58 citations · 410 across the 51 of their papers we have counts for
14 papers · 1 filter
Entangled states, Lorentz transformations, Spin-precession in magnetic fields
A. Chakrabarti
Two positive mass, spin particles created in an entangled state are studied in the presence of a constant magnetic field inducing distinct precessions, depending on the…
Higher order curvature generalisations of Bartnick-McKinnon and coloured black hole solutions in
Yves Brihaye, A. Chakrabarti, Betti Hartmann +1
We construct globally regular as well as non-abelian black hole solutions of a higher order curvature Einstein-Yang-Mills (EYM) model in dimensions. This model consists of th…
Nonlinear transforms of momenta and Planck scale limit
A. Chakrabarti
Starting with the generators of the Poincaré group for arbitrary mass (m) and spin (s) a nonunitary transformation is implemented to obtain momenta with an absolute Planck scale li…
Non-factorisable metrics and Gauss--Bonnet terms in higher dimensions
B. Abdesselam, A. Chakrabarti, J. Rizos +1
An iterative construction of higher order Einstein tensors for a maximally Gauss-Bonnet extended gravitational Lagrangian was introduced in a previous paper. Here the formalism is…
Particle-like solutions to higher order curvature Einstein--Yang-Mills systems in d dimensions
Y. Brihaye, A. Chakrabarti, D. H. Tchrakian
We consider the superposition of the first two members of the gravitational hierarchy (Einstein plus first Gauss-Bonnet(GB)) interacting with the superposition of the first two mem…
Gravitation with superposed Gauss--Bonnet terms in higher dimensions: Black hole metrics and maximal extensions
A. Chakrabarti, D. H. Tchrakian
Our starting point is an iterative construction suited to combinatorics in arbitarary dimensions d, of totally anisymmetrised p-Riemann 2p-forms (2p\le d) generalising the (1-)Riem…
Antisymmetrised 2p-forms generalising curvature 2-forms II: a p-hierarchy of Reissner-Nordstrom type metrics in dimensions d>2p+1
A. Chakrabarti, D. H. Tchrakian
The p-hierarchy of Schwarzschild type metrics obtained in a preceing paper is generalised here to a corresponding Reissner-Nordstrom (RN) type hierarchy in the presence of a point…
Finite energy/action solutions of Yang-Mills equations on Schwarzschild and deSitter backgrounds for dimension
Y. Brihaye, A. Chakrabarti, D. H. Tchrakian
Physically relevant gauge and gravitational theories can be seen as special members of hierarchies of more elaborate systems. The Yang-Mills (YM) system is the first member of a hi…
Antisymmetrised 2p-forms generalising curvature 2-forms and a corresponding p-hierarchy of Schwarzschild type metrics in dimensions d>2p+1
A. Chakrabarti, D. H. Tchrakian
Starting with the curvature 2-form a recursive construction of totally antisymmetrised 2p-forms is introduced, to which we refer as p-Riemann tensors. Contraction of indices permit…
Nonselfdual solutions for gauge fields in Schwarzschild and deSitter backgrounds for dimension
A. Chakrabarti
A particularly simple class of nonselfdual solutions are obtained for gauge fields in Schwarzschild and deSitter backgrounds. For Lorentz signature these have finite energy and fin…
Implementation of an iterative map in the construction of (quasi)periodic instantons: chaotic aspects and discontinuous rotation numbers
A. Chakrabarti
An iterative map of the unit disc in the complex plane (Appendix) is used to explore certain aspects of selfdual, four dimensional gauge fields (quasi)periodic in the Euclidean tim…
Spherically Symmetric Istantons of the Scale Invariant SU(2) Gauged Grassmannian Model in d=4
A. Chakrabarti, D. H. Tchrakian
(Anti)self-dual solutions of the scale invariant SU(2) gauged Grassmanian model are sought. A stronger (anti)selfduality condition for this system is defined, referred to as strong…
Representations of and Non-Minimal -Deformation
B. Abdesselam, D. Arnaudon, A. Chakrabarti
Representations of can be constructed on bases such that either the Chevalley triplet or has the standard $SU(2)_{q}…
and Contraction
Amitabha Chakrabarti
Representations of are constructed explicitly on the Chevalley basis for all , generic and root of unity. Matrix elements of the generators are obtained for all repr…