Synthetic gauge fields in synthetic dimensions: interactions and chiral edge modes

Year: 2016

Authors: Barbarino S., Taddia L., Rossini D., Mazza L., Fazio R.

Autors Affiliation: NEST, Scuola Normale Superiore & Istituto Nanoscienze-CNR, I-56126 Pisa, Italy;
Scuola Normale Superiore, I-56126 Pisa, Italy;
CNR—Istituto Nazionale di Ottica, UOS di Firenze LENS, I-50019 Sesto Fiorentino, Italy;
Département de Physique, Ecole Normale Supérieure / PSL Research University, CNRS, 24 rue Lhomond, F-75005 Paris, France;
The Abdus Salam International Centre for Theoretical Physics (ICTP), I-34151 Trieste, Italy

Abstract: Synthetic ladders realized with one-dimensional alkaline-earth(-like) fermionic gases and subject to a gauge field represent a promising environment for the investigation of quantum Hall physics with ultracold atoms. Using density-matrix renormalization group calculations, we study how the quantum Hall-like chiral edge currents are affected by repulsive atom-atom interactions. We relate the properties of such currents to the asymmetry of the spin resolved momentum distribution function, a quantity which is easily addressable in state-of-art experiments. We show that repulsive interactions significantly enhance the chiral currents. Our numerical simulations are performed for atoms with two and three internal spin states.


Volume: 18      Pages from: 035010-1  to: 035010-12

More Information: We thank Leonardo Fallani and Guido Pagano for enlightening discussions, and Stefano Sinigardi and Daniele Cesini for technical support. We acknowledge INFN-CNAF for providing us computational resources and support, and D Cesini in particular. We acknowledge financial support from the EU integrated projects SIQS and QUIC, from Italian MIUR via PRIN Project 2010LLKJBX and FIRB project RBFR12NLNA. LM was supported by LabEX ENS-ICFP: ANR-10-LABX-0010/ANR-10-IDEX-0001-02 PSL*. RF acknowledges the Oxford Martin School for support and the Clarendon Laboratory for hospitality during the completion of the work.
KeyWords: synthetic gauge fields; synthetic dimension; alkaline-earth(-like) atoms; interactions and nonlinear effects; density-matrix renormalization group an
DOI: 10.1088/1367-2630/18/3/035010

Citations: 48
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