46 citations · 107 across the 13 of their papers we have counts for
13 papers
Negative Interaction Quench Dynamics of Density-Ordered Dipolar Bosons in a One-Dimensional Optical Lattice
Rhombik Roy, N. D. Chavda, Barnali Chakrabarti +1
We explore the nonequilibrium dynamics of a density-ordered dipolar Bose gas in a finite one-dimensional optical lattice following a negative interaction quench, using the numerica…
Dynamics of one-dimensional Bose-Josephson Junction in a Box Trap: From Coherent Oscillations to Many-Body Dephasing and Dynamical Freezing
Abhik Kumar Saha, L. F. Calazans de Brito, Cesare Vianello +4
Understanding how coherent quantum dynamics give way to correlation-dominated behavior in low-dimensional systems remains a central challenge in quantum many-body physics. Here, we…
One-Dimensional Quench Dynamics in an Optical Lattice: sine-Gordon and Bose-Hubbard Descriptions
Subhrajyoti Roy, Rhombik Roy, Andrea Trombettoni +2
We investigate the dynamics of one-dimensional interacting bosons in an optical lattice after a sudden quench in the Bose-Hubbard (BH) and sine-Gordon (SG) regimes. While in higher…
Rotation quenches in trapped bosonic systems
Rhombik Roy, Sunayana Dutta, Ofir E. Alon
The ground state properties of strongly rotating bosons confined in an asymmetric anharmonic potential exhibit a split density distribution. However, the out-of-equilibrium dynamic…
Assessing small accelerations using a bosonic Josephson junction
Rhombik Roy, Ofir E. Alon
Bosonic Josephson junctions provide a versatile platform for exploring quantum tunneling and coherence phenomena in ultracold atomic systems. While extensive research has examined…
Expansion of strongly interacting dipolar bosons in 1D optical lattices
Rhombik Roy, Andrea Trombettoni, Barnali Chakrabarti
We numerically study the expansion dynamics of initially localized dipolar bosons in a homogeneous 1D optical lattice for different initial states. Comparison is made to interactin…
Quasi-superfluid and Quasi-Mott phases of strongly interacting bosons in shallow optical lattice
Subhrajyoti Roy, Rhombik Roy, Arnaldo Gammal +2
We explore the ground states of strongly interacting bosons in the vanishingly small and weak lattices using the multiconfiguration time-dependent Hartree method for bosons (MCTDHB…
Out of equilibrium many-body expansion dynamics of strongly interacting bosons
Rhombik Roy, Barnali Chakrabarti, Arnaldo Gammal
We solve the Schrödinger equation from first principles to investigate the many-body effects in the expansion dynamics of one-dimensional repulsively interacting bosons released fr…
Dynamics of order-disorder and complexity for interacting bosons in optical lattice
Rhombik Roy, Barnali Chakrabarti, N. D. Chavda +1
The present work reports on the dynamical measures of order, disorder and complexity for the interacting bosons in optical lattice. We report results both for the relaxed state as…
Quantum dynamics of few dipolar bosons in a double-well potential
Rhombik Roy, Barnali Chakrabarti, Andrea Trombettoni
We study the few-body dynamics of dipolar bosons in one-dimensional double-wells. Increasing the interaction strength, by investigating one-body observables, we study in the consid…
Quench dynamics of 1D Bose gas in an optical lattice: does the system relax?
S. Bera, R Roy, A. Gammal +2
Understanding the relaxation process is the most important unsolved problem in non-equilibrium quantum physics. Current understanding primarily concerns on if and how an isolated q…
Phases, many-body entropy measures and coherence of interacting bosons in optical lattices
R. Roy, A. Gammal, M. C. Tsatsos +3
Already a few bosons with contact interparticle interactions in small optical lattices feature a variety of quantum phases: superfluid, Mott-insulator and fermionized Tonks gases c…
Structural and quantum properties of van der Waals cluster near the unitary regime
M. L. Lekala, B. Chakrabarti, S. K. Haldar +2
We study the structural and several quantum properties of three-dimensional bosonic cluster interacting through van der Waals potential at large scattering length. We use Faddeev-t…