161 citations · 1.8k across the 56 of their papers we have counts for
39 papers · 1 filter
Stuckelberg SUSY QED and Infrared Problem
Radhika Vinze, T. R. Govindarajan, Anuradha Misra +1
We review gauge invariant supersymmetric massive gauge theory coupled to matter and Stuckelberg superfields. We focus on the leading order self energy and ve…
Light front QED, Stueckelberg field and Infrared divergence
T. R. Govindarajan, Jai D. More, P. Ramadevi
Stueckelberg mechanism introduces a scalar field, known as Stueckelberg field, so that gauge symmetry is preserved in the massive abelian gauge theory. In this work, we show that t…
Modelling quantum black hole
T. R. Govindarajan, J. M. Munõz-Castañeda
Novel bound states are obtained for manifolds with singular potentials. These singular potentials require proper boundary conditions across boundaries. The number of bound states m…
Fermionic edge states and new physics
T. R. Govindarajan, Rakesh Tibrewala
We investigate the properties of the Dirac operator on manifolds with boundaries in presence of the Atiyah-Patodi-Singer boundary condition. An exact counting of the number of edge…
Quantum field theories with boundaries and novel instabilities
T. R. Govindarajan, V. P. Nair
Quantum physics on manifolds with boundary brings novel aspects due to boundary conditions. One important feature is the appearance of localised negative eigenmodes for the Laplaci…
Entanglement and Particle Identity: A Unifying Approach
A. P. Balachandran, T. R. Govindarajan, Amilcar R. de Queiroz +1
It has been known for some years that entanglement entropy obtained from partial trace does not provide the correct entanglement measure when applied to systems of identical partic…
Twisted bosonization in two dimensional noncommutative spacetime
Asrarul Haque, T. R. Govindarajan
We study the twisted bosonization of massive Thirring model to relate to sine-Gordon model in Moyal spacetime using twisted commutation relations. We obtain the relevant twisted bo…
Electric Dipole Moment from QCD and How It Vanishes for Mixed States
A. P. Balachandran, T. R. Govindarajan, Amilcar R. de Queiroz
In a previous paper [1], we studied the mass and formulated its chirally symmetric coupling to fermions which induces electric dipole moment (EDM). Here we calculate the EDM t…
Phase structures in fuzzy geometries
T R Govindarajan, S. Digal, K. S. Gupta +1
We study phase structures of quantum field theories in fuzzy geometries. Several examples of fuzzy geometries as well as QFT's on such geometries are considered. They are fuzzy sph…
Topological stability of broken symmetry on fuzzy spheres
S. Digal, T. R. Govindarajan
We study the spontaneous symmetry breaking of O(3) scalar field on a fuzzy sphere . We find that the fluctuations in the background of topological configurations are finite.…
Thermofield dynamics and twisted Poincaré symmetry on Moyal space-time
A. P. Balachandran, T. R. Govindarajan
On Moyal space-time, one can implement twisted Poincaré symmetry with the resultant modification of symmetrization and anti-symmetrization postulates for bosons and fermions. We de…
Spontaneous breaking of symmetry in Moyal spacetime with twisted Poincaré symmetry
T R Govindarajan
After briefly reviewing the gauge symmetry in Moyal spacetimes, we analyse aspects of symmetry breaking within a quantisation program preserving the twisted Poincaré symmetry. We d…
Beyond fuzzy spheres
T. R. Govindarajan, Pramod Padmanabhan, T. Shreecharan
We study polynomial deformations of the fuzzy sphere, specifically given by the cubic or the Higgs algebra. We derive the Higgs algebra by quantizing the Poisson structure on a sur…
Deformed Oscillator Algebras and QFT in -Minkowski Spacetime
T. R. Govindarajan, Kumar S. Gupta, E. Harikumar +2
In this paper we study the deformed statistics and oscillator algebras of quantum fields defined in -Minkowski spacetime. The twisted flip operator obtained from the twist assoc…
Spontaneous Symmetry Breaking in Twisted Noncommutative Quantum Theories
A. P. Balachandran, T. R. Govindarajan, S. Vaidya
We analyse aspects of symmetry breaking for Moyal spacetimes within a quantisation scheme which preserves the twisted Poincaré symmetry. Towards this purpose, we develop the LSZ ap…
Twisted Statistics in kappa-Minkowski Spacetime
T. R. Govindarajan, Kumar S. Gupta, E. Harikumar +2
We consider the issue of statistics for identical particles or fields in kappa-deformed spaces, where the system admits a symmetry group G. We obtain the twisted flip operator comp…
Spontaneous symmetry breakdown in fuzzy spheres
C. R. Das, S. Digal, T. R. Govindarajan
We study and analyse the questions regarding breakdown of global symmetry on noncommutative sphere. We demonstrate this by considering a complex scalar field on a fuzzy sphere and…
Finite temperature phase transition of a single scalar field on a fuzzy sphere
C. R. Das, S. Digal, T. R. Govindarajan
We study finite temperature phase transition of neutral scalar field on a fuzzy sphere using Monte Carlo simulations. We work with the zero mode in the temporal directions, while t…
Statistics and UV-IR Mixing with Twisted Poincare Invariance
A. P. Balachandran, T. R. Govindarajan, G. Mangano +3
We elaborate on the role of quantum statistics in twisted Poincare invariant theories. It is shown that, in order to have twisted Poincare group as the symmetry of a quantum theory…
Nonlocal regularisation of noncommutative field theories
T. R. Govindarajan, Seckin Kurkcuoglu, Marco Panero
We study noncommutative field theories, which are inherently nonlocal, using a Poincaré-invariant regularisation scheme which yields an effective, nonlocal theory for energies belo…
Noncommutative Two Dimensional Gravities
A. P. Balachandran, T. R. Govindarajan, K. S. Gupta +1
We give formulations of noncommutative two dimensional gravities in terms of noncommutative gauge theories. We survey their classical solutions and show that solutions of the corre…
Schwarz Type Topological Quantum Field Theories
R. K. Kaul, T. R. Govindarajan, P. Ramadevi
Topological quantum field theories can be used to probe topological properties of low dimensional manifolds. A class of these theories known as Schwarz type theories, comprise of C…
Time-Space Noncommutativity: Quantised Evolutions
A. P. Balachandran, T. R. Govindarajan, A. G. Martins +1
In previous work, we developed quantum physics on the Moyal plane with time-space noncommutativity, basing ourselves on the work of Doplicher et al.. Here we extend it to certain n…
Non-commutative Duality: High Spin Fields and Model with Hopf Term
T. R. Govindarajan, E. Harikumar
We show that the non-commutative model coupled with Hopf term in 3 dimensions is equivalent to an interacting spin- theory where the spin of the dual theory is relate…