Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session M07: Quantum Phases in Optical Lattices II
2:00 PM–4:00 PM,
Wednesday, June 2, 2021
Chair: Matthew Nichols, Harvard
Abstract: M07.00004 : Topological semimetal and superfluid of s-wave interacting fermionic atoms in an orbital optical lattice*
2:36 PM–2:48 PM
Not Participating
Presenter:
Bo Liu
(School of Physics, Xi'an Jiaotong University, Xi'an 710049, China)
Authors:
Maksims Arzamasovs
(School of Physics, Xi'an Jiaotong University, Xi'an 710049, China)
Shuai Li
(School of Physics, Xi'an Jiaotong University, Xi'an 710049, China)
W. Vincent Liu
(Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh PA 15260, USA)
Bo Liu
(School of Physics, Xi'an Jiaotong University, Xi'an 710049, China)
tunable geometry open up new regimes for quantum many-body states of matter
that previously had not been accessible. Here we introduce a symmetry-based
method of utilizing the geometry of optical lattice to systematically control
topologically non-trivial orbital hybridization. Such an orbital mixing leads to an
unexpected and yet robust topological semimetal at single-particle level for a gas
of fermionic atoms. When considering s-wave attractive interaction between atoms
as for instance tuned by Feshbach resonance, topological superfluid state with high
Chern number is unveiled in the presence of on-site rotation. This state supports chiral
edge excitations, manifesting its topological nature. An experimental realization scheme
is designed, which introduces a systematic way of achieving a new universality class
(such as Chern number of 2) of orbital-hybridized topological phases beyond geometrically
standard optical lattices.
*Work supported in part by the National Key Research and Development Program of China, NSF of China,Cyrus Tang Foundation,the Fundamental Research Funds for the Central Universities of China, AFOSR,MURI-ARO, and Shanghai Municipal Science and Technology Major Project .
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