1202.0956 (V. S. Shchesnovich)

Vortex-like superfluid of Bose-Einstein condensate in the honeycomb
optical lattice with a sublattice of dissipative sites    [PDF]

V. S. Shchesnovich

We introduce the concept of the dissipative periodic lattice as an optical
lattice with periodically distributed dissipative sites. In particular, the
quantum state of Bose-Einstein condensate in the dissipative honeycomb lattice
is considered. For weak nonlinearity, in the case when each dissipative lattice
site neighbors three non-dissipated sites the condensate is driven to the
coherent superposition of the four-site discrete vortex states with alternating
vorticity, where the vortex centers are located in the dissipative sites. This
result demonstrates utility of the dissipative periodic lattices for
engineering of the quantum superfluid states with non-trivial complex order
parameters.

View original: http://arxiv.org/abs/1202.0956