Priyam Das

Controlled Generation of Nonlinear Resonances through Sinusoidal Lattice Modes in Bose-Einstein Condensate

We study Bose-Einstein condensate in the combined presence of time modulated optical lattice and harmonic trap in the mean-field approach. Through the self-similar method, we show the existence of sinusoidal lattice modes in this inhomogeneous system, commensurate with the lattice potential. A significant advantage of this system is wide tunability of the parameters through chirp management. The combined effect of the interaction, harmonic trap and lattice potential leads to the generation of nonlinear resonances, exactly where the matter wave changes its direction. When the harmonic trap is switched off, the BEC undergoes a nonlinear compression for the static optical lattice potential. For better understanding of chirp management and the nature of the sinusoidal excitation, we investigate the energy spectrum of the condensate, which clearly reveals the generation of nonlinear resonances in the appropriate regime. We have also identified a classical dynamical phase transition occurring in the system, where loss of superfluidity takes the superfluid phase to an insulating state.

Collectively induced many-vortices topology via rotatory Dicke quantum phase transition

We examine the superradiance of a Bose-Einstein condensate pumped with a Laguerre-Gaussian laser of high winding number, e.g.,

Realization of negative mass regime and bound state of solitons in inhomogeneous Bose-Einstein condensates

\ell = 7

On the response of a Bose-Einstein condensate exposed to two counterpropagating ultra-fast laser beams

. The laser beam transfers its orbital angular momentum (OAM) to the condensate at once due to the collectivity of the superradiance. An

Chemical Oscillation in Ultracold Chemistry

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Quantum State Transfer through Coherent Atom-Molecule Conversion in Bose-Einstein Condensate

-fold rotational symmetric structure emerges with the take place of rotatory superradiance.

New cross-phase modulated localized solitons in coupled atomic-molecular BEC

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Effect of an Impurity on Grey Soliton Dynamics in Cigar-Shaped Bose-Einstein Condensate

number of single-charge vortices appear at the arms of this structure. Even though the pump and the condensate profiles initially have cylindrical symmetry, we observe that it is broken to

New Density Wave Ground States and Dynamical Phase Transitions in an Optical Lattice

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Loss of Superfluidity in Bose-Einstein Condensate in an Optical lattice with Two- and Three-Body Interactions

-fold rotational symmetry during the superradiance. Breaking of the cylindrical symmetry into the