Results 21 to 30 of about 17,645 (290)
General boundary quantum field theory: Timelike hypersurfaces in the Klein-Gordon theory [PDF]
Physical Review D, 2006 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 field theory.
Robert Oeckl
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Towards quantum field theory on spacetimes with boundaries [PDF]
The Fourteenth Marcel Grossmann Meeting, 2017 Algebraic quantization has been applied on the class of globally hyperbolic spacetime for many decades, leading to remarkable results. Nonetheless, the presence of a boundary calls for a separate treatment, since, in general, it breaks global hyperbolicity and it requires the introduction of boundary conditions to the field equation. Although a general
Gabriele Nosari
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Quantum field theory with boundary conditions at the horizons
International Journal of Modern Physics D, 2023 A procedure to derive a unitary evolution law for a quantised black hole has been proposed by the author. The proposal implies several assumptions, which seem almost unavoidable to this author. We start off with the question how to describe the energy eigenstates of a black hole.
Gerard’t Hooft
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Integrable Quantum Field Theories, in the Bulk and with a Boundary [PDF]
, 2001 Ph.D.
Peter Mattsson
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Quantum statistical correlations in thermal field theories: Boundary effective theory [PDF]
Physical Review D, 2010 We show that the one-loop effective action at finite temperature for a scalar field with quartic interaction has the same renormalized expression as at zero temperature if written in terms of a certain classical field $ϕ_c$, and if we trade free propagators at zero temperature for their finite-temperature counterparts.
A. Bessa +3 more
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Topological quantum field theories on manifolds with a boundary [PDF]
Communications in Mathematical Physics, 1991 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Siye Wu
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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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Boundary state in an integrable quantum field theory out of equilibrium
Physics Letters B, 2014 We study a quantum quench of the mass and the interaction in the Sinh-Gordon model starting from a large initial mass and zero initial coupling. Our focus is on the determination of the expansion of the initial state in terms of post-quench excitations. We argue that the large energy profile of the involved excitations can be relevant for the late time
Spyros Sotiriadis +2 more
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In–out propagator in de Sitter space from general boundary quantum field theory
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2015 Daniele Colosi
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Boundary bound states in integrable quantum field theories [PDF]
, 2000 The purpose of this talk is to sketch some recent progress which has been made in calculating non-perturbatively the reflection factors for the sinh-Gordon model restricted to a half-line by integrable boundary conditions. The essential idea is to calculate the energy spectrum of boundary breathers in two independent ways; firstly by using the boundary
E. Corrigan
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