20 citations · 64 across the 15 of their papers we have counts for
15 papers
Accuracy of the Gross-Pitaevskii Equation in a Double-Well Potential
Asaad R. Sakhel, Robert J. Ragan, William J. Mullin
The Gross-Pitaevskii equation (GPE) in a double well potential produces solutions that break the symmetry of the underlying non-interacting Hamiltonian, i.e., asymmetric solutions.…
The Gross-Pitaevskii equation for a infinite square-well with a delta-function barrier
Robert J. Ragan, Asaad R. Sakhel, William J. Mullin
The Gross-Pitaevskii equation is solved by analytic methods for an external double-well potential that is an infinite square well plus a -function central barrier. We find solut…
Characterization of the energy level-structure of a trapped dipolar Bose gas via mean-field parametric resonances
Asaad R. Sakhel, Roger R. Sakhel
We report parametric resonances (PRs) in the mean-field dynamics of a one-dimensional dipolar Bose-Einstein condensate (DBEC) in widely varying trapping geometries. The chief goal…
Conditions for order and chaos in the dynamics of a trapped Bose-Einstein condensate in coordinate and energy space
Roger R. Sakhel, Asaad R. Sakhel, Humam B. Ghassib +1
We investigate numerically conditions for order and chaos in the dynamics of an interacting Bose- Einstein condensate (BEC) confined by an external trap cut off by a hard-wall box…
Long-time averaged dynamics of a Bose-Einstein condensate in a bichromatic optical lattice with external harmonic confinement
Asaad R. Sakhel
The dynamics of a Bose-Einstein condensate are examined numerically in the presence of a one-dimensional bichromatic optical lattice with external harmonic confinement. The condens…
Properties of bosons in a one-dimensional bichromatic optical lattice in the regime of the Sine-Gordon transition: a Worm Algorithm Monte Carlo study
Asaad R. Sakhel
The properties of interacting bosons in a weak, one-dimensional, and bichromatic optical with a rational ratio of the constituting wavelengths and are numerically exami…
Momentum density and phase maps of a two-dimensional trapped Bose-Einstein condensate excited by a red laser
Roger R. Sakhel, Asaad R. Sakhel, Humam B. Ghassib
We investigate numerically the momentum density and phase maps in coordinate and momentum space of a two dimensional Bose-Einstein condensate (BEC) excited by a moving red-de…
Energy and condensate dynamics of a Bose-Einstein condensate excited by a moving red laser potential inside a power law trap cutoff by box potential hard walls
Roger R. Sakhel, Asaad R. Sakhel
We explore the energy dynamics of a two dimensional (2D) trapped Bose-Einstein condensate (BEC) excited by a moving red-detuned laser potential (RDLP). The trap is a combination of…
Onset time for energy oscillations in a two-dimensional trapped Bose gas excited by a red laser potential
Roger R. Sakhel, Asaad R. Sakhel
We explore the energy dynamics of a two dimensional (2D) harmonically trapped Bose-Einstein condensate inside a box potential, excited by a moving red-detuned laser potential (RDLP…
Self-interfering matter-wave patterns generated by a moving laser obstacle in a two-dimensional Bose-Einstein condensate inside a power trap cut off by box potential boundaries
Roger R. Sakhel, Asaad R. Sakhel, Humam B. Ghassib
We report the observation of highly energetic self-interfering matter-wave (SIMW) patterns generated by a moving obstacle in a two-dimensional Bose-Einstein condensate (BEC) inside…
Global and local condensate and superfluid fraction of a few hard core bosons in a cubic optical lattice plus external harmonic confinement
Asaad R. Sakhel
We explore the global and local condensate and superfluid (SF) fractions in a system of a few hard core (HC) bosons (N=8 and N=40) trapped inside a combined harmonic optical cubic…
A Comprehensive Study of the He-He II Sandwich System Using Monte Carlo Techniques
Amer Al-Oqali, Asaad R. Sakhel, Humam B. Ghassib
We present a numerical investigation of the thermal and structural properties of the He-He II sandwich system adsorbed on a graphite substrate using the Worm Algorithm Quantum…
Generalized Bose-Einstein Condensation
William J. Mullin, Asaad R. Sakhel
Generalized Bose-Einstein condensation (GBEC) involves condensates appearing simultaneously in multiple states. We review examples of the three types in an ideal Bose gas with diff…
Thermodynamic properties of an interacting hard-sphere Bose gas in a trap using the static fluctuation approximation
Saleem I. Qashou, Mohamed K. Al-Sugheir, Asaad R. Sakhel +1
A hard-sphere (HS) Bose gas in a trap is investigated at finite temperatures in the weakly-interacting regime and its thermodynamic properties are evaluated using the static fluctu…
Tunneling of a few strongly repulsive hard-sphere bosons in an optical lattice with tight external harmonic confinement: A quantum Monte Carlo investigation in continuous space
Asaad R. Sakhel, Jonathan L. Dubois, Roger R. Sakhel
The effect of strongly repulsive interactions on the tunneling amplitude of hard-sphere (HS) bosons confined in a simple cubic (sc) optical lattice plus tight external harmonic con…