Spin-Orbit gauge and quantum spin Hall effect (2008)
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 system can be...
Experimental study of nonlinear dust acoustic solitary waves in a dusty plasma (2008)
Bandyopadhyay, P., Prasad, G., Sen, A., Kaw, P. K.
The excitation and propagation of finite amplitude low frequency solitary waves are investigated in an Argon plasma impregnated with kaolin dust particles. A nonlinear longitudinal dust acoustic...
Driven transverse shear waves in a strongly coupled dusty plasma (2008)
Bandyopadhyay, P., Prasad, G., Sen, A., Kaw, P. K.
The linear dispersion properties of transverse shear waves in a strongly coupled dusty plasma are experimentally studied by exciting them in a controlled manner with a variable frequency external...
Spin Entanglement of Two delocalised Fermions and Berry Phase (2007)
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 geometrical...
A Geometrical Approach towards Entanglement (2007)
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 geometric phase...
The Berry phase in ferromagnetic spin systems and anomalous Hall Effect (2007)
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 arises due to the...
A new diagnostic to characterize a plasma crystal (2006)
Annaratone, B. M., Bandyopadhyay, P., Chaudhuri, M., Morfill, G. E.
Measurement of the free electrons in a plasma crystal (2006)
Annaratone, B. M., Bandyopadhyay, P., Chaudhuri, M., Morfill, G. E.
Charge and Statistics of Quasiparticles in Fractional Quantum Hall Effec (2005)
Basu, B., Bandyopadhyay, P., Dhar, S.
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 quanta can be gauged...
Qubit rotation and Berry Phase (2005)
Banerjee, D., Bandyopadhyay, P.
A quantized fermion can be represented by a scalar particle encircling a magnetic flux line. It has the spinor structure which can be constructed from quantum gates and qubits. We have studied here...
Fractional Quantum Hall Edge Electrons, Chiral Anomaly and the Berry Phase (2004)
It is shown that the deviation of fractional quantum Hall edge fluid from power law correlation functions with universal exponent $\alpha=1/\nu$ as observed in recent experiment may be explained when...
Novel Families of Fractional Quantum Hall States : A Berry Phase Approach (2003)
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 the whole spectrum...
Noncommutative Geometry, Quantum Hall Effect and Berry Phase (2003)
Taking resort to Haldane's spherical geometry we can visualize fractional quantum Hall effect on the noncommutative manifold $M_4 \times Z_N$ with $N>2$ and odd. The discrete space leads to the...
High $T_c$ Superconductivity, Skyrmions and the Berry Phase (2003)
Basu, B., Dhar, S., Bandyopadhyay, P.
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 associated with the...
Polarization Of Quantum Hall States, Skyrmions and Berry Phase (2003)
Basu, B., Dhar, S., Bandyopadhyay, P.
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 fully polarized...
Magnus Force in High Temperature Superconductivity and Berry Phase (2002)
Pal, D., Basu, B., Bandyopadhyay, P.
In the topological framework of high temperature superconductivity we have discussed the Magnus force acting on its vortices.
Magnus Force on Quantum Hall Skyrmions and Vortices (2002)
Dhar, S., Basu, B., Bandyopadhyay, P.
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 associated with...
Quantum Hall Skyrmions in the framework of O(4) Non-linear Sigma Model (2002)
Basu, B., Dhar, S., Bandyopadhyay, P.
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 term in the...
Identification of a Vibrational Frequency Corresponding to H-atom Translocation in Hypericin¶ (2001)
B. M. Showalter, A. Datta, P. K. Chowdhury, J. Park, P. Bandyopadhyay, P. K. Choudhury, ...
Using time-resolved infrared spectroscopy, ab initio quantum mechanical calculations and synthetic organic chemistry a region in the infrared spectrum of triplet hypericin has been found between 1400...
Basu, B., Pal, D., Bandyopadhyay, P.
We have analysed here the equivalence of RVB states with $\nu=1/2$ FQH states in terms of the Berry Phase which is associated with the chiral anomaly in 3+1 dimensions. It is observed that the...
Lipton, H L, Calenoff, M, Bandyopadhyay, P, Miller, S D, Dal Canto, M C, Gerety, S, ...
RNA transcripts derived from recombinant chimeras between the highly virulent GDVII virus and the less virulent BeAn virus were constructed to study the molecular pathogenesis of Theiler's murine...
Lipton, H L, Calenoff, M, Bandyopadhyay, P, Miller, S D, Dal Canto, M C, Gerety, S, ...
RNA transcripts derived from recombinant chimeras between the highly virulent GDVII virus and the less virulent BeAn virus were constructed to study the molecular pathogenesis of Theiler's murine...