevertheless, boundary terms are often neglected using classical-type arguments which are no longer justified in the full ...
Peter Lowdon
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Critical 1- and 2-point spin correlations for the O(2) model in 3d bounded domains
Journal of High Energy Physics, 2021 We study the critical properties of the 3d O(2) universality class in bounded domains through Monte Carlo simulations of the clock model. We use an improved version of the latter, chosen to minimize finite-size corrections at criticality, with 8 ...
Alessandro Galvani +2 more
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Two point functions in defect CFTs
Journal of High Energy Physics, 2021 This paper is designed to be a practical tool for constructing and investigating two-point correlation functions in defect conformal field theory, directly in physical space, between any two bulk primaries or between a bulk primary and a defect primary ...
Christopher P. Herzog, Abhay Shrestha
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O(N) models with boundary interactions and their long range generalizations
Journal of High Energy Physics, 2020 We study the critical properties of scalar field theories in d + 1 dimensions with O(N) invariant interactions localized on a d-dimensional boundary. By a combination of large N and epsilon expansions, we provide evidence for the existence of non-trivial
Simone Giombi, Himanshu Khanchandani
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Harvesting correlations from vacuum quantum fields in the presence of a reflecting boundary
Journal of High Energy Physics, 2023 We explore correlations harvesting by two static detectors locally interacting with vacuum massless scalar fields in the presence of an infinite perfectly reflecting boundary.
Zhihong Liu, Jialin Zhang, Hongwei Yu
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Operator expansions, layer susceptibility and two-point functions in BCFT
Journal of High Energy Physics, 2020 We show that in boundary CFTs, there exists a one-to-one correspondence between the boundary operator expansion of the two-point correlation function and a power series expansion of the layer susceptibility.
Parijat Dey, Tobias Hansen, Mykola Shpot
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Bootstrapping boundary-localized interactions
Journal of High Energy Physics, 2020 We study conformal boundary conditions for the theory of a single real scalar to investigate whether the known Dirichlet and Neumann conditions are the only possibilities.
Connor Behan +3 more
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Holographic quantum states [PDF]
, 2010 We show how continuous matrix product states of quantum field theories can be described in terms of the dissipative non-equilibrium dynamics of a lower-dimensional auxiliary boundary field theory.
Frank Verstraete +5 more
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