1202.3526 (Jie Zhang)

Quaternary-singlet State of Spin-1 Bosons in Optical Lattice    [PDF]

Jie Zhang

We present the quantum ground state properties of spinor condensates, which
is confined in a periodic or double-well potential and subject to a magnetic
dipole-dipole interaction between nearby wells. A novel singlet state arise in
the system and can be discussed in explicit form. Caused by the competition
between the intra-site spin exchange interactions and the inter-site
dipole-dipole interactions, this quaternary-singlet state is a entangled state
formed by at least four particles and vanish the total spin. This is distinct
from the direct product of the two conventional singlet pairs.

View original: http://arxiv.org/abs/1202.3526