Kiarash Naderi
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Kiarash Naderi has a total of 6 co-authors. Here are the top co-authors by number of shared publications:
- Andrea Dei
University of Chicago
5 shared publications - Matthias R. Gaberdiel
Institut für Theoretische Physik, ETH Zürich
4 shared publications - Bob Knighton
University of Cambridge
3 shared publications - Vit Sriprachyakul
Institut für Theoretische Physik, ETH Zürich
3 shared publications - Marc-Antoine Fiset
Institut für Theoretische Physik, ETH Zürich, Zürich, Switzerland
2 shared publications - Savdeep Sethi
University of Chicago
2 shared publications
Latest Publications
- Open Access
- 22 October 2026
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2026 (10) , 224
$ T\overline{T} $ correlators from tensionless stringsA bstract: Motivated by earlier approaches, we develop a worldsheet framework for computing correlation functions in the single trace $$ T\overline{T} $$ -deformed tensionless AdS 3 /CFT 2 duality. By describing the deformed bulk theory as a Berkovits-Vafa $$ \mathcal{N} $$ = 4 topological string, we obtain a consistent definition of physical states and correlation functions, yielding a tractable setup for testing aspects of holography beyond AdS/CFT. We construct deformed physical vertex operators and compute their tree-level two-point functions exactly. We discuss the relation of our results to previous proposals for $$ T\overline{T} $$ -deformed two-point functions obtained from alternative worldsheet approaches, JT gravity, and perturbative field theory computations.- 22 October 2026
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2026 (10) , 224
Open Access$ T\overline{T} $ correlators from tensionless stringsA bstract: Motivated by earlier approaches, we develop a worldsheet framework for computing correlation functions in the single trace $$ T\overline{T} $$ -deformed tensionless AdS 3 /CFT 2 duality. By describing the deformed bulk theory as a Berkovits-Vafa $$ \mathcal{N} $$ = 4 topological string, we obtain a consistent definition of physical states and correlation functions, yielding a tractable setup for testing aspects of holography beyond AdS/CFT. We construct deformed physical vertex operators and compute their tree-level two-point functions exactly. We discuss the relation of our results to previous proposals for $$ T\overline{T} $$ -deformed two-point functions obtained from alternative worldsheet approaches, JT gravity, and perturbative field theory computations. - Open Access
- 15 September 2026
- Published by Elsevier in Nuclear Physics B
- Vol. 1031
The on-shell gravity action and linear dilaton holography
- 15 September 2026
- Published by Elsevier in Nuclear Physics B
- Vol. 1031
Open AccessThe on-shell gravity action and linear dilaton holography
- Open Access
- 18 March 2025
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2025 (3) , 1-43
Space-time symmetry from the world-sheet
The tensionless string on AdS3 is a laboratory to study different aspects of the AdS/CFT correspondence. A particular question addressed in this paper is how the space-time symmetry algebra is encoded on the world-sheet. A natural prescription for calculating the space-time OPEs from the world-sheet is presented in the hybrid formalism. An argument showing that the OPEs are correctly reproduced from the world-sheet is provided, together with a few explicit calculations as consistency checks.
- 18 March 2025
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2025 (3) , 1-43
Open AccessSpace-time symmetry from the world-sheet
The tensionless string on AdS3 is a laboratory to study different aspects of the AdS/CFT correspondence. A particular question addressed in this paper is how the space-time symmetry algebra is encoded on the world-sheet. A natural prescription for calculating the space-time OPEs from the world-sheet is presented in the hybrid formalism. An argument showing that the OPEs are correctly reproduced from the world-sheet is provided, together with a few explicit calculations as consistency checks.
- Open Access
- 26 November 2024
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2024 (11) , 1-44
Tensionless AdS3/CFT2 and single trace $ T\overline{T} $One of the few cases of AdS/CFT where both sides of the duality are under good control relates tensionless k = 1 strings on AdS3 to a two-dimensional symmetric product CFT. Building on prior observations, we propose an exact duality between string theory on a spacetime which is not asymptotically AdS and a non-conformal field theory. The bulk theory is constructed as a marginal deformation of the k = 1 AdS3 string while the spacetime dual is a single trace $$ T\overline{T} $$ -deformed symmetric orbifold theory. As evidence for the duality, we match the one-loop bulk and boundary torus partition functions. This correspondence provides a framework to both learn about quantum gravity beyond AdS and understand how to define physical observables in $$ T\overline{T} $$ -deformed field theories.- 26 November 2024
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2024 (11) , 1-44
Open AccessTensionless AdS3/CFT2 and single trace $ T\overline{T} $One of the few cases of AdS/CFT where both sides of the duality are under good control relates tensionless k = 1 strings on AdS3 to a two-dimensional symmetric product CFT. Building on prior observations, we propose an exact duality between string theory on a spacetime which is not asymptotically AdS and a non-conformal field theory. The bulk theory is constructed as a marginal deformation of the k = 1 AdS3 string while the spacetime dual is a single trace $$ T\overline{T} $$ -deformed symmetric orbifold theory. As evidence for the duality, we match the one-loop bulk and boundary torus partition functions. This correspondence provides a framework to both learn about quantum gravity beyond AdS and understand how to define physical observables in $$ T\overline{T} $$ -deformed field theories. - Open Access
- 19 September 2024
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2024 (9) , 1-63
Solving AdS3 string theory at minimal tension: tree-level correlators
We revisit the minimal tension (k = 1) string theory on AdS3 × S3 × 𝕋4. We propose a new free-field description of the worldsheet theory and show how localization of string amplitudes emerges from the path integral. We exemplify our proposal by reproducing the worldsheet partition function of the $$ \mathfrak{psu} $$ (1, 1|2)1 WZW model and providing explicit expressions for spectrally-flowed vertex operators and DDF operators. We compute string correlators in the path integral formalism and obtain a precise tree-level match with correlation functions of the boundary symmetric orbifold.- 19 September 2024
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2024 (9) , 1-63
Open AccessSolving AdS3 string theory at minimal tension: tree-level correlators
We revisit the minimal tension (k = 1) string theory on AdS3 × S3 × 𝕋4. We propose a new free-field description of the worldsheet theory and show how localization of string amplitudes emerges from the path integral. We exemplify our proposal by reproducing the worldsheet partition function of the $$ \mathfrak{psu} $$ (1, 1|2)1 WZW model and providing explicit expressions for spectrally-flowed vertex operators and DDF operators. We compute string correlators in the path integral formalism and obtain a precise tree-level match with correlation functions of the boundary symmetric orbifold. - Open Access
Space-time symmetry from the world-sheet
The tensionless string on AdS$_3$ is a laboratory to study different aspects of the AdS/CFT correspondence. A particular question addressed in this paper is how the space-time symmetry algebra is encoded on the world-sheet. A natural prescription for calculating the space-time OPEs from the world-sheet is presented in the hybrid formalism. An argument showing that the OPEs are correctly reproduced from the world-sheet is provided, together with a few explicit calculations as consistency checks.
Open AccessSpace-time symmetry from the world-sheet
The tensionless string on AdS$_3$ is a laboratory to study different aspects of the AdS/CFT correspondence. A particular question addressed in this paper is how the space-time symmetry algebra is encoded on the world-sheet. A natural prescription for calculating the space-time OPEs from the world-sheet is presented in the hybrid formalism. An argument showing that the OPEs are correctly reproduced from the world-sheet is provided, together with a few explicit calculations as consistency checks.
- Open Access
Solving AdS$_3$ string theory at minimal tension: tree-level correlators
We revisit the minimal tension ($k=1$) string theory on $\text{AdS}_3\times\text{S}^3\times\mathbb{T}^4$. We propose a new free-field description of the worldsheet theory and show how localization of string amplitudes emerges from the path integral. We exemplify our proposal by reproducing the worldsheet partition function of the $\mathfrak{psu}(1,1|2)_1$ WZW model and providing explicit expressions for spectrally-flowed vertex operators and DDF operators. We compute string correlators in the path integral formalism and obtain a precise tree-level match with correlation functions of the boundary symmetric orbifold.Open AccessSolving AdS$_3$ string theory at minimal tension: tree-level correlators
We revisit the minimal tension ($k=1$) string theory on $\text{AdS}_3\times\text{S}^3\times\mathbb{T}^4$. We propose a new free-field description of the worldsheet theory and show how localization of string amplitudes emerges from the path integral. We exemplify our proposal by reproducing the worldsheet partition function of the $\mathfrak{psu}(1,1|2)_1$ WZW model and providing explicit expressions for spectrally-flowed vertex operators and DDF operators. We compute string correlators in the path integral formalism and obtain a precise tree-level match with correlation functions of the boundary symmetric orbifold. - Open Access
- 12 July 2023
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2023 (7) , 1-31
Perturbing the symmetric orbifold from the worldsheet
The symmetric orbifold of 𝕋4 is the analogue of free SYM in four dimensions, and its dual is described by a tensionless string propagating in AdS3 × S3 × 𝕋4. In this paper we study the deformation of this exact AdS/CFT duality away from the free point. On the symmetric orbifold side this amounts to perturbing the theory by the exactly marginal operator from the 2-cycle twisted sector. We identify the corresponding perturbation in the dual worldsheet description, and show that the anomalous conformal dimensions of a number of symmetric orbifold currents are correctly reproduced from this worldsheet perspective.
- 12 July 2023
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2023 (7) , 1-31
Open AccessPerturbing the symmetric orbifold from the worldsheet
The symmetric orbifold of 𝕋4 is the analogue of free SYM in four dimensions, and its dual is described by a tensionless string propagating in AdS3 × S3 × 𝕋4. In this paper we study the deformation of this exact AdS/CFT duality away from the free point. On the symmetric orbifold side this amounts to perturbing the theory by the exactly marginal operator from the 2-cycle twisted sector. We identify the corresponding perturbation in the dual worldsheet description, and show that the anomalous conformal dimensions of a number of symmetric orbifold currents are correctly reproduced from this worldsheet perspective.
- Open Access
Perturbing the symmetric orbifold from the worldsheet
The symmetric orbifold of $\mathbb{T}^4$ is the analogue of free SYM in four dimensions, and its dual is described by a tensionless string propagating in ${\rm AdS}_3\times {\rm S}^3 \times \mathbb{T}^4$. In this paper we study the deformation of this exact AdS/CFT duality away from the free point. On the symmetric orbifold side this amounts to perturbing the theory by the exactly marginal operator from the $2$-cycle twisted sector. We identify the corresponding perturbation in the dual worldsheet description, and show that the anomalous conformal dimensions of a number of symmetric orbifold currents are correctly reproduced from this worldsheet perspective.Open AccessPerturbing the symmetric orbifold from the worldsheet
The symmetric orbifold of $\mathbb{T}^4$ is the analogue of free SYM in four dimensions, and its dual is described by a tensionless string propagating in ${\rm AdS}_3\times {\rm S}^3 \times \mathbb{T}^4$. In this paper we study the deformation of this exact AdS/CFT duality away from the free point. On the symmetric orbifold side this amounts to perturbing the theory by the exactly marginal operator from the $2$-cycle twisted sector. We identify the corresponding perturbation in the dual worldsheet description, and show that the anomalous conformal dimensions of a number of symmetric orbifold currents are correctly reproduced from this worldsheet perspective. - Open Access
- 9 December 2022
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2022 (12) , 1-33
DDF operators in the hybrid formalism
String theory with one unit of NS-NS flux on AdS3 × S3 × 𝕋4 has been recently realised to be the exact dual of the symmetric orbifold of 𝕋4. In the hybrid formalism of Berkovits, Vafa and Witten and using the free-field realisation of $$ \mathfrak{psu} $$ (1, 1|2)1, the DDF operators of the free bosons and the free fermions of 𝕋4 are constructed. It is shown that these DDF operators reproduce the whole spectrum of the space-time theory on the world-sheet and therefore provide a derivation of the dual spectrum from first-principles.- 9 December 2022
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2022 (12) , 1-33
Open AccessDDF operators in the hybrid formalism
String theory with one unit of NS-NS flux on AdS3 × S3 × 𝕋4 has been recently realised to be the exact dual of the symmetric orbifold of 𝕋4. In the hybrid formalism of Berkovits, Vafa and Witten and using the free-field realisation of $$ \mathfrak{psu} $$ (1, 1|2)1, the DDF operators of the free bosons and the free fermions of 𝕋4 are constructed. It is shown that these DDF operators reproduce the whole spectrum of the space-time theory on the world-sheet and therefore provide a derivation of the dual spectrum from first-principles.