Keresés
1 találatból megjelenítve: 1-43
Cím: Effective potentials and kink spectra in non-integrable perturbed conformal field theories
Szerző: ;
Dátum: 2009
Feltöltve: 2020-08-11
(2009)
We analyze the evolution of the effective potential and the particle
spectrum of two-parameter families of non-integrable quantum field
theories. These theories are defined by deformations of conformal
minimal models M-m ...
Cím: Form factors in finite volume I: Form factor bootstrap and truncated conformal space
Szerző: ;
Dátum: 2008
Feltöltve: 2020-08-11
(2008)
We describe the volume dependence of matrix elements of local fields to
all orders in inverse powers of the volume (i.e., only neglecting
contributions that decay exponentially with volume). Using the scaling
Lee-Yang model ...
Cím: Form factors in finite volume II: Disconnected terms and finite temperature correlators
Szerző: ;
Dátum: 2008
Feltöltve: 2020-08-11
(2008)
Continuing the investigation started in a previous work, we consider
form factors of integrable quantum field theories in finite volume,
extending our investigation to matrix elements with disconnected
pieces. Numerical ...
Cím: Form factors of boundary exponential operators in the sinh-Gordon model
Szerző:
Dátum: 2008
Feltöltve: 2020-08-11
(2008)
Using the recently introduced boundary form factor bootstrap equations,
the form factors of boundary exponential operators in the sinh-Gordon
model are constructed. We also give a general method to evaluate the
ultraviolet ...
Cím: Finite temperature expectation values of boundary operators
Szerző:
Dátum: 2008
Feltöltve: 2020-08-11
(2008)
A conjecture is presented for the thermal one-point function of
boundary operators in integrable boundary quantum field theories in
terms of form factors. It is expected to have applications in studying
boundary critical ...
Cím: Excited state g-functions from the truncated conformal space
Szerző: ;
Dátum: 2012
Feltöltve: 2020-08-11
(2012)
In this paper we consider excited state g-functions, that is, overlaps between boundary states and excited states in boundary conformal field theory. We find a new method to calculate these overlaps numerically using a ...
Cím: Sine-Gordon form factors in finite volume
Szerző: ;
Dátum: 2011
Feltöltve: 2020-08-11
(2011)
We compare form factors in sine-Gordon theory, obtained via the bootstrap, to finite volume matrix elements computed using the truncated conformal space approach. For breather form factors, this is essentially a straightforward ...
Cím: Breather boundary form factors in sine-Gordon theory
Szerző: ;
Dátum: 2011
Feltöltve: 2020-08-11
(2011)
A previously conjectured set of exact form factors of boundary exponential operators in the sinh-Gordon model is tested against numerical results from boundary truncated conformal space approach in boundary sine-Gordon ...
Cím: Boundary form factors in finite volume
Szerző: ;
Dátum: 2008
Feltöltve: 2020-08-11
(2008)
We describe the volume dependence of matrix elements of local boundary
fields to all orders in inverse powers of the volume. Using the scaling
boundary Lee-Yang model as testing ground, we compare the matrix
elements ...
Cím: Sine-Gordon multisoliton form factors in finite volume
Szerző: ; ;
Dátum: 2012
Feltöltve: 2020-08-11
(2012)
Cím: One-point functions in finite volume/temperature: a case study
Szerző: ; ;
Dátum: 2013
Feltöltve: 2020-08-10
(2013)
We consider finite volume (or equivalently, finite temperature)
expectation values of local operators in integrable quantum
field theories using a combination of numerical and analytical
approaches. It is shown that the ...
Cím: Spectral expansion for finite temperature two-point functions and clustering
Szerző: ;
Dátum: 2012
Feltöltve: 2020-08-11
(2012)
Recently, the spectral expansion of finite temperature two-point functions in integrable quantum field theories was constructed using a finite volume regularization technique and the application of multidimensional residues. ...
Cím: The k-folded sine-Gordon model in finite volume
Szerző: ; ; ;
Dátum: 2000
Feltöltve: 2020-08-07
(2000)
We consider the k-folded sine-Gordon model, obtained from the usual
version by identifying the scalar field after k periods of the cosine
potential. We examine (1) the ground state energy split, (2) the lowest
lying ...
Cím: Boundary states and finite size effects in sine-Gordon model with Neumann boundary condition
Szerző: ; ;
Dátum: 2001
Feltöltve: 2020-08-07
(2001)
The sine-Gordon model with Neumann boundary condition is investigated.
Using the bootstrap principle the spectrum of boundary bound states is
established. Somewhat surprisingly it is found that Coleman-Thun
diagrams and ...
Cím: The spectrum of boundary states in sine-Gordon model with integrable boundary conditions
Szerző: ; ; ;
Dátum: 2002
Feltöltve: 2020-08-07
(2002)
The bound state spectrum and the associated reflection factors
are
determined for the sine-Gordon model with arbitrary integrable
boundary
condition by closing the bootstrap. Comparing the symmetries of
the
bound state ...
Cím: Finite size effects in boundary sine-Gordon theory
Szerző: ; ;
Dátum: 2002
Feltöltve: 2020-08-07
(2002)
We examine the finite volume spectrum and boundary energy in boundary
sine-Gordon theory, based on our recent results obtained by closing the
boundary bootstrap. The spectrum and the reflection factors are checked
against ...
Cím: RSOS revisited
Szerző: ;
Dátum: 2002
Feltöltve: 2020-08-07
(2002)
We investigate the issues of unitarity and reality of the spectrum for
the imaginary coupled affine Toda field theories based on a(1)((1)) and
a(2)((2)) and the perturbed minimal models that arise from their
various RSOS ...
Cím: Boundary reduction formula
Szerző: ; ;
Dátum: 2002
Feltöltve: 2020-08-07
(2002)
An asymptotic theory is developed for general non-integrable
boundary
quantum field theory in 1 + 1 dimensions based on the Lagrangian
description. Reflection matrices are defined to connect
asymptotic
states and are ...
Cím: Spectrum of boundary states in N=1 SUSY sine-Gordon theory
Szerző: ; ;
Dátum: 2002
Feltöltve: 2020-08-07
(2002)
We consider N = 1 supersymmetric sine-Gordon theory (SSG) with
supersymmetric integrable boundary conditions (boundary SSG = BSSG). We
find two possible ways to close the boundary bootstrap for this model,
corresponding ...
Cím: On perturbative quantum field theory with boundary
Szerző: ; ;
Dátum: 2004
Feltöltve: 2020-08-07
(2004)
Boundary quantum field theory is investigated in the Lagrangian
framework. Models are defined perturbatively around the Neumann
boundary condition. The analyticity properties of the Green functions
are analyzed: Landau ...
Cím: Nonperturbative study of the two-frequency sine-Gordon model
Szerző: ; ; ;
Dátum: 2001
Feltöltve: 2020-08-07
(2001)
The two-frequency sine-Gordon model is examined. The focus is mainly on
the case when the ratio of the frequencies is 1/2, given the recent
interest in the literature. We discuss the model both in a perturbative
(form ...
Cím: SUSY sine-Gordon theory as a perturbed conformal field theory and finite size effects
Szerző: ; ; ; ;
Dátum: 2004
Feltöltve: 2020-08-07
(2004)
We consider SUSY sine-Gordon theory in the framework of perturbed
conformal field theory. Using an argument from Zamolodchikov, we obtain
the vacuum structure and the kink adjacency diagram of the theory,
which is cross-checked ...
Cím: Double sine-Gordon model revisited
Szerző: ;
Dátum: 2006
Feltöltve: 2020-08-07
(2006)
We reconsider the mass spectrum of double sine-Gordon theory where
recent semiclassical results called into question the previously
accepted picture. We use the truncated conformal space approach (TCSA)
to investigate the ...
Cím: (Semi)classical analysis of sine-Gordon theory on a strip
Szerző: ; ;
Dátum: 2004
Feltöltve: 2020-08-07
(2004)
Classical sine-Gordon theory on a strip with integrable boundary
conditions is considered analyzing the static (ground state) solutions,
their existence, energy and stability under small perturbations. The
classical analogue ...
Cím: On the boundary form factor program
Szerző: ; ;
Dátum: 2006
Feltöltve: 2020-08-07
(2006)
Boundary form factor axioms are derived for the matrix elements of
local boundary operators in integrable (1 + 1)-dimensional boundary
quantum field theories using the analyticity properties of correlators;
via the boundary ...
Cím: Finite size effects in quantum field theories with boundary from scattering data
Szerző: ; ;
Dátum: 2005
Feltöltve: 2020-08-07
(2005)
We derive a relation between leading finite size corrections for a (1 +
1)-dimensional quantum field theory on a strip and scattering data,
which is very similar in spirit to the approach pioneered by Luscher
for periodic ...
Cím: Characterization of resonances using finite size effects
Szerző: ;
Dátum: 2006
Feltöltve: 2020-08-07
(2006)
We develop methods to extract resonance widths from finite volume
spectra of (1 + 1)-dimensional quantum field theories. Our two methods
are based on Luscher's description of finite size corrections, and are
dubbed the ...
Cím: Boundary one-point function, Casimir energy and boundary state formalism in D+1 dimensional QFT
Szerző: ; ;
Dátum: 2007
Feltöltve: 2020-08-07
(2007)
We consider quantum field theories with boundary on a codimension one
hyperplane. Using 1+1 dimensional examples, we clarify the relation
between three parameters characterizing one-point functions, finite
size corrections ...
Cím: NLIE for hole excited states in the sine-Gordon model with two boundaries
Szerző: ; ; ; ;
Dátum: 2005
Feltöltve: 2020-08-07
(2005)
We derive a nonlinear integral equation (NLIE) for some bulk excited
states of the sine-Gordon model on a finite interval with general
integrable boundary interactions, including boundary terms proportional
to the first ...
Cím: Casimir force between planes as a boundary finite size effect
Szerző: ; ;
Dátum: 2006
Feltöltve: 2020-08-07
(2006)
The ground state energy of a boundary quantum field theory is derived
in planar geometry in D + 1-dimensional spacetime. It provides a
universal expression for the Casimir energy which exhibits its
dependence on the boundary ...
Cím: Spectrum of local boundary operators from boundary form factor bootstrap
Szerző: ;
Dátum: 2007
Feltöltve: 2020-08-07
(2007)
Using the recently introduced boundary form factor bootstrap equations,
we map the complete space of their solutions for the boundary version
of the scaling Lee-Yang model and sinh-Gordon theory. We show that the
complete ...
Cím: Quantum affine symmetry and scattering amplitudes of the imaginary coupled d(4)((3)) affine Toda field theory
Szerző:
Dátum: 1997
Feltöltve: 2020-08-07
(1997)
An exact S-matrix is conjectured for the imaginary coupled d(4)((3))
affine Toda field theory, using the U-q(g(2)((1))) symmetry. It is
shown that this S-matrix is consistent with the results for the case of
real coupling ...
Cím: A(2) TODA THEORY IN REDUCED WZNW FRAMEWORK AND THE REPRESENTATIONS OF THE W-ALGEBRA
Szerző: ; ;
Dátum: 1992
Feltöltve: 2020-08-07
(1992)
Using the reduced WZNW formulation we analyse the classical W-orbit
content of the space of classical solutions of the A2 Toda theory. We
define the quantized Toda field as a periodic primary field of the
W-algebra satifying ...
Cím: FREE-FIELD REPRESENTATION FOR THE O(3) NONLINEAR SIGMA-MODEL AND BOOTSTRAP FUSION
Szerző: ;
Dátum: 1995
Feltöltve: 2020-08-07
(1995)
Cím: The R-matrix of the U-q(d(4)((3))) algebra and g(2)((1)) affine Toda field theory
Szerző:
Dátum: 1997
Feltöltve: 2020-08-07
(1997)
The R-matrix of the U-q(d(4)((3))) algebra is constructed in the
8-dimensional fundamental representation. Using this result, an exact
S-matrix is conjectured for the imaginary coupled g(2)((1)) affine Toda
field theory, ...
Cím: Truncated conformal space at c=1, nonlinear integral equation and quantization rules for multi-soliton states
Szerző: ; ;
Dátum: 1998
Feltöltve: 2020-08-07
(1998)
We develop truncated conformal space (TCS) technique for perturbations
of c = 1 conformal field theories. We use it to give the first
numerical evidence of the validity of the non-linear integral equation
(NLIE) derived ...
Cím: Non-linear integral equation and finite volume spectrum of sine-Gordon theory
Szerző: ; ;
Dátum: 1999
Feltöltve: 2020-08-07
(1999)
We examine the connection between the non-linear integral equation
(NLIE) derived from light-cone lattice and sine-Gordon quantum field
theory, considered as a perturbed c = 1 conformal field theory. After
clarifying some ...
Cím: Form Factors of the Sausage Model Obtained with Bootstrap Fusion from Sine-Gordon Theory
Szerző: ;
Dátum: 1996
Feltöltve: 2020-08-07
(1996)
We continue the investigation of massive integrable models by means of the bootstrap fusion procedure started in our previous work an the O(3) nonlinear sigma model. Using an analogy with the SU(2) Thirring model and the ...
Cím: Scaling functions in the odd charge sector of sine-Gordon massive Thirring theory
Szerző: ; ;
Dátum: 1998
Feltöltve: 2020-08-07
(1998)
A non-linear integral equation (NLIE) governing the finite size effects
of excited states of even topological charge in the sine-Gordon (sG) /
massive Thirring (mTh) field theory, deducible from a light-cone
lattice ...
Cím: A new RSOS restriction of the Zhiber-Mikhailov-Shabat model and Phi((1,5)) perturbations of non-unitary minimal models
Szerző:
Dátum: 1997
Feltöltve: 2020-08-07
(1997)
The RSOS restriction of the Zhiber-Mikhailov-Shabat (ZMS) model is
investigated. It is shown that in addition to the usual RSOS
restriction, corresponding to Phi((1,2)) and Phi((2,1)) perturbations
of minimal CFT, there ...
Cím: On the relation between Phi((1,2)) and Phi((1,5)) perturbed minimal models and unitarity
Szerző: ; ;
Dátum: 1997
Feltöltve: 2020-08-07
(1997)
We consider the RSOS S-matrices of the Phi((1,5)) perturbed minimal
models which have recently been found in a companion paper. These
S-matrices have some interesting properties, in particular, unitarity
may be broken in ...
Cím: Non-unitarity in quantum affine Toda theory and perturbed conformal field theory
Szerző: ;
Dátum: 1999
Feltöltve: 2020-08-07
(1999)
There has been some debate about the validity of quantum affine Toda
field theory at imaginary coupling, owing to the non-unitarity of the
action, and consequently of its usefulness as a model of perturbed
conformal field ...
Cím: Non-linear integral equation and finite volume spectrum of minimal models perturbed by Phi((1,3))
Szerző: ; ;
Dátum: 2000
Feltöltve: 2020-08-07
(2000)
We describe an extension of the non-linear integral equation (NLIE)
method to Virasoro minimal models perturbed by the relevant operator
Phi((1,3)). Along the way, we also complete our previous studies of the
finite volume ...