42 citations · 121 across the 9 of their papers we have counts for
9 papers
Fragmentation, domain formation and atom number fluctuations of a two-species Bose-Einstein condensate in an optical lattice
Uttam Shrestha, Janne Ruostekoski
We theoretically study the loading of a two-species Bose-Einstein condensate to an optical lattice in a tightly-confined one-dimensional trap. Due to quantum fluctuations the relat…
Antiferromagnetism in a bosonic mixture of rubidium (Rb) and potassium (K)
Uttam Shrestha
We simulate the experimental possibility of observing the antiferromagnetic (AF) order in the bosonic mixtures of rubidium (Rb) and potassium (K) in a two-dimensional…
Correlated bosons in a one-dimensional optical lattice: Effects of the trapping potential and of quasiperiodic disorder
Uttam Shrestha, Michele Modugno
We investigate the effect of the trapping potential on the quantum phases of strongly correlated ultracold bosons in one-dimensional periodic and quasiperiodic optical lattices. By…
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…