Publications (46)
Quantum Hall Skyrmions in the framework of O(4) Non-linear Sigma Model
B. Basu, S. Dhar, P. Bandyopadhyay
A new framework for quantum Hall skyrmions in O(4) nonlinear sigma model is studied here. The size and energy of the skyrmions are determined incorporating the quartic stability te…
High Superconductivity, Skyrmions and the Berry Phase
B. Basu, S. Dhar, P. Bandyopadhyay
It is here pointed out that the antiferromagnetic spin fluctuation may be associated with a gauge field which gives rise to the antiferromagnetic ground state chirality. This is as…
Quantum Cournot equilibrium for the Hotelling-Smithies model of product choice
Ramij Rahaman, Priyadarshi Majumdar, B. Basu
This paper demonstrates the quantization of a spatial Cournot duopoly model with product choice, a two stage game focusing on non-cooperation in locations and quantities. With quan…
Effect of non-uniform exchange field in ferromagnetic graphene
Debashree Chowdhury, B. Basu
We have presented here the consequences of the non-uniform exchange field on the spin transport issues in spin chiral configuration of ferromagnetic graphene. Taking resort to the…
Relation between concurrence and Berry phase of an entangled state of two spin 1/2 particles
B. Basu
We have studied here the influence of the Berry phase generated due to a cyclic evolution of an entangled state of two spin 1/2 particles. It is shown that the measure of formation…
Effect of spin rotation coupling on spin transport
Debashree Chowdhury, B. Basu
We have studied the spin rotation coupling(SRC) as an ingredient to explain different spin related issues. This special kind of coupling can play the role of a Dresselhaus like cou…
A Geometrical Approach towards Entanglement
B. Basu, P. Bandyopadhyay
We have studied the concurrence of two-site entanglement and have shown that it is related to the geometric phase accumulated due to a complete rotation of the entangled state. The…
Fractional Quantum Hall Edge Electrons, Chiral Anomaly and the Berry Phase
B. Basu, P. Bandyopadhyay
It is shown that the deviation of fractional quantum Hall edge fluid from power law correlation functions with universal exponent as observed in recent experiment may be…
Consumer Expenditure Distribution in India, 1983-2007: Evidence of a Long Pareto Tail
Abhik Ghosh, Kausik Gangopadhyay, B. Basu
This work presents an empirical study of the evolution of the consumer expenditure distribution in India during 1982-2007. We have used the National Sample Survey Organization data…
Mutated Hilltop Inflation : A Natural Choice for Early Universe
Barun Kumar Pal, Supratik Pal, B. Basu
We propose a model of inflation with a suitable potential for a single scalar field which falls in the wide class of hilltop inflation. We derive the analytical expressions for mos…
Spin Transport in non-inertial frame
Debashree Chowdhury, B. Basu
The influence of acceleration and rotation on spintronic applications is theoretically investigated. In our formulation, considering a Dirac particle in a non-inertial frame, diffe…
Spin-Orbit gauge and quantum spin Hall effect
B. Basu, P. Bandyopadhyay
We have shown that the non-Abelian spin-orbit gauge field strength of the Rashba and Dresselhaus interactions, when split into two Abelian field strengths, the Hamiltonian of the s…
Polarization Of Quantum Hall States, Skyrmions and Berry Phase
B. Basu, S. Dhar, P. Bandyopadhyay
We have discussed here the polarization of quantum Hall states in the framework of the hierarchical analysis of IQHE and FQHE in terms of Berry phase. It is observed that we have f…
Pairing in High Temperature Superconductors and Berry Phase
D. Pal, B. Basu
The topological approach to the understanding of pairing mechanism in high superconductors analyses the relevance of the Berry phase factor in this context. This also gives t…
Dynamics of geometric phase in the adiabatic limit of quantum phase transition
B. Basu
The geometric phase associated with a many body ground state exhibits a signature of quantum phase transition. In this context, we have studied the behaviour of the geometric phase…
The geometric phase and the dynamics of quantum phase transition induced by a linear quench
B. Basu, P. Bandyopadhyay
We have analysed here the role of the geometric phase in dynamical mechanism of quantum phase transition in the transverse Ising model. We have investigated the system when it is d…
Novel Families of Fractional Quantum Hall States : A Berry Phase Approach
B. Basu, P. Bandyopadhyay
We have studied here the newly observed families of fractional quantum Hall states in the framework of Berry phase. It has been shown that this approach embraces in a unified way t…
Quantum phases and dynamics of geometric phase in a quantum spin chain system under linear quench
Sujit Sarkar, B. Basu
We study the quantum phases of anisotropic XY spin chain system in presence and absence of adiabatic quench. A connection between geometric phase and criticality is established fro…
Berry phase and fidelity susceptibility of the three-qubit Lipkin-Meshkov-Glick ground state
Erik Sjöqvist, Ramij Rahaman, Urna Basu +1
Berry phases and quantum fidelities for interacting spins have attracted considerable attention, in particular in relation to entanglement properties of spin systems and quantum ph…
Magnus Force on Quantum Hall Skyrmions and Vortices
S. Dhar, B. Basu, P. Bandyopadhyay
We have discussed here the Magnus force acting on the vortices and skyrmions in the quantum Hall systems. We have found that it is generated by the chirality of the system which is…
Quantum dot with spin-orbit interaction in noncommutative phase space and analog Landau levels
B. K. Pal, B. Roy, B. Basu
We have studied a quantum dot with Rashba spin orbit interaction on a plane where the position and momentum coordinates are considered to be noncommutative. The energy spectrum of…
Charge and Statistics of Quasiparticles in Fractional Quantum Hall Effec
B. Basu, P. Bandyopadhyay, S. Dhar
We have studied here the charge and statistics of quasiparticle excitations in FQH states on the basis of the Berry phase approach incorporating the fact that even number of flux q…
On atomic analogue of Landau quantization
B. Basu, S. Dhar, S. Chatterjee
We have studied the physics of atoms with permanent electric dipole moment and non vanishing magnetic moment interacting with an electric field and inhomogeneous magnetic field. Th…
The Morphology of Urban Agglomerations for Developing Countries: A Case Study with China
Kausik Gangopadhyay, B. Basu
In this article, the relationship between two well-accepted empirical propositions regarding the distribution of population in cities, namely, Gibrat's law and Zipf's law, are rigo…
Topological Aspects of High Temperature Superconductivity and Berry Phase
B. Basu
We propose a mechanism of high temperature superconductivity from the viewpoint of chirality and Berry phase. It is observed that spin pairing and charge pairing is caused by a gau…
Topological Aspects Of Spin Pairing in High Superconductivity and Berry Phase
D. Pal, B. Basu
From topological viewpoint we have analysed the role of Berry phase in spin pairing mechanism of high superconducting state.
Inertial effect on spin orbit coupling and spin transport
B. Basu, Debashree Chowdhury
We theoretically study the renormalization of inertial effects on the spin dependent transport of conduction electrons in a semiconductor by taking into account the interband mixin…
Magnus Force in High Temperature Superconductivity and Berry Phase
D. Pal, B. Basu, P. Bandyopadhyay
In the topological framework of high temperature superconductivity we have discussed the Magnus force acting on its vortices.
The Berry phase in ferromagnetic spin systems and anomalous Hall Effect
B. Basu, P. Bandyopadhyay
We have shown that the study of topological aspects of the underlying geometry in a ferromagnetic spin system gives rise to an intrinsic Berry phase. This real space Berry phase ar…
Cosmic Alternator for the Onset of Large-Scale Magnetic Fields
B. Coppi, B. Basu
Magnetic field configurations extending over macroscopic scale distances are shown to be generated in rarefied collisionless plasmas when non-thermal and spatially inhomogeneous el…
Noncommutative Geometry, Quantum Hall Effect and Berry Phase
B. Basu, P. Bandyopadhyay
Taking resort to Haldane's spherical geometry we can visualize fractional quantum Hall effect on the noncommutative manifold with and odd. The discrete space…
The effect of inertia on the Dirac electron, the spin Hall current and the momentum space Berry curvature
Debashree Chowdhury, B. Basu
We have studied the spin dependent force and the associated momentum space Berry curvature in an accelerating system. The results are derived by taking into consideration the non r…
Confronting quasi-exponential inflation with WMAP seven
Barun Kumar Pal, Supratik Pal, B. Basu
We confront quasi-exponential models of inflation with WMAP seven years dataset using Hamilton Jacobi formalism. With a phenomenological Hubble parameter, representing quasi expone…
Spin Entanglement of Two delocalised Fermions and Berry Phase
B. Basu, P. Bandyopadhyay
We have studied the entanglement of identical fermions in two spatial regions in terms of the Berry phase acquired by their spins. The analysis is done from the viewpoint of the ge…
Non-thermal fusion burning processes, relevant collective modes and gained perspectives
B. Coppi, B. Basu
New tridimensional plasma structures, that are oscillatory and classified as non-separable ballooning modes, can emerge in inhomogeneous plasmas and undergo resonant mode-particle…
Effect of cosmic string on spin dynamics
Debashree Chowdhury, B. Basu
In the present paper, we have investigated the role of cosmic string on spin current and Hall electric field. Due to the background cosmic string, the modified electric field of th…
A semi-analytical approach to perturbations in mutated hilltop inflation
Barun Kumar Pal, Supratik Pal, B. Basu
We study cosmological perturbations and observational aspects for mutated hilltop model of inflation. Employing mostly analytical treatment, we evaluate observable parameters durin…
Statistics of Quasiparticles in Fractional Quantum Hall States
B. Basu, P. Bandyopadhay
We have considered here the statistics parameter for quasiparticles in FQH states from an analysis of these states in the framework of chiral anomaly and Berry phase. It is shown t…
Inertial spin Hall effect in noncommutative space
B. Basu, Debashree Chowdhury, Subir Ghosh
In the present paper the study of inertial spin current(that appears in an accelerated frame of reference) is extended to Non-Commutative (NC) space. The -dependence, ( bei…
The Berry phase in inflationary cosmology
Barun Kumar Pal, Supratik Pal, B. Basu
We derive an analogue of the Berry phase associated with inflationary cosmological perturbations of quantum mechanical origin by obtaining the corresponding wavefunction. We have f…
Spin Hall Effect For Anyons
S. Dhar, B. Basu, Subir Ghosh
We explain the intrinsic spin Hall effect from generic anyon dynamics in the presence of external electromagnetic field. The free anyon is represented as a spinning particle with a…
Topological Aspect of high- Superconductivity, Fractional Quantum Hall Effect and Berry Phase
B. Basu, D. Pal, P. Bandyopadhyay
We have analysed here the equivalence of RVB states with FQH states in terms of the Berry Phase which is associated with the chiral anomaly in 3+1 dimensions. It is observ…
City Size Distributions For India and China
Kausik Gangopadhyay, B. Basu
This paper studies the size distributions of urban agglomerations for India and China. We have estimated the scaling exponent for the Zipf's law with the Indian census data for the…
Quantum Hall Effect In Bilayer Systems And The Noncommutative Plane: A Toy Model Approach
B. Basu, Subir Ghosh
We have presented a quantum mechanical toy model for the study of Coulomb interactions in Quantum Hall (QH) system. Inclusion of Coulomb interaction is essential for the study of {…
Multi-pronged events from Coulomb fission of nuclei at very low energies
B. Basu, S. Dey, D. Gupta +4
Multi-pronged tracks have been recorded in the polyethylene terephthalate (CHO) solid state nuclear track detector by exposure to a Cf fission source. Af…
Noncommutative Geometry and Geometric Phases
B. Basu, Subir Ghosh, S. Dhar
We have studied particle motion in generalized forms of noncommutative phase space, that simulate monopole and other forms of Berry curvature, that can be identified as effective i…