104 citations · 1.2k across the 72 of their papers we have counts for
77 papers
Quantum gases on a torus
A. A. Araújo Filho, J. A. A. S. Reis, Subir Ghosh
This manuscript is aimed at studying the thermodynamic properties of quantum gases confined to a torus. To do that, we consider \textit{noninteracting} gases within the grand canon…
Divergence Anomaly and Schwinger Terms: Towards a Consistent Theory of Anomalous Classical Fluid
Arpan Krishna Mitra, Subir Ghosh
Anomaly, a generic feature of relativistic quantum field theory, is shown to be present in non-relativistic classical ideal fluid. A new result is the presence of anomalous terms i…
Quantum corrections enhance chaos: study of particle motion near a generalized Schwarzschild black hole
Avijit Bera, Surojit Dalui, Subir Ghosh +1
The paper is devoted to a detailed study of the effects of quantum corrections on the chaotic behavior in the dynamics of a (massless) probe particle near the horizon of a generali…
Fermions on a torus knot
A. A. Araújo Filho, J. A. A. S. Reis, Subir Ghosh
In this work, we investigate the effects of a nontrivial topology (and geometry) of a system considering \textit{interacting} and \textit{noninteracting} particle modes, which are…
Uncertainty Relations for the Relativistic Jackiw-Nair Anyon: A First Principles Derivation
Joydeep Majhi, Subir Ghosh
In this paper we have explicitly computed the and (Heisenberg) Uncertainty Relations for the model of relativistic particles with arbitrary…
Quantum Back Flow Across a Black Hole Horizon in a Toy Model Approach
Dripto Biswas, Subir Ghosh
Quantum Back Flow (QBF), discovered quite a few years back, is a generic purely quantum phenomenon, in which the probability of finding a particle in a direction is non-zero (and i…
Non-trivial time crystal-like ground state for gravitational perturbation in quadratic gravity
Sumanta Chakraborty, Subir Ghosh
We consider gravitational perturbation around maximally symmetric background of a theory of gravity involving quadratic curvature correction. This leads to a decoupled model of the…
Constant Approximation Algorithms for Guarding Simple Polygons using Vertex Guards
Pritam Bhattacharya, Subir Kumar Ghosh, Sudebkumar Pal
The art gallery problem enquires about the least number of guards sufficient to ensure that an art gallery, represented by a simple polygon , is fully guarded. Most standard ver…
Particle on a Torus Knot: Anholonomy and Hannay Angle
Subir Ghosh
The phenomenon of rotation of a vector under parallel transport along a closed path is known as anholonomy. In this paper we have studied the anholonomy for noncontractible loops -…
Motion of charged particle in Reissner-Nordstrom spacetime: A Jacobi metric approach
Praloy Das, Ripon Sk, Subir Ghosh
The present work discusses motion of neutral and charged particles in Reissner - Nordstrom spacetime. The constant energy paths are derived in a variational principle framework usi…
On the equivalence among stress tensors in a gauge-fluid system
Arpan Krishna Mitra, Rabin Banerjee, Subir Ghosh
In this paper we bring out the subtleties involved in the study of a first order relativistic field theory with auxiliary field variables playing an essential role. In particular w…
Noncommutative Geometry and Fluid Dynamics
Praloy Das, Subir Ghosh
In the present paper we have developed a Non-Commutative (NC) generalization of perfect fluid model from first principles, in a Hamiltonian framework. The noncommutativity is intro…
Particle on a Torus Knot: Constrained Dynamics and Semi-Classical Quantization in a Magnetic Field
Praloy Das, Souvik Pramanik, Subir Ghosh
Kinematics and dynamics of a particle moving on a torus knot poses an interesting problem as a constrained system. In the first part of the paper we have derived the modified sympl…
AdS-CFT Correspondence in Noncommutative background, related thermodynamics and Holographic Superconductor in Magnetic Field
Souvik Pramanik, Subir Ghosh
In this work, we formulate a Non-Commutative (NC) extension of AdS-CFT correspondence that is manifested in the modification of behavior of a holographic superconductor. The noncom…
Identifying collusion groups using spectral clustering
Suneel Sarswat, Kandathil Mathew Abraham, Subir Kumar Ghosh
In an illiquid stock, traders can collude and place orders on a predetermined price and quantity at a fixed schedule. This is usually done to manipulate the price of the stock or t…
Particle on a torus knot: a Hamiltonian analysis
Praloy Das, Subir Ghosh
We have studied the dynamics and symmetries of a particle constrained to move in a torus knot. The Hamiltonian system turns out to be Second Class in Dirac's formulation and the Di…
A National Effort for Motivating Indian Students and Teachers towards Algorithmic Research
Subir Kumar Ghosh, Sudebkumar Prasant Pal
During 2008-2015, twenty-two introductory workshops on graph and geometric algorithms were organized for teachers and students (undergraduate, post-graduate and doctoral) of engine…
Effects of a Maximal Energy Scale in Thermodynamics for Photon Gas and Construction of Path Integral
Sudipta Das, Souvik Pramanik, Subir Ghosh
In this article, we discuss some well-known theoretical models where an observer-independent energy scale or a length scale is present. The presence of this invariant scale necessa…
Hamiltonian analysis of interacting fluids
Rabin Banerjee, Subir Ghosh, Arpan Krishna Mitra
Ideal fluid dynamics is studied as a relativistic field theory with particular importance on its hamiltonian structure. The Schwinger condition, whose integrated version yields the…
Approximability of Guarding Weak Visibility Polygons
Pritam Bhattacharya, Subir Kumar Ghosh, Bodhayan Roy
The art gallery problem enquires about the least number of guards that are sufficient to ensure that an art gallery, represented by a polygon , is fully guarded. In 1998, the pr…
Conformal Invariance in noncommutative geometry and mutually interacting Snyder Particles
Souvik Pramanik, Subir Ghosh, Probir Pal
A system of relativistic Snyder particles with mutual two-body interaction that lives in a Non-Commutative Snyder geometry is studied. The underlying novel symplectic structure is…
Noncommutative Extension of AdS-CFT and Holographic Superconductors
Souvik Pramanik, Sudipta Das, Subir Ghosh
In this Letter, we consider a Non-Commutative (NC) extension of AdS-CFT correspondence and its effects on holographic superconductors. NC corrections are incorporated via the NC ge…
Four-connected triangulations of planar point sets
Ajit Arvind Diwan, Subir Kumar Ghosh, Bodhayan Roy
In this paper, we consider the problem of determining in polynomial time whether a given planar point set of points admits 4-connected triangulation. We propose a necessary…
Spontaneous Photoemission From Metamaterial Junction: A Conjecture
Subir Ghosh, Santanu K. Maiti
The possibility of spontaneous photon pair emission from a normal material - metamaterial junction is investigated in a quantum field theory setting. We consider a pair of photons…