Speaker
Prof.
W. Vincent Liu
(University of Pittsburgh)
Description
An exciting thrust of cold atom research is to explore some
unique aspects of such systems that have no prior
analogue in electronic solids. An emergent topic along this
line is the study of cold atoms coherently excited up to the
higher orbital bands of optical lattices in recent experiments,
motivated in part by early theoretical proposals. In this talk,
I will report in theory that such orbital systems can show
intriguing phases of matter. For example, interacting
fermions on a two-leg ladder of unequal parity orbitals,
which is derived from the experimentally realized double-
well lattices by dimension reduction, are found topological in
calculation.
References:
[1] Nat. Phys. 7, 101 (2011);
[2] Nat. Phys. 8, 6770 (2012);
[3] arXiv:1205.0254. Work done in collaboration with S.
Das Sarma, A. Hemmerich, M. Lewenstein, X. Li, K. Sun,
and E. Zhao.
Acknowledge support by ARO, AFOSR, and DARPA of the
U.S. DOD, A. Mellon Foundation, and NSF of China.
Primary author
Prof.
W. Vincent Liu
(University of Pittsburgh)
