Results 51 to 60 of about 13,864,114 (205)

Remarks on the influence of quantum vacuum fluctuations over a charged test particle near a conducting wall

open access: yesJournal of High Energy Physics, 2019
Quantum vacuum fluctuations of the electromagnetic field in empty space seem not to produce observable effects over the motion of a charged test particle.
V. A. De Lorenci, C. C. H. Ribeiro
doaj   +1 more source

Integrable quantum field theories, in the bulk and with a boundary [PDF]

open access: yes, 2000
In this thesis, we consider the massive field theories in 1+1 dimensions known as affine Toda quantum field theories. These have the special property that they possess an infinite number of conserved quantities, a feature which greatly simplifies their ...
Mattsson, P.A., Mattsson, Peter Aake
core  

Renyi relative entropies and renormalization group flows

open access: yesJournal of High Energy Physics, 2018
Quantum Renyi relative entropies provide a one-parameter family of distances between density matrices, which generalizes the relative entropy and the fidelity. We study these measures for renormalization group flows in quantum field theory.
Horacio Casini   +3 more
doaj   +1 more source

Defect extremal surface as the holographic counterpart of Island formula

open access: yesJournal of High Energy Physics, 2021
We propose defect extremal surface as the holographic counterpart of boundary quantum extremal surface. The defect extremal surface is defined by minimizing the Ryu-Takayanagi surface corrected by the defect theory.
Feiyu Deng, Jinwei Chu, Yang Zhou
doaj   +1 more source

Affine toda field theories on a half-line [PDF]

open access: yes, 1999
This thesis is primarily concerned with the reflection factors of affine Toda field theories on the half-line x ≤ 0. First, we consider the classical background configurations of low rank a,(^(1)) affine Toda theories with a boundary, constructed by the ...
Perkins, Michael Gordon, Perkins, M.G.
core  

Boundary sinh-Gordon model and its supersymmetric extension [PDF]

open access: yes, 1999
Three different aspects of the sinh-Gordon model are explored in this thesis. We begin, in chapter one, with a summary of the model and the necessary background. Chapter two studies the model with two boundary conditions.
Ablikim, M., Ablikim, Medina
core  

Four-point boundary connectivities in critical two-dimensional percolation from conformal invariance

open access: yesJournal of High Energy Physics, 2018
We conjecture an exact form for an universal ratio of four-point cluster connectivities in the critical two-dimensional Q-color Potts model. We also provide analogous results for the limit Q → 1 that corresponds to percolation where the observable has a ...
Giacomo Gori, Jacopo Viti
doaj   +1 more source

Quantum Field Theory with Dynamical Boundary Conditions and the Casimir Effect

open access: yes, 2023
We study a coupled system that describes the interacting dynamics between a bulk field, confined to a finite region with timelike boundary, and a boundary observable. In our system the dynamics of the boundary observable prescribes dynamical boundary conditions for the bulk field.
Juárez-Aubry, Benito A., Weder, Ricardo
openaire   +2 more sources

Evaluation of Correlation Functions in Integrable Quantum Field Theories [PDF]

open access: yes, 2012
The aim of this thesis is to explore correlation functions in two dimensional quantum field theories in two distinct ways. In part I a new method for calculating the differential equations parametrising the correlation functions of twist fields ...
SILK, JAMES,BRIAN, Silk, James Brian
core  

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