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arXiv · 1711.00263

Tunable topological phases with fermionic atoms in a one-dimensional flux lattice

Y. Deng·R. Lü·L. You
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Abstract

We present a simple scheme for implementing a one-dimensional (1D) magnetic-flux lattice of ultracold fermionic spin-$1/2$ atoms. The resulting tight-binding model supports gapped and gapless topological phases, and chiral currents for Meissner and vortex phases. Its single-particle spectra exhibit topological flat bands at small flux, and the flatness sensitively depends on hopping strength. An effective $p$-wave interaction arises in a $s$-wave paired superfluid. Treating atomic internal states as forming a synthetic dimension and balancing the interplay of magnetic flux and Zeeman field, our model describes a tunable topological Fermi superfluid, which paves the way towards experimental explorations of non-Abelian topological matter in 1D atomic quantum gases.

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Y. Deng, R. Lü, L. You. 2017-11-01. Tunable topological phases with fermionic atoms in a one-dimensional flux lattice. https://doi.org/10.1103/physrevb.96.144517

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