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26 papers · 2 filters
Gravitational collapse in SYK models and Choptuik-like phenomenon
Avinash Dhar, Adwait Gaikwad, Lata Kh Joshi +2
SYK model is a quantum mechanical model of fermions which is solvable at strong coupling and plays an important role as perhaps the simplest holographic model of quantum gravity an…
Maximal Chaos from Strings, Branes and Schwarzian Action
Avik Banerjee, Arnab Kundu, Rohan Poojary
In this article, we explicitly demonstrate that, for a sufficiently generic class of examples, an open string embedded in an AdS-background yields an effective Schwarzian action an…
Entanglement Entropy, Relative Entropy and Duality
Upamanyu Moitra, Ronak M Soni, Sandip P. Trivedi
A definition for the entanglement entropy in both Abelian and non-Abelian gauge theories has been given in the literature, based on an extended Hilbert space construction. The resu…
Stokes Polytopes : The positive geometry for interactions
Pinaki Banerjee, Alok Laddha, Prashanth Raman
In a remarkable recent work [arXiv : 1711.09102] by Arkani-Hamed et al, the amplituhedron program was extended to the realm of non-supersymmetric scattering amplitudes. In particul…
Spectral Representation of Thermal OTO Correlators
Soumyadeep Chaudhuri, Chandramouli Chowdhury, R. Loganayagam
We study the spectral representation of finite temperature, out of time ordered (OTO) correlators on the multi-time-fold generalised Schwinger-Keldysh contour. We write the contour…
The full space of BPS multicenter states with pure D-brane charges
Pierre Heidmann, Swapnamay Mondal
We investigate the space of BPS states in type IIA string theory on a T wrapped by one D6 brane and three D2 branes wrapping three disjoint 2-tori. This system of branes has 12…
Bounds on Slow Roll at the Boundary of the Landscape
Sumit K. Garg, Chethan Krishnan, M. Zaid Zaz
We present strong evidence that the tree level slow roll bounds of arXiv:1807.05193 and arXiv:1810.05506 are valid, even when the tachyon has overlap with the volume of the cycle w…
Aspects of Hecke Symmetry: Anomalies, Curves, and Chazy Equations
Sujay K. Ashok, Dileep P. Jatkar, Madhusudhan Raman
We study various relations governing quasi-automorphic forms associated to discrete subgroups of called Hecke groups. We show that the Eisenstein series a…
Scalar Asymptotic Charges and Dual Large Gauge Transformations
Miguel Campiglia, Laurent Freidel, Florian Hopfmüller +1
In recent years soft factorization theorems in scattering amplitudes have been reinterpreted as conservation laws of asymptotic charges. In gauge, gravity, and higher spin theories…
Strings, Branes, Schwarzian Action and Maximal Chaos
Avik Banerjee, Arnab Kundu, Rohan R. Poojary
In this article, we present explicit evidence that maximal chaos occurs for a generic, probe quark-like defect degrees of freedom, in a strongly coupled large gauge theory. I…
A Toy Model of the Information Paradox in Empty Space
Suvrat Raju
A sharp version of the information paradox involves a seeming violation of the monogamy of entanglement during black hole evaporation. We construct an analogous paradox in empty an…
On Rigidity of 3d Asymptotic Symmetry Algebras
A. Farahmand Parsa, H. R. Safari, M. M. Sheikh-Jabbari
We study rigidity and stability of infinite dimensional algebras which are not subject to the Hochschild-Serre factorization theorem. In particular, we consider algebras appearing…
A comment on effective field theories of flux vacua
Shamit Kachru, Sandip Trivedi
We discuss some basic aspects of effective field theory applied to supergravity theories which arise in the low-energy limit of string theory. Our discussion is particularly releva…
Flows, Fixed Points and Duality in Chern-Simons-matter theories
Ofer Aharony, Sachin Jain, Shiraz Minwalla
It has been conjectured that 3d fermions minimally coupled to Chern-Simons gauge fields are dual to 3d critical scalars, also minimally coupled to Chern-Simons gauge fields. The la…
Extremal and Near-Extremal Black Holes and Near-
Upamanyu Moitra, Sandip P. Trivedi, V. Vishal
We study the behaviour of extremal and near-extremal black holes at low energies and low temperatures and find that it can be understood from the near-horizon region. Our a…
Duality and an exact Landau-Ginzburg potential for quasi-bosonic Chern-Simons-Matter theories
Anshuman Dey, Indranil Halder, Sachin Jain +3
It has been conjectured that Chern-Simons (CS) gauged `regular' bosons in the fundamental representation are `level-rank' dual to CS gauged critical fermions also in the fundamenta…
Probing Out-of-Time-Order Correlators
Soumyadeep Chaudhuri, R. Loganayagam
We present a method to probe the Out-of-Time-Order Correlators (OTOCs) of a general system by coupling it to a harmonic oscillator probe. When the system's degrees of freedom are t…
Large D gravity and charged membrane dynamics with nonzero cosmological constant
Suman Kundu, Poulami Nandi
In this paper, we have found a class of dynamical charged 'black-hole' solutions to Einstein-Maxwell system with a non-zero cosmological constant in a large number of spacetime dim…
The large D Membrane Paradigm For Einstein-Gauss-Bonnet Gravity
Arunabha Saha
We find the equations of motion of membranes dual to the black holes in Einstein-Gauss-Bonnet (EGB) gravity to leading order in 1/D in the large D regime. We also find the metric s…
Black holes in presence of cosmological constant: Second order in 1/D
Sayantani Bhattacharyya, Parthajit Biswas, Yogesh Dandekar
We have extended the results of arXiv:1704.06076 upto second subleading order in an expansion around large dimension D. Unlike the previous case, there are non-trivial metric corre…
A Critique of the Fuzzball Program
Suvrat Raju, Pushkal Shrivastava
We explore the viability of fuzzballs as candidate microstate geometries for the black hole, and their possible role in resolutions of the information paradox. We argue that if fuz…
Bose-Fermi Chern-Simons Dualities in the Higgsed Phase
Sayantan Choudhury, Anshuman Dey, Indranil Halder +4
It has been conjectured that fermions minimally coupled to a Chern-Simons gauge field define a conformal field theory (CFT) that is level-rank dual to Chern-Simons gauged Wilson-Fi…
Effective Action for Relativistic Hydrodynamics: Fluctuations, Dissipation, and Entropy Inflow
Felix M. Haehl, R. Loganayagam, Mukund Rangamani
We present a detailed and self-contained analysis of the universal Schwinger-Keldysh effective field theory which describes macroscopic thermal fluctuations of a relativistic field…
Complex Langevin Dynamics in Large Unitary Matrix Models
Pallab Basu, Kasi Jaswin, Anosh Joseph
Using complex Langevin dynamics we examine the phase structure of complex unitary matrix models and compare the numerical results with analytic results found at large . The acti…