#4658 Overall Influence

Indian physicist

Abhay Vasant Ashtekar is an Indian theoretical physicist. He is the Eberly Professor of Physics and the Director of the Institute for Gravitational Physics and Geometry at Pennsylvania State University. As the creator of Ashtekar variables, he is one of the founders of loop quantum gravity and its subfield loop quantum cosmology. He has also written a number of descriptions of loop quantum gravity that are accessible to non-physicists. In 1999, Ashtekar and his colleagues were able to calculate the entropy for a black hole, matching a legendary 1974 prediction by Hawking. Oxford mathematical physicist Roger Penrose has described Ashtekar's approach to quantum gravity as "The most important of all the attempts at 'quantizing' general relativity." Ashtekar was elected as Member to National Academy of Sciences in May 2016.

Source: Wikipedia- Background independent quantum gravity: a status report
- New Variables for Classical and Quantum Gravity
- New Hamiltonian formulation of general relativity
- Quantum nature of the big bang: Improved dynamics
- Loop quantum cosmology: a status report
- Quantum theory of geometry: I. Area operators
- Mathematical structure of loop quantum cosmology
- Quantum Nature of the Big Bang
- Isolated and Dynamical Horizons and Their Applications
- Quantization of diffeomorphism invariant theories of connections with local degrees of freedom
- Quantum nature of the big bang: An analytical and numerical investigation
- Lectures on Non-Perturbative Canonical Gravity
- Quantum geometry of isolated horizons and black hole entropy
- Quantum theory of geometry II: Volume operators
- Robustness of key features of loop quantum cosmology
- A unified treatment of null and spatial infinity in general relativity. I. Universal structure, asymptotic symmetries, and conserved quantities at spatial infinity
- Loop quantum cosmology ofk=1FRW models
- Weaving a classical metric with quantum threads
- Asymptotically anti-de Sitter spacetimes: conserved quantities
- Dynamical horizons and their properties
- Isolated horizons: Hamiltonian evolution and the first law
- Projective techniques and functional integration for gauge theories
- Loop quantum cosmology of Bianchi type I models
- Differential geometry on the space of connections via graphs and projective limits
- Dynamical Horizons: Energy, Angular Momentum, Fluxes, and Balance Laws
- Generic Isolated Horizons and Their Applications
- Quantum gravity, shadow states and quantum mechanics
- Quantum geometry and the Schwarzschild singularity
- Mechanics of rotating isolated horizons
- Black hole evaporation: a paradigm
- Mechanics of isolated horizons
- The pre-inflationary dynamics of loop quantum cosmology: confronting quantum gravity with observations
- Isolated horizons: a generalization of black hole mechanics
- Quantum Gravity Extension of the Inflationary Scenario
- Loop quantum cosmology: an overview
- Geometry of generic isolated horizons
- Extension of the quantum theory of cosmological perturbations to the Planck era
- Asymptotic structure of symmetry-reduced general relativity
- Isolated horizons: The classical phase space
- New variables for gravity: Inclusion of matter
- Multipole moments of isolated horizons
- Loop quantum cosmology of Bianchi type II models
- THE CP PROBLEM IN QUANTUM GRAVITY
- Probability of inflation in loop quantum cosmology
- Quantum theory of geometry: III. Non-commutativity of Riemannian structures
- Loop quantum cosmology and slow roll inflation
- Loops, Knots, Gauge Theories and Quantum Gravity
- Some uniqueness results for dynamical horizons
- Polymer and Fock representations for a scalar field
- Quantum field theory on a cosmological, quantum space-time
- Gravity and the quantum
- A new characterization of half-flat solutions to Einstein's equation
- Asymptotic Quantization of the Gravitational Field
- An algebraic extension of Dirac quantization: Examples
- Asymptotics with a positive cosmological constant: I. Basic framework
- Positive cosmological constant in loop quantum cosmology
- Quantum Transfiguration of Kruskal Black Holes
- Information is Not Lost in the Evaporation of 2D Black Holes
- Casting loop quantum cosmology in the spin foam paradigm
- Quantum extension of the Kruskal spacetime
- The Astrophysical Multimessenger Observatory Network (AMON)
- Radiative degrees of freedom of the gravitational field in exact general relativity
- Large Quantum Gravity Effects: Unforeseen Limitations of the Classical Theory
- Striking property of the gravitational Hamiltonian
- The Sagnac effect in general relativity
- Gravitons and loops
- On the canonical approach to quantum gravity
- Loop quantum cosmology and spin foams
- Asymptotics with a positive cosmological constant. II. Linear fields on de Sitter spacetime
- Coherent State Transforms for Spaces of Connections
- Loop quantum cosmology: from pre-inflationary dynamics to observations
- MINISUPERSPACES: OBSERVABLES AND QUANTIZATION
- On conserved quantities in general relativity
- Relation between polymer and Fock excitations
- Non-minimally coupled scalar fields and isolated horizons
- Energy-Momentum in General Relativity
- Path integrals and the WKB approximation in loop quantum cosmology
- Singularity resolution in loop quantum cosmology: A brief overview
- On the existence of solutions to Einstein's equation with non-zero Bondi news
- Quantum horizons and black-hole entropy: inclusion of distortion and rotation
- Geometrical Formulation of Quantum Mechanics
- Isolated horizons in $2 + 1$ gravity
- Hairy black holes, horizon mass and solitons
- Gravitational Waves from Isolated Systems: Surprising Consequences of a Positive Cosmological Constant
- Behavior of Einstein-Rosen waves at null infinity
- Asymptotics with a positive cosmological constant. III. The quadrupole formula
- Asymptotics and Hamiltonians in a first-order formalism
- Null infinity, the BMS group and infrared issues
- THE COVARIANT PHASE SPACE OF ASYMPTOTICALLY FLAT GRAVITATIONAL FIELDS
- Non-minimal couplings, quantum geometry and black-hole entropy
- Surprises in the Evaporation of 2D Black Holes
- Laws governing isolated horizons: inclusion of dilaton couplings
- Quantum gravity in the sky: interplay between fundamental theory and observations
- Preferred instantaneous vacuum for linear scalar fields in cosmological space-times
- NUT 4‐momenta are forever
- Semiclassical states for constrained systems
- Hamiltonian formulation of the Belinskii-Khalatnikov-Lifshitz conjecture
- On the symplectic structure of general relativity
- Evaporation of two-dimensional black holes
- From i ° to the 3+1 description of spatial infinity
- Chern-Simons and palatini actions and (2+1)-gravity
- Generalized Wick transform for gravity
- Covariant entropy bound and loop quantum cosmology
- A curiosity concerning the role of coherent states in quantum field theory
- Gravity, Geometry and the Quantum
- On the relation between classical and quantum observables
- A geometrical approach to external potential problems in quantum field theory
- Isometries compatible with asymptotic flatness at null infinity: A complete description
- Energy-momentum of isolated systems cannot be null
- Generalized effective description of loop quantum cosmology
- On the uniqueness of kinematics of loop quantum cosmology
- BRST structure of general relativity in terms of new variables
- Phase space of general relativity revisited: A canonical choice of time and simplification of the Hamiltonian
- Phenomenology with fluctuating quantum geometries in loop quantum cosmology
- Geometry of quantum mechanics
- Logarithmic ambiguities in the description of spatial infinity
- Linkages and Hamiltonians at null infinity
- Inequivalent observable algebras. Another ambiguity in field quantisation
- New loop representations for 21 gravity
- Loop Quantum Gravity
- Implications of a positive cosmological constant for general relativity
- Initial conditions for cosmological perturbations
- Introduction to Loop Quantum Gravity and Cosmology
- Mechanics of higher dimensional black holes in asymptotically anti-de Sitter spacetimes
- On the role of space–time topology in quantum phenomena: Superselection of charge and emergence of nontrivial vacua
- Photon inner product and the Gauss-linking number
- Geometric quantization and constrained systems
- Unitarity and ultraviolet regularity in cosmology
- Hamiltonian general relativity and the Belinskii–Khalatnikov–Lifshitz conjecture
- A generalization of tensor calculus and its applications to physics
- Null infinity and Killing fields
- A note on helicity and self‐duality
- On the ambiguity in the notion of transverse traceless modes of gravitational waves
- SU(N) Quantum Yang–Mills theory in two dimensions: A complete solution
- Black Hole Evaporation: A Perspective from Loop Quantum Gravity
- A technique for analyzing the structure of isometries
- Constructing Hamiltonian quantum theories from path integrals in a diffeomorphism-invariant context
- Dynamical black holes: Approach to the final state
- Alleviating the Tension in the Cosmic Microwave Background using Planck-Scale Physics
- Properties of a recent quantum extension of the Kruskal geometry
- Some surprising implications of background independence in canonical quantum gravity
- Physics from geometry
- On angular momentum of stationary gravitating systems
- Gauss linking number and the electromagnetic uncertainty principle
- Compact binary coalescences: The subtle issue of angular momentum
- Action and Hamiltonians in higher-dimensional general relativity: first-order framework
- POLYMER GEOMETRY AT PLANCK SCALE AND QUANTUM EINSTEIN EQUATIONS
- On a basic conceptual confusion in gravitational radiation theory
- Quantum Geometry and Black Holes
- The Big bang and the Quantum
- Symmetry reduced loop quantum gravity: A bird’s eye view
- Geometry and physics of null infinity
- Phase space formulation of general relativity without a 3+1 splitting
- Self duality and quantization
- Compact binary coalescences: constraints on waveforms
- Asymptotics with a positive cosmological constant. IV. The no-incoming radiation condition
- From General Relativity to Quantum Gravity
- Angular Momentum of Isolated Systems in General Relativity
- WEAK FIELD LIMIT OF GENERAL RELATIVITY IN TERMS OF NEW VARIABLES: A HAMILTONIAN FRAMEWORK
- 100 Years of Relativity
- Classical and Quantum Physics of Isolated Horizons: A Brief Overview
- Recent Developments in Quantum Gravity
- Energy-Momentum in General Relativity.
- SYMMETRY REDUCED EINSTEIN GRAVITY AND GENERALIZED σ AND CHIRAL MODELS
- Inferring the gravitational wave memory for binary coalescence events
- Gravitational Dynamics—A Novel Shift in the Hamiltonian Paradigm
- The last 50 years of general relativity and gravitation: from GR3 to GR20 Warsaw conferences
- A 3+1 formulation of Einstein self-duality
- QUANTUM GEOMETRY AND GRAVITY: RECENT ADVANCES
- On the Hamiltonian of general relativity
- Emergence of classical behavior in the early Universe
- Time in fundamental physics
- Geometry in Color Perception
- Asymptotic Properties of Isolated Systems: Recent Developments
- Space and Time: From Antiquity to Einstein and Beyond
- A short review of loop quantum gravity
- Ashtekar variables
- The Simplicity of Black Holes
- Loop Quantum Gravity and the Planck Regime of Cosmology
- The Issue of the Beginning in Quantum Gravity
- Black hole dynamics in general relativity
- On the boundary conditions for gravitational and gauge fields at spatial infinity
- Response to Bryan Roberts: A new perspective on T violation
- A manifestly gauge-invariant approach to quantum theories of gauge fields
- Quantum Space-Times
- Quantum field theory of geometry
- Addressing Challenges of Quantum Gravity Through Quantum Geometry: Black holes and Big-bang
- Overview and outlook
- Gravitational interaction and spontaneous breaking of symmetries
- Cosmic Tango Between the Very Small and the Very Large: Addressing CMB Anomalies Through Loop Quantum Cosmology
- Loop quantum gravity and the very early universe
- Opening lecture
- An Overview
- Editorial: Golden Oldies criteria and procedures
- Remembering Sergio Dain
- Quantum General Relativity
- Quantum General Relativity
- Preface
- A QUANTUM GRAVITY EXTENSION OF THE INFLATIONARY PARADIGM
- General Relativity and Gravitation introduces Consecutive Article Publishing
- LESSONS FROM 2+1 DIMENSIONAL QUANTUM GRAVITY
- Quantum geometry in action: Big bang and black holes
- Editorial
- Polymer Geometry at Planck Scale and Quantum Einstein Equations
- S. Chandrasekhar: A Personal Portrait
- Some Recent Advances in Loop Quantum Cosmology
- Self-duality, quantum gravity, Wilson loops and all that
- Quantum Gravity and Quantum Field Theory in a Curved Space Report of Workshop D1
- Addressing Challenges of Quantum Gravity Through Quantum Geometry: Black holes and Big-bang
- QUANTUM GEOMETRY AND ITS RAMIFICATIONS
- The Winding Road to Quantum Gravity
- LOOP QUANTUM GRAVITY: FOUR RECENT ADVANCES AND A DOZEN FREQUENTLY ASKED QUESTIONS
- Gravity, Geometry and the Quantum
- HOW BLACK HOLES GROW
- From general relativity to quantum gravity
- Framework for twistors
- Penrose's way with relativity
- Quantum Gravity

University of Chicago

Private research university in Chicago, Illinois, United States

Pennsylvania State University

Public university in State College and multiple campuses in Pennsylvania, United States

Utrecht University

University in the Netherlands

Syracuse University

Private university in Syracuse, New York, United States

University of Mumbai

State university in Mumbai, Maharashtra, India

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Public research university in Austin, Texas, United States

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