160 citations · 1.7k across the 43 of their papers we have counts for
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Arrays of strongly-coupled atoms in a one-dimensional waveguide
Janne Ruostekoski, Juha Javanainen
We study the cooperative optical coupling between regularly spaced atoms in a one-dimensional waveguide using decompositions to subradiant and superradiant collective excitation ei…
Emergence of correlated optics in one-dimensional waveguides for classical and quantum atomic gases
Janne Ruostekoski, Juha Javanainen
We analyze the emergence of correlated optical phenomena in the transmission of light through a waveguide that confines classical or ultracold quantum degenerate atomic ensembles.…
Ground state of the double-well condensate for quantum metrology
Juha Javanainen, Han Chen
We discuss theoretically the ground state of a Bose-Einstein condensate with attractive atom-atom interactions in a double-well trap as a starting point of Heisenberg-limited atom…
Optimal measurement precision of a nonlinear interferometer
Juha Javanainen, Han Chen
We study the best attainable measurement precision when a double-well trap with bosons inside acts as an interferometer to measure the energy difference of the atoms on the two sid…
One- and two-atom states in a rotating ring lattice
Juha Javanainen, Otim Odong, Jerome C. Sanders
We study the states of one and two atoms in a rotating ring lattice in a Hubbard type tight-binding model. The model is developed carefully from basic principles in order to proper…
Nonlinearity from quantum mechanics: Dynamically unstable Bose-Einstein condensate in a double-well trap
Juha Javanainen
We study theoretically an atomic Bose-Einstein condensate in a double-well trap both quantum mechanically and classically under conditions such that in the classical model an unsta…