Ferdowsi University of Mashhad

output

20002026

most citedHealthFog: An Ensemble Deep Learning based Smart Healthcare System for Automatic Diagnosis of Heart Diseases in Integrated IoT and Fog Computing Environments

668 citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing hep-thShow all

131 papers · 1 filter

hep-th2025★ 1 cited

Scaling Symmetry and Carrollian Gravity

Hamid Afshar, Mehdi Ahmadi-Jahmani

We formulate matter-coupled scaling-Carroll gravity as a gauge theory and develop a conformal construction for generating local Carroll-invariant couplings. The construction relaxe…

hep-th2025★ 4 cited

Fracton and Non-Lorentzian Particle Duality: Gauge Field Couplings and Geometric Implications

M. M. Ahmadi-Jahmani, A. Parvizi

Fractons, characterized by restricted mobility and governed by higher-moment conservation laws, represent a novel phase of matter with deep connections to tensor gauge theories and…

hep-th2024★ 7 cited

Classification of Conformal Carroll Algebras

Hamid Afshar, Xavier Bekaert, Mojtaba Najafizadeh

We classify a one-parameter family, $confcarr_{z} (d + 1)$ , of conformal extensions of the Carroll algebra in arbitrary dimension with $z$ being the anisotropic scaling expon…

hep-th2024★ 3 cited

Six-Derivative Yang-Mills Couplings in Heterotic String Theory

Mohammad R. Garousi

In this work, we present a comprehensive analysis of the structure of six-derivative bosonic couplings in heterotic string theory. First, we determine the maximal covariant and Yan…

hep-th2024★ 4 cited

Carroll-Schrödinger Equation

Mojtaba Najafizadeh

The Poincaré symmetry can be contracted in two ways to yield the Galilei symmetry and the Carroll symmetry. The well-known Schrödinger equation exhibits the Galilei symmetry and is…

hep-th2023★ 19 cited

Super-Carrollian and Super-Galilean Field Theories

Konstantinos Koutrolikos, Mojtaba Najafizadeh

The exploration of scalar field theories that exhibit Carroll and Galilei symmetries has attracted a lot of attention. In this paper, we generalize these studies to fermionic field…

hep-th2023★ 3 cited

Holographic CFTs on $A d S_{d} \times S^{n}$ and conformal defects

Ahmad Ghodsi, Elias Kiritsis, Francesco Nitti

We consider ( $d + n + 1$ )-dimensional solutions of Einstein gravity with constant negative curvature. Regular solutions of this type are expected to be dual to the ground states of ($d…

hep-th2023★ 5 cited

The data on the boundary at order $α^{'}$

Mohammad R. Garousi

The least action principle indicates that for the open spacetime manifolds, there are data on the boundary. Recently, it has been proposed that the data for the effective actions a…

hep-th2022★ 2 cited

Massive to Massless by Applying a Nonlocal Field Redefinition

Mojtaba Najafizadeh

The invariance of physical observables like particle's mass under a local field redefinition is a well-known and important property of quantum field theory. In this paper, on the o…

hep-th2022★ 3 cited

Holography in CGHS supergravity

Hamid Afshar, Narges Aghamir

We study holographic aspects of 2D dilaton-supergravity in flat space-time using gauge theoretic BF formulation. The asymptotic symmetries in Bondi gauge and at finite temperature…

hep-th2022★ 8 cited

Higher-derivative couplings and torsional Riemann curvature

Mohammad R. Garousi

Using the most general higher-derivative field redefinition for the closed spacetime manifolds, we show that the tree-level couplings of the metric, $B$ -field and dilaton at orders…

hep-th2022★ 2 cited

T-duality of D-brane versus O-plane actions

Mohammad R. Hosseini, Mohammad R. Garousi

It is known that, in the static gauge, the world-volume and the transverse Kaluza-Klein (KK) reductions of the O-plane effective actions on a circle satisfy the T-duality constrain…

hep-th2022★ 11 cited

Holographic QFTs on AdS $_{d}$ , wormholes and holographic interfaces

A. Ghodsi, J. K. Ghosh, E. Kiritsis +2

We consider three related topics: (a) Holographic quantum field theories on AdS spaces. (b) Holographic interfaces of flat space QFTs. (c) Wormholes connecting generically differen…

hep-th2022★ 8 cited

Couplings of order six in the gauge field strength and the second fundamental form on a D $_{p}$ -brane at order $α^{'2}$

Mohammad R. Garousi, Saman Karimi

Using the assumption that the independent gauge invariant couplings on the world-volume of the non-perturbative objects in the string theory are independent of the background, we f…

hep-th2022★ 15 cited

Background independence of effective actions at critical dimension

Mohammad R. Garousi

Recently, by explicit calculations at orders $α^{'}, α^{'2}, α^{'3}$ , it has been observed that the effective action of string theory at the critical dimension is independent of the backgro…

hep-th2021★ 25 cited

Flat JT Gravity and the BMS-Schwarzian

Hamid Afshar, Blagoje Oblak

We consider Minkowskian Jackiw-Teitelboim (JT) gravity in Bondi gauge at finite temperature, with non-zero vacuum energy. Its asymptotic symmetries span an extension of the warped…

hep-th2021★ 11 cited

Higher-derivative field redefinitions in the presence of boundary

Mohammad R. Garousi

Recently it has been proposed that the consistency with T-duality requires the effective action of string theory at order $α^{' n}$ satisfies the least action principle provided that…

hep-th2021★ 9 cited

$O (25, 25)$ symmetry of bosonic string theory at order $α^{'2}$

Mohammad R. Garousi

It has been recently observed that the imposition of the $O (1, 1)$ symmetry on the circle reduction of the classical effective action of string theory, can fix the effective action…

hep-th2021★ 21 cited

Exotic Final States in the $φ^{8}$ Multi-Kink Collisions

Vakhid A. Gani, Aliakbar Moradi Marjaneh, Kurosh Javidan

We study final states in the scattering of kinks and antikinks of the $φ^{8}$ field-theoretic model. We use the initial conditions in the form of two, three or four static or moving…

hep-th2021★ 3 cited

Higher order curvature corrections and holographic renormalization group flow

Ahmad Ghodsi, Malihe Siahvoshan

We study the holographic renormalization group (RG) flow in the presence of higher-order curvature corrections to the $(d + 1)$ -dimensional Einstein-Hilbert (EH) action for an arbitr…

hep-th2021★ 13 cited

$O (9, 9)$ symmetry of NS-NS couplings at order $α^{'3}$

Mohammad R. Garousi

Recently, imposing the $O (1, 1)$ symmetry on the circle reduction of the classical effective action of string theory, we have found all NS-NS couplings of type II superstring theori…

hep-th2021★ 9 cited

Effective action of string theory at order $α^{'}$ in the presence of boundary

Mohammad R. Garousi

Recently, using the assumption that the string theory effective action at the critical dimension is background independent, the classical on-shell effective action of the bosonic s…

hep-th2021★ 1 cited

Minimal gauge invariant couplings at order $ℓ_{p}^{6}$ in M-theory

Mohammad R. Garousi

Removing the field redefinitions, the Bianchi identities and the total derivative freedoms from the general form of the gauge invariant couplings at order $ℓ_{p}^{6}$ for the bosoni…

hep-th2020★ 9 cited

Flat space holography in spin-2 extended dilaton-gravity

Hamid Afshar, Erfan Esmaeili, Hamid Safari

We present an interacting spin-2 gauge theory coupled to the two-dimensional dilaton-gravity in flat spacetime. The asymptotic symmetry group is enhanced to the central extension o…

Scaling Symmetry and Carrollian Gravity

Fracton and Non-Lorentzian Particle Duality: Gauge Field Couplings and Geometric Implications

Classification of Conformal Carroll Algebras

Six-Derivative Yang-Mills Couplings in Heterotic String Theory

Carroll-Schrödinger Equation

Super-Carrollian and Super-Galilean Field Theories

Holographic CFTs on AdSd​×Sn and conformal defects

The data on the boundary at order α′

Massive to Massless by Applying a Nonlocal Field Redefinition

Holography in CGHS supergravity

Higher-derivative couplings and torsional Riemann curvature

T-duality of D-brane versus O-plane actions

Holographic QFTs on AdSd​, wormholes and holographic interfaces

Couplings of order six in the gauge field strength and the second fundamental form on a Dp​-brane at order α′2

Background independence of effective actions at critical dimension

Flat JT Gravity and the BMS-Schwarzian

Higher-derivative field redefinitions in the presence of boundary

O(25,25) symmetry of bosonic string theory at order α′2

Exotic Final States in the φ8 Multi-Kink Collisions

Higher order curvature corrections and holographic renormalization group flow

O(9,9) symmetry of NS-NS couplings at order α′3

Effective action of string theory at order α′ in the presence of boundary

Minimal gauge invariant couplings at order ℓp6​ in M-theory

Flat space holography in spin-2 extended dilaton-gravity

Holographic CFTs on $A d S_{d} \times S^{n}$ and conformal defects

The data on the boundary at order $α^{'}$

Holographic QFTs on AdS $_{d}$ , wormholes and holographic interfaces

Couplings of order six in the gauge field strength and the second fundamental form on a D $_{p}$ -brane at order $α^{'2}$

$O (25, 25)$ symmetry of bosonic string theory at order $α^{'2}$

Exotic Final States in the $φ^{8}$ Multi-Kink Collisions

$O (9, 9)$ symmetry of NS-NS couplings at order $α^{'3}$

Effective action of string theory at order $α^{'}$ in the presence of boundary

Minimal gauge invariant couplings at order $ℓ_{p}^{6}$ in M-theory