Stefano Negro
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View article: Complete Minimal Form Factors for Irrelevant Deformations of Integrable Quantum Field Theory
Complete Minimal Form Factors for Irrelevant Deformations of Integrable Quantum Field Theory Open
In this paper, we present a method to compute the minimal form factors (MFFs) of diagonal integrable field theories perturbed by generalized $T\bar{T}$ perturbations. Building on existing results by the same authors, these MFFs are constru…
View article: Minimal Model Renormalization Group Flows: Noninvertible Symmetries and Nonperturbative Description
Minimal Model Renormalization Group Flows: Noninvertible Symmetries and Nonperturbative Description Open
In this Letter we continue the investigation of RG flows between Virasoro minimal models of two-dimensional conformal field theories that are protected by noninvertible symmetries. RG flows leaving unbroken a subcategory of noninvertible s…
View article: Boundary Quantum Field Theories Perturbed by ${\rm T}\bar{\rm T}$: Towards a Form Factor Program
Boundary Quantum Field Theories Perturbed by ${\rm T}\bar{\rm T}$: Towards a Form Factor Program Open
Our understanding of irrelevant perturbations of integrable quantum field theories has greatly expanded over the last decade. In particular, we know that, from a scattering theory viewpoint at least, their effect is realised as a modificat…
View article: Elevated mortality risks associated with late diagnosis of cancer in individuals with psychiatric disorders?
Elevated mortality risks associated with late diagnosis of cancer in individuals with psychiatric disorders? Open
Mental health services should focus on increasing patients' participation in cancer screening programs in order to improve their physical health and reduce mortality. This intervention could contribute to promoting equitable access to prev…
View article: On the representation of minimal form factors in integrable quantum field theory
On the representation of minimal form factors in integrable quantum field theory Open
In this paper, we propose a new representation of the minimal form factors in integrable quantum field theories. These are solutions of the two-particle form factor equations, which have no poles on the physical sheet. Their expression con…
View article: Deterministic chaos vs integrable models
Deterministic chaos vs integrable models Open
In this work we present analytical and numerical evidence that classical integrable models possessing infinitely many degrees of freedom unexpectedly exhibit some features that are typical of chaotic systems. By studying how the conserved …
View article: On the Representation of Minimal Form Factors in Integrable Quantum Field Theory
On the Representation of Minimal Form Factors in Integrable Quantum Field Theory Open
In this paper, we propose a new representation of the minimal form factors in integrable quantum field theories. These are solutions of the two-particle form factor equations, which have no poles on the physical sheet. Their expression con…
View article: Entanglement entropy from form factors in $$ \textrm{T}\overline{\textrm{T}} $$-deformed integrable quantum field theories
Entanglement entropy from form factors in $$ \textrm{T}\overline{\textrm{T}} $$-deformed integrable quantum field theories Open
A bstract In two recent papers [1, 2] we have proposed a program of study which allows us to compute the correlation functions of local and semi-local fields in generalised $$ \textrm{T}\overline{\textrm{T}} $$ -deformed integrable qu…
View article: The generalized Born oscillator and the Berry-Keating Hamiltonian
The generalized Born oscillator and the Berry-Keating Hamiltonian Open
A bstract In this study, we introduce and investigate a family of quantum mechanical models in 0 + 1 dimensions, known as generalized Born quantum oscillators. These models represent a one-parameter deformation of a specific system obtaine…
View article: Form factors and correlation functions of $$ \textrm{T}\overline{\textrm{T}} $$-deformed integrable quantum field theories
Form factors and correlation functions of $$ \textrm{T}\overline{\textrm{T}} $$-deformed integrable quantum field theories Open
A bstract The study of $$ \textrm{T}\overline{\textrm{T}} $$ -perturbed quantum field theories is an active area of research with deep connections to fundamental aspects of the scattering theory of integrable quantum field theories, g…
View article: The Generalised Born Oscillator and the Berry-Keating Hamiltonian
The Generalised Born Oscillator and the Berry-Keating Hamiltonian Open
In this study, we introduce and investigate a family of quantum mechanical models in 0+1 dimensions, known as generalized Born quantum oscillators. These models represent a one-parameter deformation of a specific system obtained by reducin…
View article: Entanglement Entropy from Form Factors in $\mathrm{T}\bar{\mathrm{T}}$-Deformed Integrable Quantum Field Theories
Entanglement Entropy from Form Factors in $\mathrm{T}\bar{\mathrm{T}}$-Deformed Integrable Quantum Field Theories Open
In two recent papers we have proposed a program of study which allows us to compute the correlation functions of local and semi-local fields in generalised $\mathrm{T}\bar{\mathrm{T}}$-deformed integrable quantum field theories. This new p…
View article: Form Factors and Correlation Functions of $\mathrm{T}\overline{\mathrm{T}}$-Deformed Integrable Quantum Field Theories
Form Factors and Correlation Functions of $\mathrm{T}\overline{\mathrm{T}}$-Deformed Integrable Quantum Field Theories Open
The study of $\mathrm{T}\overline{\mathrm{T}}$-perturbed quantum field theories is an active area of research with deep connections to fundamental aspects of the scattering theory of integrable quantum field theories, generalised Gibbs ens…
View article: Topological gauging and double current deformations
Topological gauging and double current deformations Open
A bstract We study solvable deformations of two-dimensional quantum field theories driven by a bilinear operator constructed from a pair of conserved U(1) currents J a . We propose a quantum formulation of these deformations, based on the …
View article: Completing the Bootstrap Program for $\mathrm{T}\bar{\mathrm{T}}$-Deformed Massive Integrable Quantum Field Theories
Completing the Bootstrap Program for $\mathrm{T}\bar{\mathrm{T}}$-Deformed Massive Integrable Quantum Field Theories Open
In recent years a considerable amount of attention has been devoted to the investigation of 2D quantum field theories perturbed by certain types of irrelevant operators. These are the composite field $\mathrm{T}\bar{\mathrm{T}}$ - construc…
View article: Deforming the ODE/IM correspondence with $$ \textrm{T}\overline{\textrm{T}} $$
Deforming the ODE/IM correspondence with $$ \textrm{T}\overline{\textrm{T}} $$ Open
A bstract The ODE/IM correspondence is an exact link between classical and quantum integrable models. The primary purpose of this work is to show that it remains valid after $$ \textrm{T}\overline{\textrm{T}} $$ perturbation on both s…
View article: Topological Gauging and Double Current Deformations
Topological Gauging and Double Current Deformations Open
We study solvable deformations of two-dimensional quantum field theories driven by a bilinear operator constructed from a pair of conserved $U(1)$ currents $J^a$. We propose a quantum formulation of these deformations, based on the gauging…
View article: Deforming the ODE/IM correspondence with $\mathrm{T}\bar{\mathrm{T}}$
Deforming the ODE/IM correspondence with $\mathrm{T}\bar{\mathrm{T}}$ Open
The ODE/IM correspondence is an exact link between classical and quantum integrable models. The primary purpose of this work is to show that it remains valid after $\mathrm{T}\bar{\mathrm{T}}$ perturbation on both sides of the corresponden…
View article: Deterministic Chaos vs Integrable Models
Deterministic Chaos vs Integrable Models Open
In this work we present analytical and numerical evidences that classical integrable models possessing infinitely many degrees of freedom unexpectedly exhibit some features that are typical of chaotic systems. By studying how the conserved…
View article: Thermodynamic Bethe Ansatz past turning points: the (elliptic) sinh-Gordon model
Thermodynamic Bethe Ansatz past turning points: the (elliptic) sinh-Gordon model Open
We analyze the Thermodynamic Bethe Ansatz (TBA) for various integrable S-matrices in the context of generalized $T\bar T$ deformations. We focus on the sinh-Gordon model and its elliptic deformation in both its fermionic and bosonic realiz…
View article: On Factorizable S-matrices, Generalized TTbar, and the Hagedorn\n Transition
On Factorizable S-matrices, Generalized TTbar, and the Hagedorn\n Transition Open
We study solutions of the Thermodynamic Bethe Ansatz equations for\nrelativistic theories defined by the factorizable $S$-matrix of an integrable\nQFT deformed by CDD factors. Such $S$-matrices appear under generalized TTbar\ndeformations …
View article: Geometric aspects of the ODE/IM correspondence
Geometric aspects of the ODE/IM correspondence Open
This review describes a link between Lax operators, embedded surfaces and Thermodynamic Bethe Ansatz equations for integrable quantum field theories. This surprising connection between classical and quantum models is undoubtedly one of the…
View article: ODE/IM Correspondence in Toda Field Theories and Fermionic Basis in sin(h)-Gordon Model
ODE/IM Correspondence in Toda Field Theories and Fermionic Basis in sin(h)-Gordon Model Open
The first part of this work consists of a study of the ODE/IM correspondence for simply-laced affine Toda field theories. It is a first step towards a full generalisation of the results of Lukyanov and Zamolodchikov on $\hat{\mathfrak a}_1…
View article: ODE/IM Correspondence in Toda Field Theories and Fermionic Basis in\n sin(h)-Gordon Model
ODE/IM Correspondence in Toda Field Theories and Fermionic Basis in\n sin(h)-Gordon Model Open
The first part of this work consists of a study of the ODE/IM correspondence\nfor simply-laced affine Toda field theories. It is a first step towards a full\ngeneralisation of the results of Lukyanov and Zamolodchikov on $\\hat{\\mathfrak\…
View article: T T ¯ $$ \mathrm{T}\overline{\mathrm{T}} $$ -deformed 2D quantum field theories
T T ¯ $$ \mathrm{T}\overline{\mathrm{T}} $$ -deformed 2D quantum field theories Open
It was noticed many years ago, in the framework of massless RG flows, that the irrelevant composite operator T¯T, built with the components of the energy-momentum tensor, enjoys very special properties in 2D quantum field theories, and can b…
View article: Integrable structures in quantum field theory
Integrable structures in quantum field theory Open
This review was born as notes for a lecture given at the YRIS school on integrability in Durham, in the summer of 2015. It deals with a beautiful method, developed in the mid-nineties by V.V. Bazhanov, S.L. Lukyanov and A.B. Zamolodchikov …