期刊
CHEMICAL PHYSICS
卷 482, 期 -, 页码 303-310出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chemphys.2016.08.026
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-
资金
- Deutsche Forschtmgsgemeinschaft (DFG) [SFB 925]
The collective dynamics of a dipolar fermionic quantum gas confined in a one-dimensional double-well superlattice is explored. The fermionic gas resides in a paramagnetic-like ground state in the weak interaction regime, upon which a new type of collective dynamics is found when applying a local perturbation. This dynamics is composed of the local tunneling of fermions in separate supercells, and is a pure quantum effect, with no classical counterpart. Due to the presence of the dipolar interactions the local tunneling transports through the entire superlattice, giving rise to a collective dynamics. A well-defined momentum-energy dispersion relation is identified in the ab-initio simulations demonstrating the phonon-like behavior. The phonon-like characteristic is also confirmed by an analytical description of the dynamics within a semiclassical picture. (C) 2016 Elsevier B.V. All rights reserved.
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