273 citations · 1.2k across the 29 of their papers we have counts for
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Holographic CCFT Pseudo-Entropy
Reza Fareghbal, Abolfazl Hassani Majoulan
According to the flat/CCFT correspondence, Carrollian conformal field theories (CCFT) in d dimensions are dual to asymptotically flat spacetimes in d+1 dimensions. In this paper, s…
Flat-Space Limit of Holographic Pseudo Entropy in (A)dS Spacetimes
Reza Fareghbal
The real part of pseudo entropy in conformal field theories is holographically calculated by the area of some extremal spacelike surfaces in the dual dS and AdS spacetimes. We show…
Dominant Spacetime in Three Dimensional de Sitter Gravity
Reza Fareghbal, Vahid Reza Shajiee
In three dimensions, Kerr-de Sitter spacetime as a solution of Einstein gravity with positive cosmological constant has a single cosmological horizon. The flat-space limit (zero co…
Islands in Kerr-de Sitter spacetime and their flat limit
Sanam Azarnia, Reza Fareghbal
We use quantum extremal island method to study the information paradox on certain cosmological setups known as three dimensional Kerr-de Sitter spacetimes. To do so, we couple an a…
Islands in Flat-Space Cosmology
Sanam Azarnia, Reza Fareghbal, Ali Naseh +1
Flat-space cosmologies (FSC) are solutions to three dimensional theories of gravity without cosmological constant that have cosmological horizons. A detector located near the time-…
Flat-space Limit of Extremal Curves
Reza Fareghbal, Mehdi Hakami Shalamzari, Pedram Karimi
According to the Ryu-Takayanagi prescription, the entanglement entropy of subsystems in the boundary conformal field theory (CFT) is proportional to the area of extremal surfaces i…
First Law of Entanglement Entropy in Flat-Space Holography
Reza Fareghbal, Mehdi Hakami Shalamzari
According to flat/Bondi-Metzner-Sachs invariant field theories (BMSFT) correspondence, asymptotically flat spacetimes in -dimensions are dual to -dimensional BMSFTs. In t…
Complexity Growth in Flat Spacetimes
Reza Fareghbal, Pedram Karimi
We use the complexity equals action proposal to calculate the rate of complexity growth for field theories that are the holographic duals of asymptotically flat spacetimes. To this…
Holographic Calculation of BMSFT Mutual and 3-partite Information
Mohammad Asadi, Reza Fareghbal
We use flat-space holography to calculate the mutual information and the 3-partite information of a two-dimensional BMS-invariant field theory (BMSFT). This theory is the putat…
Flat-space Holography and Correlators of Robinson-Trautman Stress tensor
Reza Fareghbal, Isa Mohammadi
We propose a quasi-local stress tensor for the four-dimensional asymptotically flat Robinson-Trautman geometries by taking the flat-space limit from the corresponding asymptoticall…
Logarithmic Correction to BMSFT Entanglement Entropy
Reza Fareghbal, Pedram Karimi
Using Rindler method we derive the logarithmic correction to the entanglement entropy of a two dimensional BMS-invariant field theory (BMSFT). In particular, we present a general f…
Stress Tensor Correlators of CCFT using Flat-Space Holography
Mohammad Asadi, Omid Baghchesaraei, Reza Fareghbal
We use the correspondence between three-dimensional asymptotically flat spacetimes and two-dimensional contracted conformal field theories (CCFTs) to derive the stress tensor corre…
Flat-Space Holography and Stress Tensor of Kerr Black Hole
Omid Baghchesaraei, Reza Fareghbal, Yousef Izadi
We propose a stress tensor for the Kerr black hole written in the Boyer-Lindquist coordinate. To achieve this, we use the dictionary of the Flat/CCFT correspondence and take the fl…
Aspects of Ultra-Relativistic Field Theories via Flat-space Holography
Reza Fareghbal, Ali Naseh, Shahin Rouhani
Recently it was proposed that asymptotically flat spacetimes have a holographic dual which is an ultra-relativistic conformal field theory. In this paper, we obtain the conformal a…
Holography of 3D Asymptotically Flat Black Holes
Reza Fareghbal, Seyed Morteza Hosseini
We study the asymptotically flat rotating hairy black hole solution of a three-dimensional gravity theory which is given by taking the flat-space limit (zero cosmological constant…
Aspects of Flat/CCFT Correspondence
Reza Fareghbal, Ali Naseh
Flat/CCFT is a correspondence between gravity in asymptotically flat backgrounds and a field theory which is given by contraction of conformal field theory. In order to find a dict…
Rindler/Contracted-CFT Correspondence
Reza Fareghbal, Ali Naseh
Taking the flat-space limit (zero cosmological constant limit) of the Rindler-AdS spacetime yields the Rindler metric. According to the proposal of Flat/contracted-CFT corresponden…
Flat-Space Energy-Momentum Tensor from BMS/GCA Correspondence
Reza Fareghbal, Ali Naseh
Flat-space limit is well-defined for asymptotically AdS spacetimes written in coordinates called the BMS gauge. For the three-dimensional Einstein gravity with a negative cosmologi…
Higher spin theory in 3-dimensional flat space
Hamid Afshar, Arjun Bagchi, Reza Fareghbal +2
We present the first example of a non-trivial higher spin theory in 3-dimensional flat space. We propose flat-space boundary conditions and prove their consistency for this theory.…
Holography of 3d Flat Cosmological Horizons
Arjun Bagchi, Stephane Detournay, Reza Fareghbal +1
We provide a first derivation of the Bekenstein-Hawking entropy of 3d flat cosmological horizons in terms of the counting of states in a dual field theory. These horizons appear in…
BMS/GCA Redux: Towards Flatspace Holography from Non-Relativistic Symmetries
Arjun Bagchi, Reza Fareghbal
The asymptotic group of symmetries at null infinity of flat spacetimes in three and four dimensions is the infinite dimensional Bondi-Metzner-Sachs (BMS) group. This has recently b…
Boundary CFT from Holography
Mohsen Alishahiha, Reza Fareghbal
We explore some aspects of holographic dual of Boundary Conformal Field Theory (BCFT). In particular we study asymptotic symmetry of geometries which provide holographic dual of BC…
D-Dimensional Log Gravity
Mohsen Alishahiha, Reza Fareghbal
We study Einstein gravity in dimensions modified by curvature squared at critical point where the theory contains only massless gravitons. We show that at the critical po…
Hidden Conformal Symmetry of Warped AdS_3 Black Holes
Reza Fareghbal
We show that for a certain low frequency limit the wave equation of a generic massive scalar field in the background of the spacelike warped AdS_3 black hole can be written as the…