Tuesday, June 5, 2012

1206.0191 (Theja N. De Silva)

Phase diagram of two component dipolar fermions in one-dimensional
optical lattices
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Theja N. De Silva
We theoretically map out the ground state phase diagram of interacting dipolar fermions in one dimensional lattices. Using a bosonization theory in the weak coupling limit at half filling, we show that one can construct a rich phase diagram by changing the angle between the lattice orientation and the polarization direction of the dipoles. In the strong coupling limit, at a general filling factor, we employ a variational approach and find that the emergence of a Wigner crystal phase due to the long-range nature of the interaction. Further, we calculate the structure factor within our variational approach and find that it provides a clear signatures of the particle ordering in the Wigner crystal phases. The predicted quantum phases can be constructed and detected via currently available experimental techniques in cold atom physics.
View original: http://arxiv.org/abs/1206.0191

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