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Now showing items 1-43 of 1

Title: Form factors in finite volume II: Disconnected terms and finite temperature correlators

Author: ;

Date: 2008

Submitted: 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 ...

Title: Form factors of boundary exponential operators in the sinh-Gordon model

Author:

Date: 2008

Submitted: 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 ...

Title: Form factors in finite volume I: Form factor bootstrap and truncated conformal space

Author: ;

Date: 2008

Submitted: 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 ...

Title: Finite temperature expectation values of boundary operators

Author:

Date: 2008

Submitted: 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 ...

Title: Effective potentials and kink spectra in non-integrable perturbed conformal field theories

Author: ;

Date: 2009

Submitted: 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 ...

Title: One-point functions in finite volume/temperature: a case study

Author: ; ;

Date: 2013

Submitted: 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 ...

Title: Boundary form factors in finite volume

Author: ;

Date: 2008

Submitted: 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 ...

Title: Sine-Gordon form factors in finite volume

Author: ;

Date: 2011

Submitted: 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 ...

Title: Breather boundary form factors in sine-Gordon theory

Author: ;

Date: 2011

Submitted: 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 ...

Title: Excited state g-functions from the truncated conformal space

Author: ;

Date: 2012

Submitted: 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 ...

Title: Sine-Gordon multisoliton form factors in finite volume

Author: ; ;

Date: 2012

Submitted: 2020-08-11

(2012)

Title: On the boundary form factor program

Author: ; ;

Date: 2006

Submitted: 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 ...

Title: RSOS revisited

Author: ;

Date: 2002

Submitted: 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 ...

Title: Boundary reduction formula

Author: ; ;

Date: 2002

Submitted: 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 ...

Title: Spectral expansion for finite temperature two-point functions and clustering

Author: ;

Date: 2012

Submitted: 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. ...

Title: Characterization of resonances using finite size effects

Author: ;

Date: 2006

Submitted: 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 ...

Title: Spectrum of boundary states in N=1 SUSY sine-Gordon theory

Author: ; ;

Date: 2002

Submitted: 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 ...

Title: Boundary one-point function, Casimir energy and boundary state formalism in D+1 dimensional QFT

Author: ; ;

Date: 2007

Submitted: 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 ...

Title: Spectrum of local boundary operators from boundary form factor bootstrap

Author: ;

Date: 2007

Submitted: 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 ...

Title: A(2) TODA THEORY IN REDUCED WZNW FRAMEWORK AND THE REPRESENTATIONS OF THE W-ALGEBRA

Author: ; ;

Date: 1992

Submitted: 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 ...

Title: FREE-FIELD REPRESENTATION FOR THE O(3) NONLINEAR SIGMA-MODEL AND BOOTSTRAP FUSION

Author: ;

Date: 1995

Submitted: 2020-08-07

(1995)

Title: On perturbative quantum field theory with boundary

Author: ; ;

Date: 2004

Submitted: 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 ...

Title: SUSY sine-Gordon theory as a perturbed conformal field theory and finite size effects

Author: ; ; ; ;

Date: 2004

Submitted: 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 ...

Title: Form Factors of the Sausage Model Obtained with Bootstrap Fusion from Sine-Gordon Theory

Author: ;

Date: 1996

Submitted: 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 ...

Title: (Semi)classical analysis of sine-Gordon theory on a strip

Author: ; ;

Date: 2004

Submitted: 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 ...

Title: Finite size effects in quantum field theories with boundary from scattering data

Author: ; ;

Date: 2005

Submitted: 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 ...

Title: NLIE for hole excited states in the sine-Gordon model with two boundaries

Author: ; ; ; ;

Date: 2005

Submitted: 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 ...

Title: Casimir force between planes as a boundary finite size effect

Author: ; ;

Date: 2006

Submitted: 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 ...

Title: Double sine-Gordon model revisited

Author: ;

Date: 2006

Submitted: 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 ...

Title: The R-matrix of the U-q(d(4)((3))) algebra and g(2)((1)) affine Toda field theory

Author:

Date: 1997

Submitted: 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, ...

Title: Truncated conformal space at c=1, nonlinear integral equation and quantization rules for multi-soliton states

Author: ; ;

Date: 1998

Submitted: 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 ...

Title: Non-linear integral equation and finite volume spectrum of sine-Gordon theory

Author: ; ;

Date: 1999

Submitted: 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 ...

Title: Scaling functions in the odd charge sector of sine-Gordon massive Thirring theory

Author: ; ;

Date: 1998

Submitted: 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 ...

Title: Non-unitarity in quantum affine Toda theory and perturbed conformal field theory

Author: ;

Date: 1999

Submitted: 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 ...

Title: Non-linear integral equation and finite volume spectrum of minimal models perturbed by Phi((1,3))

Author: ; ;

Date: 2000

Submitted: 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 ...

Title: The k-folded sine-Gordon model in finite volume

Author: ; ; ;

Date: 2000

Submitted: 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 ...

Title: Nonperturbative study of the two-frequency sine-Gordon model

Author: ; ; ;

Date: 2001

Submitted: 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 ...

Title: Boundary states and finite size effects in sine-Gordon model with Neumann boundary condition

Author: ; ;

Date: 2001

Submitted: 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 ...

Title: The spectrum of boundary states in sine-Gordon model with integrable boundary conditions

Author: ; ; ;

Date: 2002

Submitted: 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 ...

Title: Finite size effects in boundary sine-Gordon theory

Author: ; ;

Date: 2002

Submitted: 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 ...

Title: A new RSOS restriction of the Zhiber-Mikhailov-Shabat model and Phi((1,5)) perturbations of non-unitary minimal models

Author:

Date: 1997

Submitted: 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 ...

Title: On the relation between Phi((1,2)) and Phi((1,5)) perturbed minimal models and unitarity

Author: ; ;

Date: 1997

Submitted: 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 ...

Title: Quantum affine symmetry and scattering amplitudes of the imaginary coupled d(4)((3)) affine Toda field theory

Author:

Date: 1997

Submitted: 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 ...