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Nonlinear Phenomenology from Quantum Mechanics: Soliton in a Lattice
Juha Javanainen, Uttam Shrestha
We study a soliton in an optical lattice holding bosonic atoms quantum mechanically using both an exact numerical solution and quantum Monte Carlo simulations. The computation of t…
Pulsating and persistent vector solitons in a Bose-Einstein condensate in a lattice upon phase separation instability
Uttam Shrestha, Juha Javanainen, Janne Ruostekoski
We study numerically the outcome of the phase separation instability of a dual-species Bose-Einstein condensate in an optical lattice. When only one excitation mode is unstable a b…
Quantum dynamics of instability-induced pulsations of a Bose-Einstein condensate in an optical lattice
Uttam Shrestha, Juha Javanainen, Janne Ruostekoski
We study the dynamics of a Bose-Einstein condensate in a one-dimensional optical lattice in the limit of weak atom-atom interactions, including an approximate model for quantum flu…